Hello,
I am not an expert, and before insulating my roof as described below, I would like to hear some opinions.
For simplicity, I am uploading a few pictures to help with understanding.
To begin with, I can get standard kitchen rolls very cheaply.
There is old fiberglass insulation with aluminum foil between the rafters, which is only about 60mm (2.4 inches) thick. The kitchen rolls are simply pressed onto it, and the 12mm (0.5 inch) OSB boards (12mm chosen for flexibility) are screwed onto the rafters. (Rafter thickness 160mm (6.3 inches))
The visible OSB boards are sealed at the joints with Isover tape, serving as the vapor barrier.
Additionally, I want to insulate the floor, possibly using 20mm (0.8 inch) polystyrene and OSB boards.
The questions I have regarding the method shown and described in the pictures are:
- Could this lead to mold?
- Is this prohibited from a fire safety perspective? Or are there roof insulation materials with similarly flammable properties that are nonetheless commonly used?
I am not an expert, and before insulating my roof as described below, I would like to hear some opinions.
For simplicity, I am uploading a few pictures to help with understanding.
To begin with, I can get standard kitchen rolls very cheaply.
There is old fiberglass insulation with aluminum foil between the rafters, which is only about 60mm (2.4 inches) thick. The kitchen rolls are simply pressed onto it, and the 12mm (0.5 inch) OSB boards (12mm chosen for flexibility) are screwed onto the rafters. (Rafter thickness 160mm (6.3 inches))
The visible OSB boards are sealed at the joints with Isover tape, serving as the vapor barrier.
Additionally, I want to insulate the floor, possibly using 20mm (0.8 inch) polystyrene and OSB boards.
The questions I have regarding the method shown and described in the pictures are:
- Could this lead to mold?
- Is this prohibited from a fire safety perspective? Or are there roof insulation materials with similarly flammable properties that are nonetheless commonly used?
Voki1 schrieb:
I did the same, but with toilet paper. However, fire safety regulations only allowed three-ply rolls, so I had to remove one layer from the four-ply roll and then roll it all back up. It was a bit tedious, but it was worth it. But once you had rolled everything back up, you ended up with a layer of air inside – which provides additional insulation.
Thank you for the many responses; I suspected some might think I was joking.
I now have the opportunity to get the rolls at a good price, but what can I do with so many rolls? Also, two packs with four rolls each fit tightly between the rafters. Originally, I just wanted to use OSB and the old insulation to prevent it from falling down and to make the attic look neat. The attic will only be used as storage, so it makes more sense to insulate the floor or the top ceiling of the uppermost story.
Maybe a few discussion points about the rolls and their possible advantages:
- Ecological insulation material (cellulose)
- The paper structure is multilayered with air pockets, which also cause absorbency when in contact with liquids, so it should insulate well.
- The rolls are wrapped in plastic foil, which could offer extra protection against saturation. How this interacts with condensation and the OSB vapor barrier is a big question.
- Perhaps a more far-fetched advantage: some people stockpile toilet paper as an emergency supply, so I would be well stocked in that regard as well.
Thanks in advance for your replies!
I now have the opportunity to get the rolls at a good price, but what can I do with so many rolls? Also, two packs with four rolls each fit tightly between the rafters. Originally, I just wanted to use OSB and the old insulation to prevent it from falling down and to make the attic look neat. The attic will only be used as storage, so it makes more sense to insulate the floor or the top ceiling of the uppermost story.
Maybe a few discussion points about the rolls and their possible advantages:
- Ecological insulation material (cellulose)
- The paper structure is multilayered with air pockets, which also cause absorbency when in contact with liquids, so it should insulate well.
- The rolls are wrapped in plastic foil, which could offer extra protection against saturation. How this interacts with condensation and the OSB vapor barrier is a big question.
- Perhaps a more far-fetched advantage: some people stockpile toilet paper as an emergency supply, so I would be well stocked in that regard as well.
Thanks in advance for your replies!
H
HilfeHilfe1 Mar 2015 20:23Stop procrastinating, install the insulation boards, and get ready for high heating costs.
I got a few rolls and will just give it a try. I also managed to get some leftover Isover insulation batts through Ebay Classifieds. I’ll probably do a half-and-half approach and check it later with a thermal imaging camera.
@ hilfehilfe: I already don’t have high heating costs, so why be so unfriendly right away?
@ hilfehilfe: I already don’t have high heating costs, so why be so unfriendly right away?
MaxJosef schrieb:
-Then maybe one more advantage, although it’s a bit of a stretch: you might have heard that some people stockpile toilet paper as part of their emergency preparedness. I’d be right in on that business.
Thanks in advance for the answers!Definitely an interesting business model.
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