knauf space board insulation, on top of chipboard??

allan673

hi, i have 100mm of loft insulation down at present.
then a third is chipboarded over for storage.
question is can space board go on top of chipboard at all and still insulate well.
other option is to take all the chipboard up and just recover all the loft with 170mm thick insulation.
i dont use the loft for storage, the chipboard was already down when i moved in.
seen as spaceboard is expensive should i just remove chipboard and put new 170mm insulation on top of the existing insulation??

cheers
p.s ive seen the npower offer already - cant seem to order though, either by phone or internet??

Kiran

Yes on both counts really. Spaceboards can go over the existing boarding, its one of their selling points I believe. You are also correct, about puttung down a further 170mm being a better option as building regs do not recongnise all the different types of insulation you can use and certainly not used in combinations of types.

It should also be cheaper and easier to do.

HTH

andrew-b

If i were you i'd leave the chipboard down and chuck the 170mm insulation on top. The chipboard in between will make little difference. Got a similar issue to decide myself when i finally get to laying our insulation but we actually use that area for storage. I might jack the boarded area up on extra timbers though. The knauf board looks good but it is pretty expensive stuff.

Andy

allan673

i agree it is expensive isnt it.
might take most of the chipboard up and just have a small area for storage should i need it.

27col

I it was mine, I would be taking the chipboard up. Provided it was not too firmly fixed. The then lay the 170mm. Much cheaper then space board, especially if you do not want the space for storage.