I want to put some decking down outside the back of my house however from reading around the recommendations are to put it at least 2 brick levels below the damp course.
Currently the area that i'm looking at is covered in concrete which comes up to 2 brick levels below the damp course so the only way i could keep within regs is to break up the concrete and dig down (would need to dig down about a foot).
Instead of attaching the decking to the back wall i'm thinking of installing it freestanding slightly away from the back wall. What clearance do i need to leave from the house in order to stop the rain splashing up against the back wall?? also would it be ok to add an inch of gravel between the decking and the back wall to make it look nicer or would this create a water trap? i.e. nowhere for the water to drain 'cos of the concrete or could it run off under the decking?
Also would it be ok to set the decking flat on the concrete or would it be better to dig a few holes and create some concrete supports for the posts? Is there a minimum clearance required for the joists from the concrete floor??
oooh so many questions!!!
cheers in advance Jt