Plasterboard Access Panels

A plasterboard access panel is designed to be finished into the surface rather than fitted onto it. The door is a steel tray faced with plasterboard, and the frame carries a perforated beaded flange around its outer edge. That flange is the whole idea. Jointing compound and plaster push through the perforations and grip, so the frame becomes part of the board surface instead of sitting as a separate object on top of it.

Once the wall or ceiling has been taped, jointed and skimmed, and the door face has been finished to match, the panel reads as a section of the surface with a fine line around it. Decorate over it and, from normal viewing distance, most people will not find it. That is why this range gets specified for hallways, living spaces, reception areas and any ceiling where a visible metal hatch would look like an afterthought.

The trade off is that a plasterboard panel has to go in as part of the finishing sequence, before the surface is skimmed. Where a wall or ceiling is already decorated and access has to be cut into it now, a face fitted metal panel with a picture frame is the more practical retrofit, because it covers the cut edge with no plastering involved.

Almost every complaint about a plasterboard panel comes down to a hairline crack tracking around the frame a few months after the job finished. It is avoidable, and the method is the same one you already use on any board junction.

Treat the junction between the beaded flange and the plasterboard as a joint, not as an edge. Apply joint filler over the flange and bed scrim tape into it, so the tape bridges the change of material, then fill over the tape and let it set properly before the skim coat goes on. Skimming straight onto a bare flange gives you a hard line between steel and board with nothing to absorb movement, and that is the line that opens up later.

A few other habits pay for themselves:

• Fix the frame back to something solid so it cannot flex when the door is pushed.
• Keep filler out of the door gap and out of the lock.
• Let each coat dry rather than chasing the trowel.
• On a fire rated panel, follow the sealing instructions supplied with it, because the seals form part of the tested arrangement.

Our installation instructions set the sequence out step by step.

Every panel here uses a beaded frame, because that is what gives the keyed, finished edge. The choice comes down to door construction, fire rating and how closely the panel has to match your opening.

In a stud partition, fix the frame to the studs or to noggins added for the purpose, so the panel is supported on all four sides and nothing flexes when the door is opened. In a drylined solid wall, pack and fix the frame properly rather than relying on the boarding alone. In an MF ceiling, plan the panel position with the grid rather than against it, and add framing around the opening so the cut edges of the board are supported.

Be clear about what the panel is for. These are inspection and maintenance panels, giving access to valves, isolators, dampers, junction boxes and pipework so they can be seen, reached and worked on. They are not personnel access, and a ceiling panel is not a route into the void above. Nothing in this range is designed to take body weight, so if someone needs to get up into a roof space or a plant void, that calls for a different product entirely.

It is also worth agreeing panel positions with the mechanical and electrical contractor before the boarding goes up. A panel positioned to suit the ceiling grid rather than the valve behind it gets cut about later, which undoes the finish you specified the panel for in the first place.

The range covers standard square and rectangular sizes, plus circular panels and a made to measure route for anything outside that. Sizes are quoted as the panel size, and the opening is formed to suit the panel rather than the other way round, so check the figures given on the product page before anyone puts a knife into the board. Our access panel size guide explains how the sizes work across the ranges.

Locking and catch arrangements are listed against each product, so pick the one that matches how the panel will actually be used. A panel in a private house that is opened once a year has different requirements from one in a communal corridor that has to stay shut to anyone without a key.

For decorating, the panel takes the same treatment as the wall or ceiling around it once the skim has dried. Keep paint out of the door gap, the hinge and the lock so the door still releases cleanly afterwards. For specifiers, our NBS specifications carry the clause wording for these panels.