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External Insulation Wrap 100mm vs 150mm

BalboBiggins · 2021-08-04 09:19:08

Hi guys, I am talking to two different companies for external insulation. One is cheaper but their wrap is 100mm and the other is 150mm. They're both saying their wrap has a U Value of 0.27 though so I'm a bit confused. Is 150mm overkill?

04-08-2021 10:19AM

#1

BalboBiggins

Registered Users, Registered Users 2 Posts: 239 ✭✭

Join Date: May 2018

Posts: 173

Hi guys, I am talking to two different companies for external insulation. One is cheaper but their wrap is 100mm and the other is 150mm. They're both saying their wrap has a U Value of 0.27 though so I'm a bit confused. Is 150mm overkill?

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Comments

#2 04-08-2021 10:55PM

BryanF

Moderators, Home & Garden Moderators Posts: 10,147 Mod ✭✭✭✭

Join Date: October 2010

Posts: 9851

Assuming they are both similar u-value, I’d assume One is using mineral wool, one is using PIR. Mineral wool is better from fire and environment when compared with PIR. If your eaves can take the mineral wool thickness, it would be my preferred spec.

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