Cutting of Penetrations

When measuring and marking for cut-outs around power outlet boxes etc, ensure enough clearance is given for the switch body and that the cover plates or bulkhead fittings will cover the finished cut-outs.

In wet areas, use an approved sealer to seal the edge and a 50mm perimeter of the painted side of any penetration (see Shower Lining Detail).

De-bur the edge with 100-grit sandpaper.