loft insulation - 300mm ish.. between joists..how?

[alan131]

Hi. I have a loft which has joists with gaps between about 300mm a few a little more maybe 310. I need to insulate cheaply as possible to 100mm.

All the standard roll insulation i can find is 1140 wide. Apart from discarding the last 240, or fiddling about to cut and fit two strips together to make 300, is there another way?

A forum search turned up a topic from about 6 years ago which said 600mm roll was available and i actually have one roll left over from years ago 1200mm wide but i cant find a current supplier.

Must be loads of houses with joists on 14'' centres - i must be missing something!

Very grateful for any help recieved.

 

[catlad]

That type of insulation does n't go between the rafters, Google multi foil insulation for a better solution.

 

[alan131]

Sorry I was being an idiot. I'm insulating between ceiling joists in the loft. Sorry, really tired atm and well, what can i say. It was only contemplating foil that i realised my error

 

[catlad]

I too am tired and misread your post, The place were I get my insulation offers a split or a non split roll. The split roll is perforated so that it is easily split into three 16" sections.

 

[alan131]

Any tips on getting the best 300mm wide use out of it please? I imagine cutting a 60 mm fill strip will be a pain.....

 

[IJWS15]

Any tips on getting the best 300mm wide use out of it please? I imagine cutting a 60 mm fill strip will be a pain.....

This works wiith rockwool . . .

BEFORE unwrapping use a panel saw to cut the roll to the width you need like slicing swiss roll.

Fit as normal.