I have torn up a few square meters of flooring to access the crawl space and have taken the opportunity to shovel up all the old mineral wool that smells strongly of pentachlorophenols. Left between the floor joists is now only the old black wind protection paper, which is brittle as can be and smells possibly even more than the mineral wool.
I see that there is thicker wind protection paper (AC350) available for purchase, intended for wall use, but does it make any difference to use it instead of the thinner AC160? The thicker one is a bit more expensive but can be bought locally, unlike the thinner one. Or should I switch to age-resistant plastic?
Additionally, is it best to continue insulating with loose fill or should I buy boards? C/C 45 in the joist system, about 20 cm thick with asbestos cement at the bottom.
I see that there is thicker wind protection paper (AC350) available for purchase, intended for wall use, but does it make any difference to use it instead of the thinner AC160? The thicker one is a bit more expensive but can be bought locally, unlike the thinner one. Or should I switch to age-resistant plastic?
Additionally, is it best to continue insulating with loose fill or should I buy boards? C/C 45 in the joist system, about 20 cm thick with asbestos cement at the bottom.
The main task of the papp is to prevent air movement in the insulation, but also to keep it in place if the trossbotten is not completely sealed (most common in old wood chip-insulated joist systems). If it is possible to achieve sufficient tightness without the papp, then the problem is solved anyway.