Loft insulation
Discussion
For obvious reasons I am looking at our loft insulation which is a bit lacking. Half of the loft isn’t easily accessible so I’ll just use the normal insulation.
The other half is used for storage down the middle, so I am thinking of using celotex/kingspan type PIR board between the joists, so I can then put boards over the top. Then keep the normal wool type along the sides.
Any draw backs to this? Thinking PIR board under storage boarding as it has higher R rating for a given thickness so easier to maintain under the boards.
Will the PIR boards need air gaps? Between the ceiling below and or the boards on top?
The other half is used for storage down the middle, so I am thinking of using celotex/kingspan type PIR board between the joists, so I can then put boards over the top. Then keep the normal wool type along the sides.
Any draw backs to this? Thinking PIR board under storage boarding as it has higher R rating for a given thickness so easier to maintain under the boards.
Will the PIR boards need air gaps? Between the ceiling below and or the boards on top?
Evoluzione said:
No air gaps needed. It'll be very time consuming.
You may want to Google 'electric cable near pir insulation' and have a good read.
I'd consider elevating the deck up permanently and using glasswool.
Ah I’d not considered that…. You may want to Google 'electric cable near pir insulation' and have a good read.
I'd consider elevating the deck up permanently and using glasswool.
On the time consuming, I hadn’t realised how important a tight fit is with PIR…. All things considered it does sound like it’s better all round to raise the floor and stick with the woolly stuff.
Gassing Station | Homes, Gardens and DIY | Top of Page | What's New | My Stuff