sloping

Am getting my meters moved. 500 thk wall - made up of 100 conc. block, 50 void, 350 breeze. re the 38mm hole that takes the gas pipe (in a plastic duct) from the proposed wall mounted meter cab to a ground floor bathroom. Does this hole have to be drilled level? Or can it be drilled to falls...

Hi all Hope to obtain some advice on the following: In our first floor flat the kitchen floor is quite uneven and has a slope. The height difference between one end and the other is 2". The surface is concrete and has some cracks in the middle. We've investigated by removing some concrete and...