I am installing concretes porches in the front and rear of my home to replace wooden decks. The front exterior wall is stone and the new porch would extend up over the stone wall at the bottom. Should the stone be removed to have a straight edge flush against wall, or is it ok to pour against the stone wall (bedding them into the porch)?
What would you recommend as the process for both?
Best Answer
I agree with Tyler Durdens advice,with one important addition. Don't lay your patio directly on gravel. Assuming your patio is about 75-100mm deep, gravel on its own will not offer enough support, and eventually, cracks will appear due to subsidence. A much better solution would be to "layer" your foundation in order of aggregate size. Lay a layer (or two) of large stones,followed by a layer (or two) of medium stones, DON'T FORGET TO TAMP THEM DOWN!!!!, followed with a layer of sharp sand,tamp down again,then gravel(tamp),then patio.