Vertical Up Stick Welding: The Complete Guide

A first-year apprentice once stared at a 3/8-inch plate clamped upright in the booth and quietly admitted he had burned three rods just to get a quarter-inch of bead that didn’t sag. Vertical up stick welding is the position where most beginners hit a wall — because gravity is now working against your puddle, and everything you learned flat suddenly has to be relearned.

What Is Vertical Up Stick Welding and Why It Matters

Vertical up stick welding, also called uphill SMAW, is shielded metal arc welding performed with the weld bead running from the bottom of the joint toward the top. The electrode points slightly upward, the puddle is allowed to freeze layer by layer, and each new pass is stacked on the one below it. It is the position that separates a hobbyist from a structural welder, because gravity is no longer your friend. The molten metal wants to sag, drip, and roll out of the joint, and everything you learned running beads flat on a bench has to be relearned with that constant downward pull in mind.

The contrast with vertical down welding is immediate. In vertical down, the electrode travels top to bottom, dragging a fast, shallow puddle that freezes quickly behind it. Vertical down is quick and distortion-friendly, but it produces shallow penetration. Vertical up is slower and harder, but it drives the arc deeper into the root, gives you far better control of the puddle on thick material, and is the position most codes prefer or require for heavy structural work.

Where Vertical Up Is Used

You will run into uphill stick welding almost anywhere heavy steel is joined in the field:

• Structural plate and built-up members — column splices, gusset connections, and heavy groove welds on bridges and buildings.
• Pressure pipe — the 5G and 5A positions, where pipe is fixed horizontally or at an angle and the welder must run a root pass and then fill and cap uphill.
• Heavy fabrication and repair — mill equipment, shipyard work, mining frames, and any joint over roughly 1/4 inch where full penetration matters.
• Field fit-up that won’t move — when the piece can’t be rolled into a flat position, vertical is simply where the joint is.

Part of mastering the position is speaking the language inspectors speak. AWS welder qualification positions are designated 1G flat, 2G horizontal, 3G vertical, and 4G overhead for plate groove welds, with fillet positions running 1F through 4F. A vertical fillet on a plate is 3F; a vertical groove weld is 3G; a fixed horizontal pipe groove is 5G, and a fixed pipe at a 45-degree slope is 5A. One practical payoff is worth remembering: a welder who passes a 3G plate groove test is qualified in the flat, horizontal, and vertical positions under AWS D1.1 qualification ranges. One test card covers three positions, which is why 3G is such a valuable certification to hold. AWS also maintains broader professional certification programs for welders and inspectors who want credentials that travel across employers (American Welding Society certification).

The Electrode Rule of Thumb

Not every rod will run uphill. Electrodes are classified by the positions they can legally be run in, and that designation is stamped right on the coating. The general field rule is simple: low-hydrogen 7018 electrodes run uphill on structural steel, while 6010 and 6011 rods are the go-to for downhill root passes on pipe. A 6013, by contrast, is an all-position rod that many beginners learn on, but it struggles on heavy uphill work where penetration and puddle control matter. Our all position welding rod guide breaks down which rods carry the all-position rating and what each is genuinely good for.

Why This Position Is the Hard One

Three forces conspire against you uphill. Gravity pulls the puddle down. Arc force pushes molten metal ahead of the electrode. And heat builds in the plate above the puddle, softening the joint before you get there. Manage all three and the bead stacks cleanly; ignore one and you get sagging, undercut, or a root that never fully fuses. That is why stick welding remains respected as a skill process — the rod is doing chemical, electrical, and mechanical work at the same time, and uphill magnifies every variable (why SMAW still holds its ground).

How to Actually Weld Stick Vertical Up Successfully

The short answer, which the rest of this guide expands on: run less amperage than you would flat (roughly 10 to 20 percent lower), keep a tight arc of about 1/8 inch or less, use a deliberate freeze-and-advance rhythm so the puddle solidifies before you move, and let each pass support the next. Watch the toes of the weld for undercut, clean the slag completely between passes, and resist the urge to dwell. Industry guidance from ESAB and The Fabricator consistently points to the same fundamentals: short arc, controlled travel, and patience between advances (ESAB University on vertical stick welding; five tips for vertical stick welding). Gravity never stops pulling, but a well-frozen puddle simply gives it nothing to pull on.

How Gravity Changes the Puddle: The Physics Behind Uphill Welding

Flip a joint from flat to vertical and something fundamental changes: your weld pool is no longer sitting in a shallow dish of its own heat. It is hanging on the edge of a cliff. Gravity pulls the molten metal down the plate while the arc force from the electrode pushes it up and into the joint. Every second of an uphill weld is a controlled tug of war between those two forces, and the welder’s whole job is to make sure gravity only loses a little at a time.

Heat Runs Ahead of You

The second problem is invisible until you feel it. The arc does not only melt the metal under the electrode; it preheats the inches of plate directly above the puddle. On a horizontal or flat joint that heat spreads away, but on an uphill joint it stays right where you are about to travel. The next half-inch of steel is already hot and hungry, so if you push forward too fast the puddle goes liquid in front of you and starts to sag or “rope” down the face of the joint.

