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Attic insulation Metac v Knauf Earthwool

Fendt712 · 2016-11-29 19:01:44

Hi all, looking for opinions on attic insulation. New build house and looking for a high spec. Options : 1 Moy Metac - 220mm, u value of 0.34 installed between joists. . Knauf Earth wool 200 mm, u value 0.44 rolled 90 degrees to joists to break cold bridge in attic. 2 : use 200mm earthwool between joists instead of Metac…

29-11-2016 8:01pm

#1

Fendt712

Registered Users Posts: 18 ✭

Join Date: April 2012

Posts: 14

Hi all, looking for opinions on attic insulation. New build house and looking for a high spec.

Options : 1
Moy Metac - 220mm, u value of 0.34 installed between joists.
. Knauf Earth wool 200 mm, u value 0.44 rolled 90 degrees to joists to break cold bridge in attic.

2 : use 200mm earthwool between joists instead of Metac and 200mm earthwool also rolled 90 degrees as above.

My question is, there's a difference in price of approx 2k between the 2 different installations. I have no issue paying for the Metac but is it a 2k superior product when I'm achieving approx 0.1 of a difference in u value. Thanks in advance.

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