"Darren Cooper" wrote in message
...
Hello,

I have 4" roof joists and 4" of insulation in my loft and I want to make
it
either 8" or 10" of insulation. Some of the loft is floor-boarded and I'd
like to floor more for storage etc, do I lay the extra 4" of insulation
in-between the joists and squeeze it in with the loft board or is it not
possible to board over the extra thick insulation?

TIA,

Darren


Compressing the insulation will negate its effect.
If you want to board over an area, start by laying a second layer of 4"
joists at right angles to the exisitng ones and fill the gaps with the extra
insulation. Then lay the boards on top.

Bob