This is why uphill stick welding feels slower than flat welding even when your hand is moving at the same speed. You are not just melting metal, you are waiting for each small deposit to freeze enough to hold the weight of the next one.

Arc Length: The Diameter Rule

Of all the variables you control, arc length is the one that decides whether the puddle behaves. Keep the arc tight, roughly the diameter of the electrode’s core wire: about 1/8 inch for a 1/8-inch rod and a hair less for 5/32-inch. A short arc concentrates the plasma jet directly on the deposited metal, which is what holds the puddle up against gravity. Lengthen it and two things happen at once: the arc spreads its heat wider, adding liquid faster than you can freeze it, and the shielding envelope around the molten pool breaks down.

Along with the tight arc, vertical uphill settings for a 7018 are typically reduced about 10–15% compared with the same rod and thickness in flat position. Less current means less liquid metal per second, which gives the freezing front a chance to keep up. Practitioners describe the resulting rhythm as freeze-and-advance: deposit a small shelf, let it glaze over at the leading edge, then step up onto it and repeat. ESAB’s vertical stick welding guidance emphasizes the same combination of short arc, reduced amperage and a consistent stepping rhythm.

Travel speed works with arc length to set the balance. Move too fast and the puddle is starved, leaving cold lap or lack of fusion at the toes. Move too slowly and the puddle accumulates, sags, and drags heat into the plate. The correct speed is simply the one where the leading edge of the puddle stays a tight, rounded crescent instead of flattening out and running.

Penetration Versus Reinforcement

Here is the trade-off that surprises beginners: at the same amperage, vertical up generally produces deeper penetration than a flat weld. Three things combine to create that. The arc points directly into the unwelded land rather than across a horizontal pool, gravity holds the molten metal against the joint instead of letting it spread outward, and the slower travel speed concentrates heat in one place. The result is excellent root fusion, which is exactly why uphill is the default for structural groove welds and pressure pipe roots and fills.

The cost is reinforcement. Metal builds up faster than it spreads, so the cap rises quickly and a weave that is too wide will pile the bead proud of the plate. On code work you would rather run several stringer passes with full tie-in to the side walls than chase height with one fat weave.

Why Undercut Starts at the Toes

Undercut is the classic vertical-up defect, and it is almost always a timing problem rather than a settings problem. The toes of the weld, where the bead meets the plate edges, are the coldest part of the joint. If you dwell at the edges while weaving, the arc melts a groove into the plate but the filler metal has nowhere to sit before it freezes, so a notch is left behind. On the next pass that notch never fully closes.

The fix is a deliberate pause pattern: hold briefly in the center of the weave to build the bead, then move quickly across each edge without stopping. As The Fabricator’s vertical stick welding tips put it, excessive dwell at the plate edges while weaving is the leading cause of undercut in vertical groove welds. Once you watch for it deliberately, you will see the notch forming in real time and can speed the weave up before it gets deep enough to fail visual inspection.

Choosing the Right Stick Electrode for Vertical Up

Pick the wrong rod and vertical up becomes a fight you cannot win. An electrode that runs beautifully flat can sag the moment the plate goes upright, while the right one stacks itself. Electrode selection is where most failed weld tests begin, and uphill the field is smaller than it looks.

How to Read an AWS Electrode Classification

Every stick electrode sold for structural work carries an AWS (American Welding Society) classification, and the code is not decorative. Take E7018 and break it down digit by digit:

• E — the electrode is for arc welding.
• 70 — a minimum tensile strength of 70,000 psi in the as-deposited weld metal. A 60-series rod gives 60,000 psi.
• 1 — the electrode is qualified for all positions: flat, horizontal, vertical, and overhead. A digit of 2 or 4 means flat and horizontal fillet only.
• 8 — the last digit describes the coating. An 8 is a low-hydrogen, iron-powder coating.

That third digit matters most here: if it is not a 1, the rod is not rated uphill, no matter how much you coax it. For the full coding system, our all-position welding rod guide covers every common suffix.

Electrode	Tensile	Rated Positions	Uphill Verdict
E6010	60,000 psi	All	Yes — deep-penetrating root passes
E6011	60,000 psi	All	Yes — AC repair work on dirty plate
E6013	60,000 psi	All	Possible but poor uphill
E7018	70,000 psi	All	Yes — the structural default
E7024	70,000 psi	Flat & horizontal fillet	No — not rated out of position

E7018: The Default Structural Vertical-Up Rod

Uphill, the structural default is E7018. Its low-hydrogen coating gives a calm, stable arc, and the iron powder boosts deposition so the bead builds quickly. The heavy slag blanket sits on the puddle and supports it while it freezes, real help when gravity pulls molten metal down. Its 70,000 psi strength matches structural grades such as A36, which is why building and bridge procedures default to it. Both ESAB’s vertical stick welding notes and The Fabricator’s five uphill tips point to 7018 for fill and cap passes on plate and pipe.

