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vapour control layer

atlonglast · 2012-07-16 23:52:13

Does an airtightness membrane such as Siga also work as a vapour control layer? According to insulation websites a vapour control layer is needed under the roof insulation and is the airtigtness membrane also a vapour layer?

16-07-2012 11:52pm

#1

atlonglast

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Does an airtightness membrane such as Siga also work as a vapour control layer? According to insulation websites a vapour control layer is needed under the roof insulation and is the airtigtness membrane also a vapour layer?

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#2 17-07-2012 9:50pm
BryanF

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atlonglast wrote: »

Does an airtightness membrane such as Siga also work as a vapour control layer?

According to insulation websites a vapour control layer is needed under the roof insulation

and is the airtigtness membrane also a vapour layer?

yes, taped and sealed etc and installed to the inside of the insulation

that's right, and not installing one (along with a lack of ventilation) is a major cause of mould in Irish homes

you asked this in question 1.

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