Hi,
I am about to put down my new floor joists in between the original ceiling joists. Guidance diagrams I have seen from swansea BCO show A1 category loft insulation laid in the original 400mm gap between ceiling joists first, and nailed battens securing this to the ceiling joist - so their is no chance of fire ingress from downstairs. The new joists are suspended inbetween the old ceiling joistts, raised about 30mm to stop deflection cracking the ceiling.
my question is - is the battening totally necessary? could i run the inulation across the joists, overlaped? I really cant face all the extra work the battening will require - and i wont be able to use precut insulation, as i will need an excess to run up each side of the ceiling joists.
what have others found to be acceptable to BCO?
Reason for not applying for regs? my wife refuses to have stairs to this room - so no matter how well I buid the thing - it can't pass! My plan is to do everything as per the regs and the next owner then has the choice. The windows are in as per regs, so is the roof and insulation, now it comes to the floor...
many thanks
philip