E6010 and E6011: Root-Pass Specialists

Where 7018 is a smooth operator, E6010 is a digger. Its cellulose coating burns hot and forceful, punching deep into the joint and blowing through an open root to form the keyhole pipe welders chase. It freezes fast, which is what you want when metal tries to run downhill. E6011 is the AC-friendly cousin for farm and maintenance repairs on plate with rust, paint, or mill scale, one of the real advantages of stick welding over cleaner processes.

Why E6013 and E7024 Stay Off the Vertical Plate

E6013 is rated all-position, but its soft, low-penetration arc and thick rutile slag make it poor beyond light sheet: the weld sits on the surface instead of biting in, and slag traps along the toes. E7024 is a different problem. Its heavy iron-powder coating is built for high deposition in flat and horizontal work, and the classification digit of 2 says plainly it is not rated for vertical. Uphill that deposit is too large and fluid to hold; it slumps before it freezes. Keep 7024 for downhand fillets and butt welds where you can move fast. For specialty or higher-strength materials, our alloy steel welding electrodes guide covers filler-matching rules.

Hydrogen Control: The Storage Rule Nobody Skips

E7018 has one non-negotiable weakness: its low-hydrogen coating absorbs moisture from the air, and hydrogen entering a weld is the primary cause of delayed cold cracking in thick, restrained joints. Rods stay in a heated rod oven or a sealed container until the moment you use them, and exposed rods are discarded or reconditioned within the manufacturer’s limits. Check the AWS classification system and certification requirements at AWS, and never assume a rod pulled from a damp cardboard box will meet a qualified welding procedure.

Get the electrode right and the rest of vertical up — settings, travel speed, weave pattern — becomes far easier to dial in. Run 7018 for fill and cap, reach for 6010 to dig into a root, and leave flat-position rods in the flat position.

Machine Settings and Equipment Setup for Vertical Up

You can have perfect hand speed and still lose a vertical-up pass if the machine is set wrong. In uphill SMAW, settings matter more than in any other position because gravity is already pulling the puddle down; every extra amp you add works against you. Dialing in the machine, the polarity, the ground, and the joint prep takes ten minutes before the arc is struck, and it is the cheapest insurance you will ever buy.

Choosing Amperage by Rod Diameter and Thickness

A reliable starting point is the old rule of thumb: roughly one amp per 0.001 inch of electrode diameter. A 1/8-inch rod (0.125 in) suggests about 125 amps; a 5/32-inch rod (0.156 in) suggests about 155 amps. That number is a flat-position baseline. For vertical up you then drop back, typically 10 to 15 percent, and fine-tune by watching the puddle rather than the dial. Material thickness, bevel width, root opening, and whether you are on a root, fill, or cap all nudge the final number.

Most E7018 welding procedures for structural work run on DC electrode positive (DCEP), also called reverse polarity, which puts more heat into the work and gives the deep, stable penetration uphill roots need. E6010 also runs DCEP; E6013 is commonly run electrode negative. If your machine is a constant-current stick/TIG unit, polarity is set at the DINSE connectors or a internal switch, so confirm it before you strike an arc. The general behavior of these electrodes across positions is covered well in our all position welding rod guide.

Typical vertical-up starting settings (verify against your rod manufacturer’s published range)

Electrode	Diameter	Flat baseline	Vertical-up start
E7018	1/8 in	110–130 A	90–110 A
E7018	5/32 in	140–170 A	115–140 A
E6010	1/8 in	75–105 A	70–95 A
E6010	5/32 in	100–130 A	90–115 A

Start Type, Arc Force, and Ground Placement

Scratch starts are fine on a buzz-box, but they spit and can leave tungsten-style inclusions at the start point, so lift-arc or a modern high-frequency stick start is cleaner and easier on the plate. If your machine has an arc force (or electrode-amperage) dial, use it sparingly: a moderate setting helps the rod resist stubbing when your arc length shortens, but cranking it up just adds spatter and heat into a puddle that is already fighting sag. As ESAB’s guidance on vertical stick welding emphasizes, a short, controlled arc does more for bead shape than any dial setting.

Ground placement is the setup step beginners skip. Clamp it to clean, bare metal as close to the weld zone as the joint allows, and never on the far side of the fixture, on painted tubing, or on a rusty edge. A poor ground forces the arc to wander, changes your effective amperage at the puddle, and shows up as erratic penetration on the root pass. If you are still assembling a rig, our Airgas welding equipment guide walks through what a stick-ready setup actually needs.

Joint Prep: Bevels, Preheat, and Accessory Readiness

A typical single-V groove uses a 37.5-degree bevel per face, giving a 75-degree included angle, with a small root face (land) of roughly 1/16 to 1/8 inch and a root opening set by the procedure. Grind the bevel faces to bright metal, remove mill scale within about an inch of the joint, and tack securely so the plates do not pull out of alignment as you climb.

Thick sections and restrained joints may require preheat. AWS D1.1 sets preheat requirements based on material thickness, steel grade, and carbon equivalent, and getting this wrong causes hydrogen cracking that no amount of technique can fix later. The Fabricator’s five tips for vertical stick welding also flags interpass temperature control as a routine part of the setup.

