Access Door Selection Guide

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An access door looks like a simple product until you have to pick one. The right panel depends on whether the assembly is fire rated, whether it goes in a wall or a ceiling, what the surrounding finish is, and what the space is exposed to. Choose wrong and you may void a fire rating, fight corrosion, or end up with a panel that shows every seam. This guide walks through each decision and points you to the models we stock — from standard and fire rated access panels to hidden frame doors, valve boxes, and roof hatches.

Our four most requested models

Choose in six questions

1. Is the wall or ceiling fire rated? If yes, you need a labeled fire rated access door. A non-rated panel in a rated assembly breaks the rating. Go to the fire rated comparison.
2. Wall or ceiling? Most non-rated panels work in either. In a rated assembly, only an insulated, temperature rise rated door like the PFI can go in a ceiling. A non-insulated PFN is walls only.
3. What is the surface? Choose the flange or frame style that suits the finish — exposed flange for any material, drywall bead flange for taped and finished drywall, hidden frame or recessed door for the cleanest look, or GFRG for panels that disappear once painted.
4. What is the environment? Wet or corrosive areas call for aluminum or stainless steel. Clean rooms and labs need airtight and watertight construction. Secure areas need heavier gauge steel and a real lock.
5. Who should be able to open it? Screwdriver cam latches keep the public out at the lowest cost. Keyed cylinder locks, Allen key locks, and mortise cylinder slam latches restrict access further.
6. What size? Order by the clear door size. Most models need a rough opening of the door size plus 1/4″. Allow room to reach through — a panel that is too small to work through is the most common regret.

Fire rated access doors: PFI or PFN?

Both are labeled fire rated steel access doors with self-latching slam latches, continuous hinges, inside release, and automatic closers. The difference is insulation, and that difference decides where each one is allowed.

Why the PAL is all aluminum

When two different metals touch in the presence of moisture, one of them corrodes faster than it would on its own. This is galvanic corrosion, and it is why an "aluminum" access door built with a steel frame or a stainless steel hinge can start to fail in exactly the humid, wet, or exterior locations aluminum was chosen for. The PAL is built with an aluminum door, an aluminum frame, and an aluminum piano hinge, so there is no dissimilar metal contact to drive that reaction. It also comes standard with insulation to cut sound and air transfer, neoprene perimeter gasketing, and a cylinder cam lock with key — features that are extras on many competing panels.

Hidden frame access doors

Hidden frame doors are the cleanest looking non-rated access doors we sell. The frame and flange sit behind the door, so there is no visible 1″ flange and no outline around the panel — and unlike a drywall bead door, there is no taping or compound. The CTR installs in roughly half the time of a flush drywall bead or plaster door. All three are for non-fire rated walls and ceilings.

Valve box access doors

A valve box is a steel cabinet with a hidden frame door on the front. It sets into the wall, can be drilled on site for water pipes, gas pipes, and conduit, and gives shut-offs, valves, and meters a clean, finished enclosure — with no mud or plaster. We carry the BTA in two depths, plus a windowed version.

Roof hatch

Pick a door by application

Flange and frame styles

Latches and locks

Sizing and ordering tips

• Order by door size. Sizes listed are the clear door size. For most models the rough opening is the door size plus 1/4″ in each direction.
• Size for the work, not the pipe. Leave room to get hands, tools, and replacement parts through the opening. For anything a person must climb through, go 22″ x 30″ or larger and check local code.
• Width first, height second. Sizes read width by height. On the PFI and PFN, the hinge is on the second dimension — the height.
• Respect fire rated maximums. Rated doors keep their rating only up to a maximum size, and ceiling maximums are smaller than wall maximums. Check the product page before ordering an oversized rated panel.
• Gasketing is standard on the PAL, RAL, and ALN-GYP and an option on the AHD, AHD-SS, and CTR. Add it where you need to stop air, dust, or odor.
• Finish. Steel and aluminum panels ship powder coat primed, ready for finish paint by others. Stainless steel ships in a satin finish.
• Special sizes are available on many models. Custom and special order access doors cannot be canceled or returned once ordered.

Last updated September 23, 2026. Ratings, sizes, and construction details are taken from the specifications on each product page. Fire ratings apply only within each product's listed maximum sizes and installation conditions. Always confirm access door requirements with the project specifications and your authority having jurisdiction.