Hi All
We have built our ground floor walls of a 2 story extension and are about to fit the wall plate. Our walls are made of 215mm blocks. We have noticed that when other extensions are built using cavity walls that the inner wall is higher that the outer wall thus allowing for roof timbers. This is not so with our blocks, they are level and we are wondering have we done something wrong?
when the wall plate goes on top of the wall it will raise the inner part of block by 3 inches but will this be enough height for the roof timbers.
Also our architect has specified 50 x 75 wall plate and we are now wondering if that has anything to do with it.
Also our 1st floor joists are supported across an rsj and finish across tops of where the wall plate is to be placed, at the moment the joist are uncut and are protruding past the external side of the wall, we are not sure where to cut the joists? do they butt up to the wall plate? do they sit on top of wall plate and if so by how much?
BC has said that wall plate is held down with morter and straps are conected to the wall and joists, not the plate!!! we find that strange so will be adding straps onto wall and plate as well.
Thanks for any advice
Nelliedee
We have built our ground floor walls of a 2 story extension and are about to fit the wall plate. Our walls are made of 215mm blocks. We have noticed that when other extensions are built using cavity walls that the inner wall is higher that the outer wall thus allowing for roof timbers. This is not so with our blocks, they are level and we are wondering have we done something wrong?
when the wall plate goes on top of the wall it will raise the inner part of block by 3 inches but will this be enough height for the roof timbers.
Also our architect has specified 50 x 75 wall plate and we are now wondering if that has anything to do with it.
Also our 1st floor joists are supported across an rsj and finish across tops of where the wall plate is to be placed, at the moment the joist are uncut and are protruding past the external side of the wall, we are not sure where to cut the joists? do they butt up to the wall plate? do they sit on top of wall plate and if so by how much?
BC has said that wall plate is held down with morter and straps are conected to the wall and joists, not the plate!!! we find that strange so will be adding straps onto wall and plate as well.
Thanks for any advice
Nelliedee