Set these variables before the first bead: correct polarity, amperage within the range above, a short arc expectation, a clean tight ground, a properly beveled and preheated joint, and dry electrodes. With the machine sorted, the rest of the work belongs in your hands.

Step-by-Step Vertical Up Technique: Root, Fill, and Cap

Settings get you in the ballpark. Technique is where vertical up clicks or falls apart, and it comes down to rhythm, sequence, and reading the puddle one bead at a time. Here is the walk-through from tacked joint to finished cap.

Tacking and Fit-Up Before the Arc

The joint has to hold itself before it can weld itself. Tack both ends of the groove, then add a middle tack on longer plates so the root gap does not creep shut as the metal expands. Treat tacks as real welds: chip and brush them, and make sure they are fused at the root, not perched on the bevel faces. A tack that burns out mid-pass is the fastest route to a slag inclusion. Recheck the gap and land, then confirm your bevel — 37.5 degrees per side gives the standard 75-degree included angle on a single-V groove, which stops the electrode from fouling the walls near the bottom. Before you strike the arc, a five-minute refresher on our All Position Welding Rod Guide: Types, Uses & Tips pays off.

The Root Pass: Keyhole or Bridged

Two root approaches, depending on whether the groove is open or backed. On an open root you are running E6010 (or 6011 on AC) with a whip-and-pause motion: strike the arc, hold back and let the puddle burn through, then whip forward to freeze the keyhole and step back into it. On a backed root the strip handles containment, so you can bridge the gap with a steady short-arc bead, letting the puddle wash into both land edges as you climb.

Fill Passes: Stacking Beads from the Root Up

Fill work climbs from the bottom. Run the first pass slightly offset toward one side wall, then alternate sides so the groove fills evenly instead of leaning one way. The rule that matters most: every pass must tie into the previous bead and wash into the groove wall at the same time. Let the outer edge of the puddle wet the side wall as you pass it — the moment you dwell on the wall while the center keeps piling, you have undercut at the toe.

Chip and wire-brush every pass before the next one goes down. Trapped slag between layers is the leading cause of inclusions in multi-pass vertical welds, and once the cap is on it is buried for good. Keep interpass temperature inside procedure limits — commonly a few hundred degrees Fahrenheit on plain carbon steel — so the previous bead is warm, not glowing. On why SMAW still owns this kind of structural field work, see Advantages of Stick Welding: Why SMAW Still Wins.

Stringers, Weaves, and What Procedures Allow

Many structural procedures require stringers rather than wide weaves, and where weaving is allowed it is typically capped at about two to three times the electrode diameter — guidance echoed by The Fabricator and ESAB University. If you weave, use a deliberate pattern: a Z-weave pauses at each toe, a triangle keeps the heat moving and the puddle narrow, and a crescent sits between the two. Width and speed are controlled by the pause, not by waving the rod faster.

Reading the Puddle and Running Restarts

Watch the leading edge, not the glow. A puddle about one rod diameter wide with bright, wet toes means your amperage and rhythm are right; a narrow, sluggish puddle that piles means too cold, and a wide, fast one that runs means too hot or too long an arc. Hold the rod nearly vertical with a slight downward push, and work to a freeze-and-advance rhythm: let the puddle set for a beat, move a fraction, let it set again.

Restarts need their own discipline. When the rod runs out, back up slightly over the crater to fill it, chip and brush it, then strike on solid, cleaned weld metal about a half-inch back and work forward, tying into the crater rather than starting on its edge.

Cap passes stack across the groove with the same tie-in rules, just wider, and the last pass should feather into the bevel edges without hanging up or leaving a sharp toe. A slightly convex, evenly rippled cap that fuses cleanly at both toes will pass visual inspection long before a pretty cap with cold lap ever will.

Common Vertical Up Defects and How to Fix Them

Every welder who learns uphill stick welding collects rejected coupons before getting it right. The good news is that vertical up failures are predictable. Almost every sagging bead, torn toe, or blowhole traces back to one of seven classic defects, each with a cause you can diagnose and a fix you can apply on the very next rod.

Sagging or “Roping” Puddle

Symptom: The puddle swells, widens, and drools downward ahead of your arc. The finished bead looks like a rope of weld metal draped over the joint instead of tied into it.

Cause: Too much heat, too long an arc, or travel too slow for the amperage. The metal never freezes before more filler arrives.

Fix: Drop amperage by roughly 5 to 10 percent, shorten the arc to near-contact, and tighten your rhythm. If you are weaving, narrow it. A short arc is the single most effective anti-sag tool you have, because it keeps arc force pushing into the joint instead of spreading the puddle sideways. The freeze-and-advance tempo described in ESAB’s guidance on vertical stick welding is exactly what fixes this defect.

Undercut

Symptom: A groove melted into the base metal runs along one or both toes of the weld, above the reinforcement. It looks like a thin channel cut into the plate.

