Wood fibre in pitched roof

[ColdProof]

Hi

So when talking about wood products on the page on Analysis, interpretation and assessment of the calculation results (https://wufi.de/en/service/wufi-forum/? ... bd265076bd) does this include flexible wood fibre in the same category?

See attached results for the WME% in the outermost 1cm of flexible wood fibre in a pitched roof construction modelled according to WUFI guidelines, with external breather membrane (0.1 sd) and internal variable humidity membrane. It seems to get up to 45% which is way over the 18-20% guideline, but as it's happening when temperatures are low, then are we to assume in this case it's fine? So then looking at RH, it's a max of 95% RH at the top of the wood fibre under the breather membrane during the cold periods, so taking the WTA approach (where it must not exceed 95% at 0°C and 86% at 30°) then I guess we're OK?