Hi, i'm having an extension built in the banking at the side of the house. The banking will be the full height of the extension and will have a green roof
1. How far into the banking should I excavate beyond the actual building line to give me room for the drains and maybe an extra damp-proofing skin?
2. How deep will the foundations need to be?
3. How thick will the retaining wall need to be?
Hope you can help, really worried about the cost, cheers
1. How far into the banking should I excavate beyond the actual building line to give me room for the drains and maybe an extra damp-proofing skin?
2. How deep will the foundations need to be?
3. How thick will the retaining wall need to be?
Hope you can help, really worried about the cost, cheers