Cause: Dwelling too long at the edges of a weave, amperage too high, or an arc held too long at the side walls. Undercut is one of the most common visual-reject conditions inspectors flag under AWS qualification and certification frameworks and D1.1 visual inspection.

Fix: Count a brief pause at each toe, then move quickly across the center. Reduce amperage slightly, keep the arc tight, and hold your weave width to about 2.5 to 3 electrode diameters. If undercut persists on stringer passes, you are simply moving too slowly at the wall.

Porosity

Symptom: Pinholes or wormholes in the bead surface, often appearing in clusters after a restart.

Cause: In vertical work, porosity usually traces to excessive arc length, contamination from oil, paint, or rust, or damp electrode storage. A 7018 sitting out in shop humidity picks up hydrogen and starts acting like a different rod entirely.

Fix: Shorten the arc, clean the joint back to bright metal, and store low-hydrogen rods in a heated rod oven. If you suspect hydrogen on a structural or alloy joint, review electrode storage discipline in our guide to Alloy Steel Welding Electrodes: Selection, Use & Safety.

Slag Inclusion

Symptom: Layers of flux trapped between passes or between the weld and the side wall, usually visible on a ground cross-section or revealed by radiography.

Cause: Flux from the previous bead never got removed. Heavy weaves that trap slag in the center of the puddle make it worse.

Fix: Chip and wire-brush every pass to shiny metal before starting the next one. Angle the rod so the arc cleans ahead of the puddle, and prefer stringer beads over wide weaves when code work demands it.

Lack of Fusion at the Root

Symptom: The root pass sits in the groove without actually bonding to the bevel faces or the backing; a bend test snaps it open.

Cause: Amperage too low, arc aimed at the wrong point, or a root opening too wide to bridge.

Fix: Increase heat to the lower end of the rod’s range for the root, point the arc directly at the joint intersection, and close the root gap slightly. On open-root pipe, watch for the keyhole and feed the rod into it rather than hovering above it.

Cold Lap (Overlap)

Symptom: Weld metal rolls over the base metal without fusing, usually at the toes.

Cause: Travel speed too fast at the edges, insufficient current, or a puddle that was never pushed far enough into the corner.

Fix: Slow slightly at the toes, add a touch of amperage, and confirm your rod angle keeps arc force directed at the fusion line.

Crater Cracks

Symptom: Star-shaped cracks at the stop or restart point.

Cause: Pulling the arc straight out of a filled crater, leaving a shrinkage void that cracks as it cools.

Fix: Back up slightly over the crater, hold the arc for a beat to fill it, then break it. On restarts, strike the arc on the leading edge of the previous bead and wash back into it.

None of these defects require special talent to avoid. They require a clean joint, a short arc, honest amperage, and disciplined cleaning between passes. Photograph each bead, compare it against the last, and you will see the defect list shrink long before you expect it.

Vertical Up vs. Vertical Down: When to Use Each

Both directions use the same rod, the same machine, and the same plate, but they do not produce the same weld. Choosing between uphill and downhill travel is one of the most consequential decisions you make on a vertical joint, and getting it backwards is a common reason a weld passes visual inspection yet fails a bend test or, worse, a service load.

What Actually Changes When You Flip Travel Direction

The physics is simple: when you travel downhill, the arc is always pointing at metal that has not yet melted, while the puddle behind it is being pulled by gravity into a thin, fast-moving film. The result is speed. Downhill runs are noticeably quicker, the plate stays cooler, and distortion drops. The trade-off is penetration. That thin puddle sits on the surface rather than digging in, so root fusion becomes inconsistent and depth of penetration falls well short of what the same amperage gives you traveling uphill.

Uphill travel works against gravity on purpose. The leading edge of the puddle freezes slightly ahead of you, and you are continually stacking new metal onto that shelf. Arc force and a shorter arc length drive heat into the joint root, which is why vertical up generally yields deeper penetration than flat at the same settings, but it also means heat builds up faster at the toes. Dwell too long on an edge and undercut follows.

Factor	Vertical Up (Uphill)	Vertical Down (Downhill)
Travel speed	Slow, deliberate	Fast
Heat input	Higher	Lower
Penetration	Deep, reliable at root	Shallow, surface-weighted
Distortion	Greater, needs interpass control	Minimal
Puddle control	Harder; freeze-and-advance rhythm	Easier physically, harder to fuse
Typical rods	E7018, E6011	E6010, E6013
Typical use	Structural groove, heavy fillet, pipe fill/cap	Thin sheet, short fillets, pipe root

For a fuller breakdown of the electrode side of that table, see our All Position Welding Rod Guide: Types, Uses & Tips.

Where Downhill Is the Right Call

Downhill earns its place on thin material. On sheet and light-gauge work, the low heat input keeps you from blowing through, and on short vertical fillets with E6013 it gives a smooth, fast, good-looking bead. It is also the standard first pass on open-root pipe: a 1/8-inch E6010 run downhill drives a keyed root into the land while the puddle is still fluid enough to follow you, which is the technique taught in most 5G and 5A procedures. The fill and cap layers that follow typically switch to E7018 run uphill, because those passes need deposition control and sound, low-hydrogen metallurgy rather than raw speed. As ESAB’s vertical stick welding guidance notes, the rod’s usability characteristics, not habit, should drive direction.

