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Shared welding bays need more than a visual divider. A suitable curtain limits arc flash, reduces ultraviolet exposure to nearby workers, contains sparks, and gives each welder a defined work area. It does not replace a welding helmet, safety glasses, fire-resistant clothing, or ventilation. The right choice depends on the welding processes in the bay, the distance to other workers, and how often the divider will be moved.
What a welding curtain must do
Welding curtains are primarily an optical and spark-control barrier. They reduce the direct and reflected ultraviolet and infrared radiation produced by MIG, TIG, and stick welding. They also help stop small sparks and grinding debris from crossing into the next bay. They are not a sealed fire wall, and they should not be used to enclose flammable vapors or combustible dust.
Choose curtains specifically sold for welding, not ordinary vinyl shower curtains, tarps, or clear construction sheeting. General-purpose plastic can melt, burn, or transmit dangerous arc radiation. Look for a stated welding-curtain use, a flame-resistant or self-extinguishing specification, and an appropriate shade rating. The curtain’s rating is not a substitute for the lens shade in a welding helmet.
Choose the right curtain material
Flexible PVC is the common low-cost option. It is easy to wipe clean, available in many sizes, and works well for a permanent bay divider where the curtain will not be dragged over sharp steel. It can become stiff in cold shops and may tear around grommets after repeated handling. Some PVC products also soften or deform when exposed to hot spatter.
Woven fiberglass or coated fiberglass curtains cost more, but they are generally the better choice near frequent stick welding, heavy MIG work, or grinding. They tolerate heat and occasional sparks better than thin PVC. The trade-off is lower visibility, a rougher surface that collects dirt, and greater difficulty cleaning oil or metal dust.
Clear welding curtains are useful when supervisors or nearby workers need to see into the bay, but “clear” does not mean unfiltered. Buy a clear product with a stated welding shade or optical protection rating. Darker curtains provide more visual separation and reduce stray arc light, while lighter curtains make the shop feel less closed in. Never use a clear curtain with no published welding protection information.
For a typical shared bay, compare flame-resistant welding PVC curtains with fiberglass before buying. The cheaper PVC option is fine for occasional light-duty TIG or MIG work when it is mounted away from the arc and replaced at the first sign of melting or damage.
Shade, coverage, and mounting height
A curtain should block line of sight to the arc from normal standing and seated positions. In most shops, a 6-foot curtain is the minimum practical height, while 7- or 8-foot curtains provide better protection around benches and welding tables. Leave enough clearance for ventilation, but do not leave a large open gap at eye level between adjacent panels.
Make the divider wide enough to cover the entire bay opening with overlap. Two curtains that meet edge-to-edge will separate poorly once air movement or equipment traffic pulls them apart. A 6- to 12-inch overlap is useful, especially at corners and entrances. If the curtain is hung from a track, allow enough extra width for folds; a panel installed completely flat may not slide properly.
| Use case | Practical choice | Main trade-off |
|---|---|---|
| Occasional TIG or light MIG | Flame-resistant PVC, 6–7 feet high | Lowest cost, but more vulnerable to hot spatter |
| Daily MIG or stick welding | Heavy PVC or coated fiberglass, 7–8 feet high | Better durability, higher purchase price |
| Welding beside grinding or fabrication | Fiberglass curtain with a reinforced lower edge | Handles abuse better, but is less transparent |
| Mobile work areas | Welding screen on a locking steel frame | Fast to reposition, but takes floor space |
Fixed curtains versus portable screens
A ceiling-mounted track is best when bay locations are permanent. It keeps the floor clear, makes the curtain easy to open, and allows several panels to overlap. Use metal rollers and hardware rated for the curtain’s weight. Lightweight consumer curtain rods can bend or pull out of the wall when a heavy panel catches on a cart.
Portable screens are better for shops that change layouts or use one large welding area for occasional jobs. Look for wide feet, locking casters, and a frame that does not wobble when the curtain is moved. A screen that tips toward a welding table is a serious hazard. If you need a portable setup, a portable welding screen with casters is usually more useful than building a lightweight wood frame.
Do not make the curtain airtight. Welding fumes still need source capture or general exhaust, and a fully enclosed bay can interfere with airflow. Keep the lower edge several inches off the floor if that improves ventilation, but account for sparks and foot traffic. In high-spatter work, a closer-to-floor fit may be worthwhile if the material and local fire-safety requirements permit it.
Installation and fire safety
Keep curtains at least several feet from the arc when possible. The closer the material is to the weld, the more likely it is to collect hot spatter, melt, or develop pinholes. Place a noncombustible welding blanket over nearby gaps or equipment rather than relying on a curtain to protect a plastic toolbox, cardboard stock, or solvent container.
Inspect the curtain before every shift. Look for burn holes, brittle sections, melted edges, loose grommets, and darkened areas that indicate repeated heat exposure. A small pinhole can admit a concentrated arc flash directly into the next bay. Replace damaged panels instead of taping them with ordinary duct tape, which can melt or ignite.
Keep a suitable fire extinguisher accessible, remove combustible materials from both sides of the divider, and follow the shop’s hot-work permit and fire-watch rules. For curtains near frequent grinding, a heavy-duty fiberglass welding blanket can protect the lower section, but it is not a reason to skip inspection.
Buying checklist
Before ordering, measure the opening, ceiling height, track length, and available floor clearance. Confirm the material, dimensions, shade or optical rating, flame-resistance information, grommet spacing, and included hardware. For shared bays, prioritize full coverage and easy replacement over an unusually cheap panel. A curtain that is difficult to move will be left open; a thin curtain that burns through will provide protection only until the first serious job.