How to Repair Plasterboard (Gypsum Board) :: Home Improvement DIY

Surface damage and small holes in plasterboard can be repaired in the same way as cracks and holes in solid plaster, but if a large hole has been punched in the material ? by a door handle, say ? a different solution is required. In this case, a patch must be placed behind the hole to provide support for a layer of filler.

First use a padsaw to open out the hole, squaring the sides. Then cut a section of fresh plasterboard to a length slightly less than the diagonal dimension of the hole. This will allow you to pass it through the hole at an angle. Drill a tiny hole in the middle of the plasterboard patch and insert a piece of knotted string through it before adding filler or coving (crown molding) adhesive to the edges on the grey side of the plasterboard. This will secure it firmly to the back of the existing plasterboard panel.

Pass the patch through the hole and pull it back against the edges. Hold the string taut while adding filler to the hole, then leave this to set. Cut off the projecting string and make good with a final smooth coat of general-purpose filler or finish plaster, ensuring the surface is level.

Source: http://homeimprovementdiy.info/how-to-repair-plasterboard-gypsum-board/

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