Damp proof membranes and Radon Barriers

sas

Can\Does the radon barrier double as the damp proof membrane in a house?

Following on from that, What is the correct ordering of floor contruction layers when installing under floor heating?

e.g.

1. Soil
2. Compacted hardcore
3. Sand blinding
4. Radon Barrier\Damp proof membrane
5. Concrete slab
6. Floor insulation
7. Floor screed

Thanks

SAS

Mellor

Yes, a radon barrier can double as a DPM. (bare in mind that it doesn't work the other way)

The build up you suggested above it also common. But there are variations also. Such as insulation below the slab and no screed etc

sunnysoutheast

well, almost:

1. Soil
2. Compacted hardcore
3. Sand blinding
4. Radon Barrier\Damp proof membrane
5. Concrete slab
6. Floor insulation (we used 100mm TF)
6a. Perimeter insulation (we used 60mm)
6b. Heavy gauge polythene or pipe holders etc. (according to UFH specs.)
6c. UFH pipes
7. Floor screed

There is another way of doing it which is basically pipes UNDER the slab. I think the disadvantages of this are a) it has a longer response time and b) you're putting your insulation, pipes etc. in without a roof covering.

I believe the radon barrier acts as the damp course. Don't forget the sump if needed. I'll get all technical now and tell you ours is yellow.

SSE

sas

sunnysoutheast wrote: »

well, almost:

6. Floor insulation (we used 100mm TF)
6a. Perimeter insulation (we used 60mm)
6b. Heavy gauge polythene or pipe holders etc. (according to UFH specs.)
6c. UFH pipes

... I'll get all technical now and tell you ours is yellow.

SSE

Great stuff, thanks for the clarification guys.

The UFH pipes would be a good idea alright

I'll try and be equally technical and say that the one I've seen is red.

ircoha

this may help
http://www.planningportal.gov.uk/uploads/br/masonry_cavity_wall_insulation_illustrations.pdf
more at
http://www.planningportal.gov.uk/england/professionals/en/1115314255826.html