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40mm cavity - pumped insulation

Doorin14 · 2016-10-19 15:21:01

Hi, I'm trying to calculate the u-value change for pumping a 40mm cavity with something like Kingspan Eocbead. The existing wall is 100mm block, 40mm cavity, 60mm insulation, 100m block. It is for Part L compliance. The specifications on the product brochure only quote for 75mm and up. Any help would be appreciated.

19-10-2016 03:21PM

#1

Doorin14

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Join Date: October 2016

Posts: 2

Hi,
I'm trying to calculate the u-value change for pumping a 40mm cavity with something like Kingspan Eocbead. The existing wall is 100mm block, 40mm cavity, 60mm insulation, 100m block. It is for Part L compliance. The specifications on the product brochure only quote for 75mm and up. Any help would be appreciated.

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Comments

#2 19-10-2016 04:07PM

sydthebeat

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http://www.nsai.ie/Our-Services-(1)/Certification/IAB050226.aspx

the thermal conductivity is contained in the IAB cert, depending on which product you use.

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#3 19-10-2016 05:38PM

Doorin14

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Join Date: October 2016

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Indeed it is, thanks.
Thermal conductivity of 0.035 W/mK
At a thinkness of 40mm this would give a thermal resistance of 1.143 m2K/W, increased from 0.180 which is the value used for an air cavity.
I think I'm getting the hang of this now.

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