Insulation supply woes

[DragsterDriver]

I have 400mm centre 150x45 rafters.

 

I was planning on using 140mm frametherm with 50mm pir board below but frametherm is on Mega back order. Isover equivalent only comes at 590mm for 600mm centres

 

my walls are 600mm centre studs.

 

is actis hybris any good? I can get that for the rafters, really don’t fancy doing it all in pir board…

[Thorfun]

I used Isover 32 batts and worked perfectly for 600mm centre studs. ironically though in our house there aren't too many studs that are 600mm centres due to panel joins, extra studs for support of windows etc. so we ended up having to cut a lot of it anyway.

 

https://insulation-uk.com/products/isover-timber-frame-batt-32

 

this is the stuff we used. got it from Jewsons.

[Thorfun]

[Mr Punter]

3 hours ago, DragsterDriver said:

is actis hybris any good?

 

There is quite a lot of controversy about claimed u values for multi foil type products but my main concern for this would be flammability.  Even though flame should not penetrate your plasterboard I would not want to deal with an outbreak of fire in a concealed void.

 

Get a sample and hold a match under it.

[JohnMo]

Rockwool, Knauf and plenty others do something similar to frametherm.

 

Look at insulation hub, they tend to have good prices and normally free delivery.  Found what ever centres you have it all needs cutting.

[Iceverge]

4 hours ago, DragsterDriver said:

is actis hybris any good?