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yes its cavity wall Builder states he did everything right screed concrete dpm insulation rubble obviously I cant guarantee that it was all sealed properly He states its due to all the wet earth outside, and thats why he dug out the soil and put in the shingle. next step?

No leaking pipes, water is coming in from outside Im sure, does this mean a gap between DPC and DPM and how can it be rectified?. Will building control stop the sign off because of it.

two damp corners on new extension, concrete floor. Tried digging out soil and replacing this with pea shingle around corners to improve drainage and dry wall and floor out. Now pea shingle wet and floor damper, is the pea shingle drawing more water out of soil and wetting wall more?. Whats...

new extension concrete floor 8 weeks ago screed 2 weeks ago heated 1 week still damp in 2 corners - small droplets water can dry with hot air gun but returns next day normal? or damp proofing fault?

the lead sheet association say that drips between sections should be at least 50mm, mine is 18mm, this combined with water pooling could be the problem? would the best thing to do be fibreglassing the lot (8m x 1m), and selling the lead

just had a lead valley start to leak on a new roof (2 weeks old). Obviously will get roofer back. The lead overlaps are not soldered and the water seems to be tracking back under the these joints. Is it normal practice to solder the joints?. If not what is the best stuff to seal the...

Whats the best cable to wire outside lights. 30cm outside, most in loft and then under floor. Appreciate Part P, extension build in progress. Is Artic cable OK

Is the 2.5mm ring main room size of 100m2 a guide or a "law". Can the floor size be increased if 4mm T+E were used? thanks