Depth of damp proof membranes in concrete floor?

[fury84]

I’ve recently bought a new house and my next task is to tidy up the heating pipe work. My house has solid concrete floors and I plan on burying the pipe using Hep2o pipe in pipe and their conduit junction boxes where necessary.

My only concern is the junction boxes are 75mm deep and I am worried I might pierce my damp proof membrane channelling down that far.

My house was built in 1970 so anyone have any ideas how far down the damp proofing might be?

Also what would happen if I pierced it, could it be repaired easily?

Thanks in advance for your help.

 

[mater]

normally 100mm down to the dpc, easy to repair if you go through it.

 

[fury84]

normally 100mm down to the dpc, easy to repair if you go through it.

Fantastic so I should be fine no matter what happens - thanks.

 

[Chukka63]

probably 50mm of cement/screed first

 

[fury84]

probably 50mm of cement/screed first

Is that in addition to the 100mm mater mentioned?

 

[mater]

yes that would be if there is a screed there

 

[noseall]

If the membrane is foil-like in appearance and is woven with nylon fibres then it is a gas membrane.

This you will definitely want to repair.

 

[fury84]

yes that would be if there is a screed there

Thanks

If the membrane is foil-like in appearance and is woven with nylon fibres then it is a gas membrane.

This you will definitely want to repair.

I'm hoping I won't be going deep enough to find out!!!