Vapour barrier/construction foil in the floor of an Attefall house - how to do it?
Building an Attefall house, on a pillar foundation, as a complementary dwelling, which will be heated and inhabited year-round.
I have read and understood that the plastic is best placed above the floor chipboard, as these are preferably glued and screwed to the floor joists. This works well in the dry parts of the house, but what do I do in the bathroom where self-leveling compound and electric heating elements are to be installed? And how do I achieve a tight climate shell considering this?
I have read and understood that the plastic is best placed above the floor chipboard, as these are preferably glued and screwed to the floor joists. This works well in the dry parts of the house, but what do I do in the bathroom where self-leveling compound and electric heating elements are to be installed? And how do I achieve a tight climate shell considering this?
No plastic in the floor is needed. If you use plastic in the bathroom with a moisture barrier, you risk trapping moisture as well. Read more about diffusion-tight plastic before continuing the construction.
When you write "no plastic in the floor is needed," do you mean in bathrooms or in general? I assume you mean in bathrooms. There it will be a wet room mat as the surface layer, and from what I've read, you should/can also have plastic on the wall there.
Still a bit unclear to me how you practically put the whole together when you want a tight climate shell with one (bath)room excluded? Is it perhaps a "no brainer" that you just terminate the floor's plastic at the bathroom walls and leave it at that?
Still a bit unclear to me how you practically put the whole together when you want a tight climate shell with one (bath)room excluded? Is it perhaps a "no brainer" that you just terminate the floor's plastic at the bathroom walls and leave it at that?
OK, what you write is completely contrary to what I have noted before. For example, this is what it says on Träguiden about an open post foundation:
"The bottom floor over an open post foundation is part of the building's climate shell and therefore, like other climate-separating parts, must meet requirements regarding thermal insulation and airtightness.
A special airtight layer, which can also be vapor-tight, is required on the warm side (top side) of the bottom floor. The connection of the exterior walls to the bottom floor is a sensitive detail, which must be designed so that it can be made airtight in practice."
"The bottom floor over an open post foundation is part of the building's climate shell and therefore, like other climate-separating parts, must meet requirements regarding thermal insulation and airtightness.
A special airtight layer, which can also be vapor-tight, is required on the warm side (top side) of the bottom floor. The connection of the exterior walls to the bottom floor is a sensitive detail, which must be designed so that it can be made airtight in practice."
And this is what GVK writes about vapor barriers in exterior walls in wet rooms:
"Today's modern waterproofing layers of plastic mat or waterproofing film usually have a sufficiently high resistance to vapor permeability so that the vapor barrier, the plastic film intended to protect the building structure and insulation, can/should remain without disadvantage."
"Today's modern waterproofing layers of plastic mat or waterproofing film usually have a sufficiently high resistance to vapor permeability so that the vapor barrier, the plastic film intended to protect the building structure and insulation, can/should remain without disadvantage."