Hi there...
Im about to lay 12sqM of screed in a small extension and Im not sure whether to use DPM or not.
I suspect my hesitance could be as a result of working on a building site nearly 10yrs ago, the screeders used DPM but I think this may of been specifically because of block & beam floors... but wanted to ask the question to be sure.
The floor on my extension is a concrete over site, 150mm (with 142mesh) on 75mm of insulation board on 1200DPM (sand & hardcore beneath). The concrete is tamped to DPC level and I need a 50mm bonded screed to get up to floor level in the house.
The bricklayer cut the DPM level with the house DPC. Do I need to lay the screed directly on the concrete slab or do I need to lay another sheet of DPM before I lay the 50mm screed??
Thanks, Al.
Im about to lay 12sqM of screed in a small extension and Im not sure whether to use DPM or not.
I suspect my hesitance could be as a result of working on a building site nearly 10yrs ago, the screeders used DPM but I think this may of been specifically because of block & beam floors... but wanted to ask the question to be sure.
The floor on my extension is a concrete over site, 150mm (with 142mesh) on 75mm of insulation board on 1200DPM (sand & hardcore beneath). The concrete is tamped to DPC level and I need a 50mm bonded screed to get up to floor level in the house.
The bricklayer cut the DPM level with the house DPC. Do I need to lay the screed directly on the concrete slab or do I need to lay another sheet of DPM before I lay the 50mm screed??
Thanks, Al.