Where Downhill Gets Restricted or Banned

On heavier structural plate, especially groove joints that require full penetration, codes get strict. Structural welding codes may prohibit or place limits on downhill travel on heavy plate because the shallow, erratic fusion cannot be assumed to meet the required penetration, and the resulting weld is often rejected in bend testing before anyone argues about it. When a procedure specification or an engineer’s drawing calls for uphill, that instruction overrides your preference for speed. The Fabricator’s vertical stick welding tips make the same point from the shop floor: direction, amperage, and arc length work as a set, not independently.

The practical rule to carry with you:

• Full penetration required, plate 1/4-inch and heavier: run uphill.
• Thin sheet, short fillet, cosmetic cap: downhill is fine, usually with 6013.
• Open-root pipe: 6010 root downhill, 7018 fill and cap uphill in 5G/5A.
• Any qualified procedure: follow the WPS, regardless of what works in the booth.

If you are still building comfort with direction changes, it helps to understand what stick welding does well in the first place; our piece on the advantages of stick welding explains why SMAW remains the default for field vertical work even as wire processes improve.

Bottom line: downhill trades penetration for speed, uphill trades speed for fusion. Pick the one the joint actually needs, and let the code, not the clock, make the decision.

Safety, Fumes, and Ventilation When Welding Vertical Up

Generic safety checklists miss something about uphill work. Vertical up changes the geometry of the hazard: your face sits above the arc, the joint is at nose height or higher, and the fume plume has a straight shot into your breathing zone. Add a hood that limits your vision and a puddle you watch at close range, and uphill welding deserves its own routine.

PPE: The Basics, Done Properly

Start with the helmet. For stick welding on plate in the 70–140 amp range common to vertical up, a shade 10 is usually the minimum, with shades 11 to 13 covering hotter root passes and larger rods. An auto-darkening helmet with a fast switching speed helps uphill specifically, because you break arc more often for restarts, slag chipping, and repositioning than you do running flat. A fixed shade lens is perfectly acceptable too, just keep it scratch-free so you can actually read the puddle.

Under the hood, wear safety glasses with side shields. Slag pops uphill, and gravity sends chips straight down toward any gap in your collar. Jacket and pants should be flame-resistant leather or heavy cotton, snug at the wrists and collar so sparks can’t ride up a sleeve. Gloves need gauntlet-style cuffs, because your hands sit close to the arc and the rising heat in an upright position.

Why the Fume Plume Reaches You Faster

Here’s the part many beginners miss. Welding flat, buoyant fumes rise away from your face and drift overhead. Welding vertical up, the puddle sits directly below your nose, and the thermal plume carries welding fume, ozone, and metal oxides upward into the gap between the joint and your helmet. You are positioned downwind of your own arc by default.

OSHA defines the breathing zone as the area within roughly 10 inches of the welder’s nose and mouth, and uses it as the sampling point for exposure limits. In a vertical up groove weld, the arc is frequently inside that radius.

Where local exhaust isn’t used, OSHA 1926.353 requires general mechanical ventilation of at least 2,000 cubic feet per minute per welder. That’s a floor, not a target, and it assumes fumes aren’t being funneled back at you by the plate itself. A fume extraction arm just above and to the side of the joint does more for uphill welders than any amount of general airflow.

Confined Spaces: Never Ventilate by Hope

A vertical pass inside a tank, vessel, or tight structural cavity is where welders get hurt. Fumes accumulate faster than you can smell them, oxygen can be displaced, and escape routes are limited. OSHA’s general industry welding standard, 1910.252, and the agency’s welding safety guidance call for local exhaust or supplied-air respiratory protection in such spaces. Practical ventilation guidance from university EHS programs echoes this: ventilation must be arranged so fumes are drawn away from the welder’s breathing zone, and confined space entry requires a permit, atmospheric monitoring, and a standby person. For background on long-term exposure effects, NIOSH’s welding topic page summarizes the respiratory and neurological risks of welding fume.

Arc Radiation and Electrical Safety

Vertical up puts you closer to the arc than flat welding usually does, which means more UV exposure to exposed skin and more risk of arc flash to anyone walking past. Screen the booth, keep your collar closed, and remember that the same UV that burns skin also causes photokeratitis in unprotected bystanders. On the electrical side, inspect the electrode holder, cable insulation, and ground clamp before every session. Uphill work involves more restarts and repositioning, so cables get dragged and pinched more often. Keep work surfaces and gloves dry, never drape a cable over your shoulder, and clamp the work lead to clean metal near the joint rather than on a painted or rusty flange. For a broader look at why stick remains popular despite these demands, see our take on the advantages of stick welding and the practical guidance in our all-position welding rod guide.

Practice Drills, Certification Paths, and Skill Building

Knowing the technique and pulling it off in the booth are two different things. The gap closes through deliberate practice: a sensible progression, specific drills, honest self-grading, and the qualification test that turns skill into a paycheck.

