I'm planning to insulate this summer, as it currently looks like this in my kattvid. Between the rafters, it's 95 cm and the depth is 15 cm.
I'm also considering including the attic since it's only filled with sawdust. I was thinking of using cellulose insulation in the attic, but what should I use between the rafters?
What I know is that I need to have an air gap and then an oil-treated masonite board and then the insulation, and then gypsum or whatever else one might want.
How large should the air gap be? What type of insulation between the rafters? I can get hold of styrofoam boards (I read somewhere that there needs to be a vacuum for them to have any effect).
So any tips are welcome, more pictures can be arranged. I apologize for the pictures of the attic.
http://ladda-upp.se/galleri/berne/
I'm also considering including the attic since it's only filled with sawdust. I was thinking of using cellulose insulation in the attic, but what should I use between the rafters?
What I know is that I need to have an air gap and then an oil-treated masonite board and then the insulation, and then gypsum or whatever else one might want.
How large should the air gap be? What type of insulation between the rafters? I can get hold of styrofoam boards (I read somewhere that there needs to be a vacuum for them to have any effect).
So any tips are welcome, more pictures can be arranged. I apologize for the pictures of the attic.
http://ladda-upp.se/galleri/berne/
You get some questions instead 
Yes, an air gap is appropriate, but it should be a gap that runs from the eaves to the ridge with free flow between, otherwise it serves no purpose. How did you plan to achieve that?
In some pictures, it looks like there is plastic against the decking. It seems to be misplaced! It should be no more than 1/3 of the way into the insulation from the inside, and now it's completely outside the insulation, which definitely causes more harm than good. What is the plastic doing there?
Yes, an air gap is appropriate, but it should be a gap that runs from the eaves to the ridge with free flow between, otherwise it serves no purpose. How did you plan to achieve that?
In some pictures, it looks like there is plastic against the decking. It seems to be misplaced! It should be no more than 1/3 of the way into the insulation from the inside, and now it's completely outside the insulation, which definitely causes more harm than good. What is the plastic doing there?
I thought about placing air gaps with stöläkt in 3 places, then adding massoint. So I can go all the way up there.
No, it's not any plastic. Not planning to use it, as the house is old, and plastic wasn't used before. So it's the images that are haunting you
No, it's not any plastic. Not planning to use it, as the house is old, and plastic wasn't used before. So it's the images that are haunting you
Okay, good that it wasn't plastic there!
I believe a 3-4cm air gap is suitable.
If it's cellulosa you want, there are sheets available, see e.g. http://www.ekofiber.se
I believe a 3-4cm air gap is suitable.
If it's cellulosa you want, there are sheets available, see e.g. http://www.ekofiber.se
just thought of one more thing,
if I choose to have boards in the slanted roof, there will be a small problem, as they get narrower in a spot where the attic begins, today there's a piece of wood there so that sawdust doesn't fall down,
can I insulate the slanted roof, then decrease the insulation thickness just there and then place loose insulation against, for example, the drywall?
if I choose to have boards in the slanted roof, there will be a small problem, as they get narrower in a spot where the attic begins, today there's a piece of wood there so that sawdust doesn't fall down,
can I insulate the slanted roof, then decrease the insulation thickness just there and then place loose insulation against, for example, the drywall?
Member
· Västerbotten, Skellefteå
· 416 posts
Just finished insulating an attic with polyurethane insulation, also known as spray foam.
Turned out great, no need for an air gap, and no need to build on the studs so the ceiling height remains the same.
Ended up being about 7 cm on average.
Turned out great, no need for an air gap, and no need to build on the studs so the ceiling height remains the same.
Ended up being about 7 cm on average.
Unfortunately, also just coming with questions....
1. Crawl space.
Are you planning to just add like 10-20cm of cellulose loose-fill insulation on top of the existing sawdust? Do you build some distance against the roof boards, or does it lie directly against them?
2. The rest of the attic.
Isn't there sawdust insulation in the floor already? Do you want to make the attic warm, or shouldn't you break up the floor, add more cellulose/flax insulation, and then put the floor back a little higher up? As I understand it, do you now want to insulate under the roof boards?
1. Crawl space.
Are you planning to just add like 10-20cm of cellulose loose-fill insulation on top of the existing sawdust? Do you build some distance against the roof boards, or does it lie directly against them?
2. The rest of the attic.
Isn't there sawdust insulation in the floor already? Do you want to make the attic warm, or shouldn't you break up the floor, add more cellulose/flax insulation, and then put the floor back a little higher up? As I understand it, do you now want to insulate under the roof boards?
no, I was planning to lay it directly on the sawdust, knowing that one should check there is no moisture, otherwise it will be a big problem in the future,baljbalj said:
I am not planning to do anything with the floors, not at the moment, I only intend to insulate the roof structure (between the rafters) and then up in the attic.
What do you think about my idea?
From the inside seen:
Gypsum, wooden battens which I attach to the rafters, wind barrier, 120mm insulation, oil-hardened masonite, 32mm battens, rough boards.
How does that sound to your ears/eyes?
From the inside seen:
Gypsum, wooden battens which I attach to the rafters, wind barrier, 120mm insulation, oil-hardened masonite, 32mm battens, rough boards.
How does that sound to your ears/eyes?
uch å fy fan......what I hate sawdust, have been shoveling and shoveling... but now a little progress has been made at least, almost all air gaps are done on one side, the molding has been rebuilt, so tomorrow it will be insulation and wind paper