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sufficient insulation for new extention?

geoffwode · 2013-08-06 12:02:03

Hi, I'm building a new extension to the back of the house. Builder is suggesting the following. Just wondering if that is sufficient insulation or if it should be beefed up a bit more: 100mm Dense Concrete Block 80mm Kingspan rigid insulation 40mm residual cavity 100mm outer block wall Thank you, GW

06-08-2013 12:02pm

#1

geoffwode

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Join Date: May 2013

Posts: 9

Hi,

I'm building a new extension to the back of the house. Builder is suggesting the following. Just wondering if that is sufficient insulation or if it should be beefed up a bit more:

100mm Dense Concrete Block
80mm Kingspan rigid insulation
40mm residual cavity
100mm outer block wall

Thank you,
GW

0

Comments

#2 06-08-2013 12:48pm

MicktheMan

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No, Yes

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#3 06-08-2013 3:24pm

BarneyMc

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Go for a wide cavity (approx. 200mm) and pump it with beads. Get some advice from a certified engineer/architect - it's worth it!

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#4 07-08-2013 12:28pm

geoffwode

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Join Date: May 2013

Posts: 9

MicktheMan wrote: »

No, Yes

I would be grateful to know what you think would be sufficient so.

Thanks

0
#5 07-08-2013 12:52pm

sinnerboy

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Posts: 5071

That can't be answered in isolation. Walls floors roofs windows all U Values have to be assessed together. No doubt your certifying architect will assist further.

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