Hi Forumites,
I have a granny flat I'd like to get council approved. My concern is that there may not be a waterproof membrane under the concrete slab.
Is there any way to add a waterproof membrane? Can I keep the granny flat and jackhammer the concrete and pour new concrete over a membrane?
Or do I have to knock down and rebuild?
Thanks,
Crystal
I have a granny flat I'd like to get council approved. My concern is that there may not be a waterproof membrane under the concrete slab.
Is there any way to add a waterproof membrane? Can I keep the granny flat and jackhammer the concrete and pour new concrete over a membrane?
Or do I have to knock down and rebuild?
Thanks,
Crystal