Does anyone know if loft and cavity wall insulation degrades or requires renewing/topping up to maintain it's effectiveness?
Cheers
I wouldnt have thought Rockwool would degrade.
Dont know about the sprayable cavity stuff though...
QUOTE - Nomad - Member
Does anyone know if loft and cavity wall insulation degrades or requires renewing/topping up to maintain it's effectiveness?
Hi There,
Yes it will degrade (shrink) over time, 8-12yrs or so and it's recommended that it be topped up to a thickness of 270mm. Don't pack it tight in corners or small spaces like the eaves. No idea about cavity wall insulation though. Sorry
Carl
Cavity wall insulation comes with a 25year guaruntee if that is of any use to you.
Don't know how you can tell if it is still as effective as when it was initially installed.