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40mm cavity - pumped insulation

  • 19-10-2016 3:21pm
    #1
    Doorin14
    Registered Users, Registered Users 2 Posts: 4 ✭


    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.


Comments

  • #2
    sydthebeat
    Subscribers Posts: 42,576 ✭✭✭✭sydthebeat


    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.


  • #3
    Doorin14
    Registered Users, Registered Users 2 Posts: 4 ✭Doorin14


    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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