Best Insulation for New Build Timber Frame Wall (140mm)

[benben5555]

What insulation have people used in new build timber frame walls of 140mm depth. Looking to use mineral wool batts or roll. There seem to be a few options (Isolver / Rockwool) but none seem to be readily available on the internet. I want something that is easy to fit and effective.

 

Thanks

[SteamyTea]

Have a look at blown in cellulose insulation.

 

[JohnMo]

Knauf Frametherm 32, on a roll, easy to cut, self supporting. Makes it easy to get a gap free install.

 

Assume to get a decent U value, you have additional insulation going into the structure?

[ProDave]

+1 for Frametherm 32

 

But what else are you using?  140mm insulation in a timber frame is not enough on it's own.  So what else, external wall insulation, something over the inside of the frame?  It needs to be designed as a whole package.

[benben5555]

There is 50mm PIR going over the studs internally. Frametherm 32 is about £24/m2.

 

Rockwool flexi slab is £14/m2 (slightly lower thermal conductivity), has anyone used that?