Hi,
I’ve read through so many posts on this subject, but I can’t seem to find the answers I need – sorry!
Here are the basic facts…
My loft joists are ~70mm deep, ~32mm wide.
My current loft insulation is approx 100mm deep.
My house was built in 1998 and has a trussed roof.
I want to increase my insulation to the recommended 270mm and board the loft for light storage at the same time.
I know I need to cross batten in order to do this but have a couple of questions/concerns…
If I simply put the cross battens on top of the joists, the insulation will be compacted to 70mm, do I need to increase the height of the joists by 30mm? If I do, is it better to use one long piece of wood or small blocks at the appropriate intervals?
Assuming the 100mm existing insulation is fully usable, I could then top up the additional 270mm using appropriate carcassing timber. I am concerned about the additional weight of the additional cross battening timber and chipboard, should I be?
Access to the loft would be infrequent (6 times a year at most).
Thanks in advance
I’ve read through so many posts on this subject, but I can’t seem to find the answers I need – sorry!
Here are the basic facts…
My loft joists are ~70mm deep, ~32mm wide.
My current loft insulation is approx 100mm deep.
My house was built in 1998 and has a trussed roof.
I want to increase my insulation to the recommended 270mm and board the loft for light storage at the same time.
I know I need to cross batten in order to do this but have a couple of questions/concerns…
If I simply put the cross battens on top of the joists, the insulation will be compacted to 70mm, do I need to increase the height of the joists by 30mm? If I do, is it better to use one long piece of wood or small blocks at the appropriate intervals?
Assuming the 100mm existing insulation is fully usable, I could then top up the additional 270mm using appropriate carcassing timber. I am concerned about the additional weight of the additional cross battening timber and chipboard, should I be?
Access to the loft would be infrequent (6 times a year at most).
Thanks in advance