by thedoctor »
Fri Apr 13, 2007 8:18 pm
Using frame crapms or ties to bond brickwork is acceptable its just not very pretty to have a straight joint. Toothing out is the best job but not necessarily any stronger. The easiest way to tooth out in hard mortar is shown in our removing a damaged brick project and involves drilling lots of holes to get the joint out. The plasterboard over the opening should really have some insulation between the back of it and the cavity. There should not be a damp problem but the cold air in the cavity can cause a cold surface on the plasterboard which could well be prone to condensation, especially in a kitchen, even with tiles on.
Tiling over plasterboard is perfectly OK. When the tiles are laid properly, and the grouting done well they are completely watertight and should give you no problems. The only thing we would say was not really up to scratch is the insulation on the back of the board which should not take long to rectify.