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Insight Horizon Media

What is a dry lining back box?

Author

Emma Martin

Published Feb 24, 2026

What is a dry lining back box?

A dry lining back box is designed for use within a plasterboard wall or ceiling and sits flush against the surface to provide a sleek finish. With integral lugs to keep the intended wiring device secured in place, plasterboard back boxes are quick and simple to install with just a few basic tools.

What is depth of back box?

When considering what depth Back Box to use, the general rule is to use a 3.5″ box for stations with 3 or more connectors. (This is a change from the previous standard of 3.5″ boxes for 4 connector boxes.) This will be reflected in the standard drawings.

What wall plugs do I need for plasterboard?

Rawl plugs for plasterboard are designed to expand or pull back from the other side of the hollow substrate when the screw is inserted to help distribute your hanging load. As they are supplied with anti rotation capabilities this helps to support the grip of the fixing.

How deep is a socket back box?

may fall into the backbox. When chasing out your hole for the backbox, have a box handy for checking the depth every so often. Boxes for sockets are 25mm deep, and typically 16mm deep for lightswitches.

Can I use plastic back box in wall?

Different Types and Sizes of Plastic Back Box Essentially it works the same way as a metal back box and is recessed into the walls surface allowing the socket or switch face plate to fit flush with the walls surface.

Does a socket need a back box?

You must have a back box. Just use a Patress box, you can fit a socket with a bit of a squeeze into a 25mm patress (Somtimes called surface box) however your choice of flat socket requires a larger back box.

Do you need to earth a back box?

A metal back box for a socket would be classed as an exposed-conductive part and as such it needs to be earthed. This is because of the metal strip that is on the back of the socket that links the earth terminal to the fixing holes to the metal back box fixed lug via the metal 3.5mm screw.

What is a dry wall socket box?

Dry wall socket boxes are a joy to work with and as you tighten the face plate onto the socket, or patress, box the box grips the plasterboard tighter. The same method is used for switch boxes as socket boxes.

Where can I buy a dry lining back box?

Dry Lining Back Boxes | Plasterboard Back Boxes | Screwfix.com Buy Dry Lining Back Boxes at Screwfix.com. For installation in plasterboard. Provides a sleek, flush finish. Simple to fit. Hundreds of stores nationwide.

What type of socket box do I need for plasterboard?

Proprietary plasterboard, or Dry wall, socket boxes are available which simply clip into place when the hole is cut for them. Dry wall socket boxes are a joy to work with and as you tighten the face plate onto the socket, or patress, box the box grips the plasterboard tighter.