I am about to lay a large drive/ patio area using a combination of bradstone cobbles, paving and some old sleepers. At present the area to be paved is a mixture of concrete and tarmac surface from when the property used to be used as an industrial premises. Under the surface there is a mixture of soil and waste drainage pipes and I do not want to dig the current base up.
This would normally provide an excellent base to lay a dry sand/cement sub-base on and then the slabs on BUT the damp proof course of the house is already at best 2 brick height and in places only 1 brick height over the existing surface.
I anticipate that the paved area would add an additional 10cm / 4 inches and so rise above the damp proof course which is not ideal.
My question is this - is there any tar like substance or any other method of extending the damp proof course on the outside of the brickwork so that I am able to lay the paving up to the brickwork without causing the bricks to go damp.
If not what gap do I need to leave between the wall and the raised new paved area and is it possible to fill this gap with gravel or some form of drain/gulley?
I look forward to your wise words!!!!
Damp proof course too low!
-
84-1093879891
You can't extend a dpc, as far as I know. Tanking is often used to minimise/eliminate damp problems in such situations, but it's not, technically, a dpc.
The usual 'remedy' for this sort of problem is to use a 'dry channel' arrangement, as illustrated on the Dealing with DPCs page. It's a lot cheaper and a lot easier than tanking!
The usual 'remedy' for this sort of problem is to use a 'dry channel' arrangement, as illustrated on the Dealing with DPCs page. It's a lot cheaper and a lot easier than tanking!