Thanks Sean, I know I am breaking all the rules regarding DPC's. I am putting in some folding sliding doors to the outside of the house and wanted the inside to be flush with the outside. Is this a complete no go or are there any solutions.
Well not really a complete no no; it depends how you do it. I also have folding sliding doors going outside, but mine go out onto a wide step (see main site for info re steps and DPC) so the effect is that the levels remain the same as you move out. However, the step goes down on to the patio and it is 150 below DPC.
red-star wrote:I have put my driveway in above DPC I think it will be ok, if not I will have the wall pumped above to create a new DPC, do no comprimise design!
chemical dpc is very hit and miss. you will undoubtably have regrets when the damp penetrates 150mm is a minimum figure and should not be compromised imho:rock:
general builder, maintenance engineer, gas and plumbing installations, extensions etc
Paving may come up to dpc height at a threshold to provide a level entry for disabled access, but elsewhere it should be kept a minimum of 150mm below dpc (Building Regs Part C).
Paving shuld never, ever be laid to a level above dpc unless there is some form of tanking/waterproofing used.
150mm is a minimum figure and should not be compromised imho:rock: