Is there a manufacturer that sells such in Sweden? Preferably with tongue and groove. Would be very convenient to lay on my rain-sensitive insulation while I work on the outer roof which is quite complicated and will take a few weeks.
I have found the following two boards in Germany, but they do not seem to be sold here:
http://www.agepan.de/produkt/gruppe/357--agepan_dwd_protect_n+f
http://www.egger.com/SCAN_en/products/?N=4294961875+21&R=product-269-scan-en
I have found the following two boards in Germany, but they do not seem to be sold here:
http://www.agepan.de/produkt/gruppe/357--agepan_dwd_protect_n+f
http://www.egger.com/SCAN_en/products/?N=4294961875+21&R=product-269-scan-en
Self-builder
· Stockholm
· 8 605 posts
Hmm.
Most wood panels and chips are "diffusion open" - i.e., they allow moisture to pass through?
Or do you mean a panel that does NOT let rain through downwards but lets moisture outwards - like a membrane/sheet?
/K
Most wood panels and chips are "diffusion open" - i.e., they allow moisture to pass through?
Or do you mean a panel that does NOT let rain through downwards but lets moisture outwards - like a membrane/sheet?
/K
It is true that fiberboards are generally not "diffusion-tight," but they also don't have particularly good permeability. OSB 13mm, for example, has an SD value of about 2.4. I would like a material that has a value below 0.5.
This way, you can create a good environment for your insulation that doesn't get wet from above but can ventilate out any condensation or moist air from inside the construction.
I've spoken with Egger, who produces one of the boards I linked to, and they claim I should be able to order through Beijer and Optimera in Sweden. We'll see how it goes.
This way, you can create a good environment for your insulation that doesn't get wet from above but can ventilate out any condensation or moist air from inside the construction.
I've spoken with Egger, who produces one of the boards I linked to, and they claim I should be able to order through Beijer and Optimera in Sweden. We'll see how it goes.
Self-builder
· Stockholm
· 8 605 posts
But under the insulation, you should still have a vapor barrier?
Unless you're working with hygroscopic insulation of course - then it's paper instead - but why do you think you need a particularly permeable board - most constructions have gypsum or chipboard as a ceiling, alternatively tongued and grooved wood
/K
Unless you're working with hygroscopic insulation of course - then it's paper instead - but why do you think you need a particularly permeable board - most constructions have gypsum or chipboard as a ceiling, alternatively tongued and grooved wood
/K
Hello, thank you for your response.
The house is somewhat special. It is insulated with straw in the roof and walls, and straw requires a completely diffusion-open construction throughout (except for the cladding outside the air gap). On the inside, it is clay-plastered.
The house is somewhat special. It is insulated with straw in the roof and walls, and straw requires a completely diffusion-open construction throughout (except for the cladding outside the air gap). On the inside, it is clay-plastered.
Self-builder
· Stockholm
· 8 605 posts
Ah, thanks - I'm a bit curious about the question, but I understand 
Normally, back in the days when straw was used, there wasn't sheet material, hence the problem is a bit special. But I understand your quandary now that you have to combine straw with sheets - good luck finding them anyway
/K
Normally, back in the days when straw was used, there wasn't sheet material, hence the problem is a bit special. But I understand your quandary now that you have to combine straw with sheets - good luck finding them anyway
/K