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2 replies
1k views
2 replies
Insulate on top of the joist instead of in the joist
Got an idea but wondering if there's any downside to doing it?
A bedroom on the upper floor has about 220 cm ceiling height. Beadboard paneling as the ceiling.
The joist over to the attic is insulated with 15 cm sawdust and 10 cm rock wool, there is no plastic. The sloped ceiling and gable in the bedroom are completely torn down and will be additionally insulated and covered with plastic.
I'm considering tearing down the ceiling, sawdust, and insulation to expose the collar beams and then laying a new floor of tongue-and-groove boards on top of the beams which will also serve as the ceiling. On top of the boards, I can then lay plastic and on top of that new insulation. The beams and the ceiling between them we'll probably paint white.
Are there any downsides to doing it this way?
The advantages as I see it are that we can put in plastic without lowering the ceiling. Also gets better ceiling height/volume in the room. The house has a mansard roof, so there's plenty of space for 40-50 cm new insulation on top of the collar beams.
A bedroom on the upper floor has about 220 cm ceiling height. Beadboard paneling as the ceiling.
The joist over to the attic is insulated with 15 cm sawdust and 10 cm rock wool, there is no plastic. The sloped ceiling and gable in the bedroom are completely torn down and will be additionally insulated and covered with plastic.
I'm considering tearing down the ceiling, sawdust, and insulation to expose the collar beams and then laying a new floor of tongue-and-groove boards on top of the beams which will also serve as the ceiling. On top of the boards, I can then lay plastic and on top of that new insulation. The beams and the ceiling between them we'll probably paint white.
Are there any downsides to doing it this way?
The advantages as I see it are that we can put in plastic without lowering the ceiling. Also gets better ceiling height/volume in the room. The house has a mansard roof, so there's plenty of space for 40-50 cm new insulation on top of the collar beams.
No problems that I can see! Build the roof where you want it!
Or at least no construction issues. It could be troublesome for tall people to risk hitting their heads on the beams. A flat roof is probably easier to avoid...
Or at least no construction issues. It could be troublesome for tall people to risk hitting their heads on the beams. A flat roof is probably easier to avoid...
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