Hello,
I'm planning to insulate the attic this weekend. We've extended the house, so we took the opportunity to vacuum out the sawdust that was up there on the attic floor. There is no insulation under the outer roof. In the walls, there's about 70 mm of insulation, at least in the parts we've redone. No plastic in the walls there. I'm not sure about the floor. I was thinking of placing age-resistant plastic on the attic floor's rough planks and then 120 mm mineral wool. Is that reasonable? Feedback is welcome.
The cabin is unheated when we're not there, meaning it's heated up on weekends only.
/David
I'm planning to insulate the attic this weekend. We've extended the house, so we took the opportunity to vacuum out the sawdust that was up there on the attic floor. There is no insulation under the outer roof. In the walls, there's about 70 mm of insulation, at least in the parts we've redone. No plastic in the walls there. I'm not sure about the floor. I was thinking of placing age-resistant plastic on the attic floor's rough planks and then 120 mm mineral wool. Is that reasonable? Feedback is welcome.
The cabin is unheated when we're not there, meaning it's heated up on weekends only.
/David
I am happy to follow this reasoning. I have tried to figure out what to do with our own house from the last century. I will remove all "new" insulation and completely rely on kutterspån. It feels like the most right thing to do.
The weekend has started and you have probably already started laying plastic on the floor.
Remove it again and lay the insulation directly on the råsponten!
In a house where you will have moisture movements in and out of walls/ceilings/floors due to cold storage/heating, you should NOT have anything that stops this moisture migration. There is a lot of information to read here on BH about this. Use the search function.
Remove it again and lay the insulation directly on the råsponten!
In a house where you will have moisture movements in and out of walls/ceilings/floors due to cold storage/heating, you should NOT have anything that stops this moisture migration. There is a lot of information to read here on BH about this. Use the search function.
Oh no, I haven't started laying plastic yet, spent Saturday afternoon vacuuming up the last of the sawdust instead. Then I will return the plastic to Bauhaus, nice!! Thank you.
Sent from my GT-P7500 using Byggahus
Sent from my GT-P7500 using Byggahus
Despite the nice search function on byggahus, it's perhaps not that obvious after all. I've received responses from a couple of experienced builders who would lay plastic in my case. Well, I guess I'll sleep on it... as usual, there are as many opinions as there are ways to do things.
Sent from my GT-P7500 using Byggahus
Sent from my GT-P7500 using Byggahus
If you don't have plastic in the walls and you're turning off the heat, skip the plastic. You won't be able to create a completely sealed plastic layer by trying to place plastic in the spaces between the roof trusses.
I wouldn't have removed the sawdust; it would have stayed under the new insulation.
I've done this maneuver in the summer house and left the wood shavings, then added a layer of loose fill so that we now have about 300mm of insulation.
I wouldn't have removed the sawdust; it would have stayed under the new insulation.
I've done this maneuver in the summer house and left the wood shavings, then added a layer of loose fill so that we now have about 300mm of insulation.
Yes, OK, leaning towards going plastic-free. It does save some money/time as well. The reason the shavings were removed is mainly because shavings fell into the bed since we removed the tretex from the inner ceiling... despite the fact that there was paper under the shavings.
Thank you for your responses!
Thank you for your responses!