Actis sytem or mineral glass insulation?

[JCL]

Actis or fiberglass insulation? We have 225 studs in external walls and ceilings. Including the vaulted ceilings. I cant see much difference in the prices. Actis seem to be able to smash the u values to pieces so we would be over insulated. However will have to counter batten everything. Or mineral wool and we wouldn't have to counter batten… but still able to achieve the u values?

[Mr Punter]

There are mixed views on multi foil insulation.  Given the choice, I would go with fibreglass.  Some of the multi foils are highly flammable.

[JCL]

@Mr Punter Thank you. Do you think over doing u values is needed? Ours is meant to be 0.18 for walls 0.15 ceilings 

[nod]

I’ve used multi foil in all slopes and vaulted ceiling’s 

I used 70 rigid insulation between each rafter Then multi foil tacked and taped Then 4-1 batons Followed with 70 mil insulated plasterboard 

[JohnMo]

You can get various grades of mineral wool or fibreglass, something like Knauf Frametherm 32. 

 

I used multifoil in a summer house supported with loads of other insulation material. Not sure it would find a place in my house.