Determining water vapour diffusion resistance factor

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DavidG
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Determining water vapour diffusion resistance factor

Post by DavidG » Fri Oct 02, 2020 9:56 pm -1100

Test results for a rigid insulation board are given as water vapour transmission rate (132 mg/m2.h) and water vapour resistance 38.2 MNs/g.
Can I determine the water vapour diffusion resistance factor from these?
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Thomas
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Re: Determining water vapour diffusion resistance factor

Post by Thomas » Tue Oct 06, 2020 10:48 pm -1100

Hi DavidG,

the conversion between various measures of water vapour resistance and resistivity is described in http://builddesk.co.uk/wp-content/uploa ... tances.pdf, for example.

Regards,
Thomas
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