A Progression Plan: Flat to Horizontal to Vertical to Overhead

Uphill stick welding is not the place to learn puddle control for the first time. The standard progression runs flat (1F/1G), horizontal (2F/2G), vertical (3F/3G), then overhead (4F/4G), and each step adds a gravity problem: flat settles the puddle, overhead hangs molten steel above your collar. Master stringers before weaves and a backed groove before an open root. An all position welding rod guide helps you pick electrodes that behave predictably as you climb, since 6010 and 7018 both run all positions and dominate structural training.

Booth Drills That Build Vertical Up Skill Fast

A box of 1/8-inch 7018 and a 3/8-inch plate scrap are most of what you need. Five drills cover nearly everything:

• Bead-on-plate uphill stringers. Strike two inches from the bottom, run to the top, hold a consistent 1/4-inch bead, no weaving. This builds freeze-and-advance rhythm.
• Guided line drills. Scribe parallel lines with soapstone and keep the puddle inside them. You are training travel speed, not luck.
• Vertical fillet (3F) tees. Short T-joint fillets are more forgiving than grooves and let you feel the puddle sag before it falls.
• Deliberate restarts. Every third rod, stop mid-pass, chip the crater clean, restart on top of it.
• Groove coupons with backing, then open root. Run a single-V groove over a backing strip until the profile repeats, then remove the strip and work the keyhole.

ESAB’s vertical stick welding guidance and The Fabricator’s five tips for vertical stick welding keep circling the same theme: short arc, tight rhythm, patient advancement. Drills turn that advice into reflex.

Self-Diagnosis: Photograph, Grind, and Read the Bead

You cannot fix what you cannot see. Photograph every coupon under the same lighting and compare weeks later. Better still, cut a coupon in half, grind and polish the cross-section, and etch it to reveal the penetration profile: you will see how far the root fused and whether the toes tied in, long before a test panel tells you more expensively.

The 3G and 4G Qualification Tests Under AWS D1.1

To prove the skill, the structural reference is AWS D1.1, which governs welder performance qualification for carbon steel. Its vertical groove test (3G) is commonly run on 3/8-inch plate, thick enough to demand multiple passes yet cheap to burn. The overhead groove test is 4G, and structural fabrication shops frequently pair the two as a combination qualification.

Test coupon	Position tested	What it qualifies you for
3G groove, 3/8 in plate	Vertical	Flat, horizontal, and vertical plate work within D1.1 ranges
4G groove	Overhead	Overhead plate groove work, plus positions already held
3G + 4G combination	Vertical and overhead	All positions on plate, the standard all-round shop ticket

The test plate is welded exactly as production would be (same process, electrode family, and position), then cut into strips. Face, root, and side bends are pulled in a guided-bend jig, and the stretched surface exposes cracks, slag inclusions, or lack of fusion a pretty bead can hide. AWS publishes the qualification framework through its certification and education programs.

What Inspectors Look For

Visual inspection comes first. The inspector checks profile and reinforcement height, undercut (capped at 1/32 inch under D1.1’s common visual limits), porosity, cold lap, and any crack, which is an automatic fail. Slag must be fully removed between passes. A rough weld that fuses perfectly can pass; a handsome bead hiding a slag stringer at the root will not.

How Long Does Realistic Practice Take?

Weeks of consistent booth time, not days. Trade programs spread arc time across processes over a term or more, and self-learners taking a few focused sessions a week usually reach a testable vertical groove in a couple of months. Consistency beats volume: half an hour three times a week outperforms an eight-hour Saturday you dread repeating.

Why Certification Pays Off

Most structural and pipeline employers will not let you touch production steel without a current performance qualification, and an all-positions plate card makes you employable across far more of the shop. Stick proficiency lasts too: SMAW remains the go-to for field repair, remote work, and heavy plate, one reason the advantages of stick welding still hold up in modern fabrication. Structured training such as an aluminium welding course also sets out the typical costs, timelines, and career routes.

Practical Tips, Final Takeaways, and FAQ Answers

You now have the theory, the settings, the rod choices, and the defect list. What separates the welder who can talk about vertical up stick welding from the one who can actually do it is a short list of habits, repeated until they are automatic. Here is the condensed version of everything above, the way an instructor would say it at the booth door.

The Vertical Up Checklist: Do’s and Don’ts

• Do shorten your arc until you can hear the steady crackle of a frying strip, not a hiss. A long arc dumps heat into the plate and lets gravity win.
• Do hold the electrode at roughly 5–15 degrees of work angle with the travel angle pointing slightly upward, which keeps the puddle sitting on the frozen ripple below it instead of hanging off the toes.
• Do run 5–15 percent below the manufacturer’s flat-plate amperage for the same rod and thickness, then adjust by puddle behavior rather than by dial markings.
• Do build rhythm: pause at the toes, advance in small even steps, and let each ripple freeze before you move up. Consistent rhythm beats raw speed every time.
• Do chip and wire-brush between passes, and grind the tie-in zones clean before the next bead.
• Do watch the leading edge of the puddle. If you cannot see where the rod is pointing, you are welding blind.
• Do keep restarts tight: overlap the crater by about a rod diameter, then flick out and fill the crater properly.
• Don’t weave wide on code work. Stringers are the default in most structural applications because they produce more consistent penetration.
• Don’t dwell at the side walls. That is exactly how undercut is born at the toes.
• Don’t chase a sagging puddle with more speed alone. Cut amperage first, then slow your advance.
• Don’t run a high-efficiency flat-position rod like E7024 uphill, and don’t leave low-hydrogen E7018 rods lying around in humid air.
• Don’t stack a fill pass over an uncleaned root. Slag trapped once becomes slag inclusion forever.

