£ 470 is a fair quote for 2 men 2 days, a good slab layer would easy lay over 80 slabs a day you have 65 to lay but the contractor has to lift and clean them prior to relaying and cart in sand.
Hi Just completed an extension using windposts which were 90mmx90mm box section posts, because you only 50mm cavity you would be better off oncorporating in the inner skin. The windposts are fixed to the foundations to give the bearing wall more support not the lintel. You also need design and calcs...
Hi The method I used for my barn was build off the "sub floor" using 4" celon blocks (plasterboard and skim) for non load bearing walls, 1200 gauge polythene, 100mm celotex, very thin layer of polythene stapled and taped to seal against wall, lay exspansion strip around perineter, lay...
lift the tarmac should be around 75mm in depth, do a few trial pits with a shovel to check the depth of the exiting hardcore if you have 150-200mm that will suffice.
top the stone up, wack it leaving about 30mm for shingle.
Install a 225x75mm spliter/binder under the existing joist's half way along in the opposite direction.Knock out and sit on inside skin 100mm bearing.Rap the ends with dpm and allow a void under the new joist.
•If the fence, wall or gate, is next to a highway used for vehicles (a footpath is part of the highway) - over 1m height requires permission.
•Where it is not next to a highway, any fence gate or wall over 2m will require permission.
Just finished a raft/ringbeam 6x6 garage oversite, structural designed by professionals total dig depth 1.6m (very soft clay)
Price £8.2k supply and fix
