Building off damp proof liquid membrane

[Vijay]

Is it OK to build blocks off damp proof liquid membrane? I think I was once told it's ok and you throw sand in the second coat of the stuff?

 

Cheers

 

Vijay

[Mr Punter]

As long as it has manufacturers accreditation (BBA etc) for this there is no problem.

[PeterW]

Any reason you want to use this rather than DPC..??? The mortar below needs to be dry so you will be waiting a week before you can paint it on - and the blocks need to be dry too..! 

[Russell griffiths]

Basically as you said blind it with sharp sand to make it rough and gritty. 

 

It will have better adhesion than some of the nasty pvc damp courses. 

 

[Vijay]

4 hours ago, PeterW said:

Any reason you want to use this rather than DPC..??? The mortar below needs to be dry so you will be waiting a week before you can paint it on - and the blocks need to be dry too..! 

 

I've put DPC under the floor beams but wanted to have another slightly higher up too where the radon/DPM will be. I'm not 100% happy with the DPC under the beams as when moving them into position, there's every chance they may be scratched/scored - so I'd rather be 100% happy. I may use both a normal DPC and liquid

[Mr Punter]

Unless you are building over a swamp you are being paranoid unnecessarily cautious.

[Vijay]

10 hours ago, Mr Punter said:

Unless you are building over a swamp you are being paranoid unnecessarily cautious.

 

That probably wouldn't be the first time that's been said to me ?