A Real-World Scenario: 3/8-Inch Fillet on a Column

Picture a vertical fillet on a column flange, 3/8 inch thick, three passes. Set up on DCEP with a 1/8-inch E7018, drop the amperage slightly below the flat recommendation, and lock your body position so the rod stays in the same relationship to the joint as the puddle climbs. Run a root bead that ties into both plates equally, chip it clean, then place a second stringer just above it, washing the top edge long enough to tie in but not long enough to undercut. The cap finishes the leg. If the puddle starts roping, stop blaming the rod and cut ten amps. If the toes look etched rather than fused, you are too cold or moving too fast. This same logic, adjusted for rod type, carries to any uphill joint, including work you might first encounter while learning through a program like an Aluminium Welding Course: What You Learn, Costs & Careers before moving into structural steel.

Final Takeaway: How to Actually Weld Stick Vertical Up Successfully

The principal question had one answer all along: weld vertical up successfully by controlling heat and time. Short arc, reduced amperage, slight upward travel angle, small pauses at the toes, and a tight freeze-and-advance rhythm. Gravity never stops pulling, but a frozen ripple is a shelf, and every shelf you build supports the next pass. Everything else, from rod selection to interpass temperature, is in service of that one idea. It is also why stick welding remains worth mastering despite newer processes, as covered in Advantages of Stick Welding: Why SMAW Still Wins, and why uphill skill shows up on nearly every structural and pipe qualification test.

Frequently Asked Questions

Why does my vertical up puddle keep sagging? Almost always too much amperage or too long an arc. Reduce heat, shorten the arc, and pause until each ripple freezes before advancing.

What angle should the rod be held at? Roughly 5–15 degrees of work angle, with the travel angle pointing slightly upward so the frozen bead supports the molten pool.

Which rod should a beginner start with? A 1/8-inch E7018 for plate practice, because it forgives small rhythm errors; move to E6010 root passes on open-root pipe once basics are solid.

How long does it take to get competent? Most welders need several weeks of focused booth work before attempting a qualification test, with visual and bend results, not clock hours, telling you when you are ready.

Frequently Asked Questions

Which stick electrode is best for vertical up welding?

E7018 is the go-to for structural vertical-up work because its low-hydrogen, iron-powder coating gives a stable arc and good all-position control. E6010 or E6011 are better for open-root pipe roots and fast-freeze applications, while E6013 is easier for thin sheet and E7024 should be avoided out of position.

What amperage should I use for vertical up with a 1/8-inch 7018 rod?

Most welders start around 100–115 amps for 1/8-inch E7018 uphill, roughly 10–15% below flat settings. Adjust based on puddle behavior: a sluggish, ropey bead means add a few amps, while a runny puddle with undercut means back off.

Why does my vertical weld keep sagging?

Sagging usually comes from too much heat, too long an arc, or moving too fast for the puddle to freeze. Reduce amperage slightly, shorten your arc to roughly the rod diameter, and use a deliberate pause-and-advance rhythm so each section of the puddle solidifies before you climb higher.

Should I weave or run stringers vertically?

Stringer beads are preferred in most code work, including many AWS D1.1 procedures. If you do weave, keep the width modest — generally no more than two to three times the electrode diameter — and never let the puddle dwell on the side walls, which causes undercut.

Is vertical up harder than overhead?

Vertical up is generally where most welders struggle first, because gravity pulls the molten pool down the plate. Overhead is often rated as the most difficult position overall, but vertical uphill demands the most attention to rhythm, arc length, and heat control to avoid sagging and undercut.

What is the difference between vertical up and vertical down stick welding?

Vertical up gives deeper penetration and better joint strength but is slower; vertical down is faster with lower heat input but shallower penetration. Downhill is fine for thin material and short fillets with fast-freeze rods like 6010 or 6013, while heavy structural groove welds generally require uphill travel.

What does the 3G test certify a welder for?

A 3G plate groove test under AWS D1.1 qualifies a welder to weld in the flat, horizontal, and vertical positions on plate. Shops often pair it with a 4G overhead test to expand qualification, and pipe tests use separate designations such as 5G and 5A.

How do I prevent porosity in vertical stick welds?

Porosity is most often caused by an arc that is too long, a damp or contaminated electrode, or dirty base metal. Keep a short arc, store 7018 rods in a rod oven or sealed container, and grind away mill scale, oil, and rust before striking the arc.