Schaffe123
2020-03-15 14:14:47
- #1
Hello everyone, since I have already been helped here before, I need a tip or confirmation again.
Boards are attached in the middle between the attic rafters (11-12cm). On top of that is a solid, stone-like filling (5-6cm: slag, volcanic rock,... whatever...). Now I want to apply about 16 cm thick insulation, the floor should later be walkable for storage purposes. Since the "slag" is very sharp-edged and some electrical cables are also laid on the floor, I do not want/cannot use a vapor barrier.
Here is my plan:
- Three-layer screwing of squared timber (60x60, larger ones are too bulky) to the floor in a cross pattern
- Filling with perlite up to a height of 16cm
- Tongue and groove boards for walkability with a distance of 1-2 cm each for ventilation (gaps necessary? They are not nice, but it will only be used for storage)
This should possibly allow any moisture that arises to be removed, as the attic is generally ventilated. According to the U-value calculator, it is okay, but I would just like confirmation whether it really fits or if it could be done even simpler (squared timbers are heavy).
Attached is the calculation.
Many thanks in advance!
Regards
Boards are attached in the middle between the attic rafters (11-12cm). On top of that is a solid, stone-like filling (5-6cm: slag, volcanic rock,... whatever...). Now I want to apply about 16 cm thick insulation, the floor should later be walkable for storage purposes. Since the "slag" is very sharp-edged and some electrical cables are also laid on the floor, I do not want/cannot use a vapor barrier.
Here is my plan:
- Three-layer screwing of squared timber (60x60, larger ones are too bulky) to the floor in a cross pattern
- Filling with perlite up to a height of 16cm
- Tongue and groove boards for walkability with a distance of 1-2 cm each for ventilation (gaps necessary? They are not nice, but it will only be used for storage)
This should possibly allow any moisture that arises to be removed, as the attic is generally ventilated. According to the U-value calculator, it is okay, but I would just like confirmation whether it really fits or if it could be done even simpler (squared timbers are heavy).
Attached is the calculation.
Many thanks in advance!
Regards