Adding a cavity wall?

[Boxerman]

Potentially stupid question.............................can you add a secondary 'cavity' wall to a single elevation of a solid wall constructed house.

I ask as the rear of my house is really exposed to the elements and I get water ingress even though I've had the house re-rendered and it's driving me insane !!!

 

[noseall]

yes you can, either inside or out.

could be a lot of work though.

 

[Nige F]

consider a Tanking /pump system like used in cellars ....internal OR tile/slate hanging "Sussex style"......external

 

[^woody^]

The most practical option would be to dryline, and insulate with celotex or similar. No need for a cavity at all.

No new foundations required, and the wall gets insulated too - to the equivalent of a modern cavity one too if you like