proof

We're having a new patio installed and the builders are doing a great job. However, I'm concerned to see the new level is only 120 mm below the damp proof course in places. The new level also comes about an inch above the bottom of an air brick which doesn't look right and I suppose could...

A gallon of Sikha, spread in 2 coats (5x4m room). Regs told me to run a membrane along the base of and up the inside of the blockwork wall before the stud went on. Am putting down a CLS plus 18mm ply substrate, then 8mm click vinyl. Do I really need to continue the membrane across the whole...

I'd like to use a soundproof plasterboard on this ceiling, what thickness do I need? It's just going to be a ground floor bedroom. What additional measures are necessary to make the use of a soundproof plasterboard effective?