ᐅ Insulating a cold roof with compressed fiberglass insulation, cost
Created on: 15 Feb 2019 17:39
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NordlysHello friends,
We have a bungalow with a slab measuring 13.5 by 10 meters (44 by 33 feet), and a hipped roof with a 30° pitch along the length and 45° on the short sides. So far, the roof is not insulated. The roof area is approximately 160 square meters (1,722 square feet), possibly a bit more. The ceiling between the floors is insulated. We use the attic not as living space but as a cellar substitute. It is accessible by a staircase, not a hatch, since the stairs are easier to use. A patio door separates the living area from the unheated attic well, providing good thermal separation. Unfortunately, this floor gets very cold in winter during frost — I’ve even had paint freeze — and very warm in summer. Now that we have some funds available, we have asked a carpenter to provide a quote for insulating the unheated attic floor (ceiling below the attic).
He is quoting us 8,500 gross for installing 200 mm (8 inches) of cavity insulation between the rafters, along with a vapor barrier and drywall lining, without plastering or painting.
Is this a fair price? Too expensive? Or even a good deal?
Karsten
Done. Self-made. 160mm (6.3 inches) insulation fleece. Climafilm, the kind that opens when warm and closes when cold. Sicrall, adhesive compound, 240 meters (787 feet) of formwork board and 40 meters (131 feet) of roof battens, screws, nails. It cost 1500,- and took two days of work for two people. I chose not to use drywall. Why bother? My storage room can also have film walls.
Nordlys schrieb:
I decided against using drywall. Why bother? My storage room can just have vapor barrier walls.Hello everyone!
I’ve been reading the thread with interest, as always, and there are very divided opinions here regarding insulation for a cold roof. We are still in the construction phase and are considering whether to use the building period before moving in to possibly add insulation after all... Not an easy decision 🙂
A quick question regarding drywall versus vapor barrier walls... Wouldn’t drywall have at least some “moisture-regulating” effect and thus reduce the risk of theoretically possible condensation forming on the vapor barrier?
netuser schrieb:
Quick question about drywall and vapor barrier walls...
Wouldn't drywall have at least some moisture-regulating effect and thus reduce the risk of possible condensation forming on the vapor barrier? Gypsum is not clay... (?)
The post should be at least 30 characters long.
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HausTmMike13 Jul 2021 15:22Tell him to use a vapor-permeable vapor retarder membrane. Then confirm the offer. It costs $1.50 per m² (approximately $0.14 per ft²) more. But this way, you won’t have any issues with moisture or mold.
I consider that price more than fair. Material with insulation (€10 per m² (approximately $9.30 per ft²)), substructure and drywall (€10) plus membrane (€2.50) already totals over 20.
Of course, you could consider taking a week off and doing it yourself. I would estimate around 100 hours of pure working time if you can work intensively; otherwise, more than 200.
I consider that price more than fair. Material with insulation (€10 per m² (approximately $9.30 per ft²)), substructure and drywall (€10) plus membrane (€2.50) already totals over 20.
Of course, you could consider taking a week off and doing it yourself. I would estimate around 100 hours of pure working time if you can work intensively; otherwise, more than 200.
i_b_n_a_n schrieb:
The offer is from 2019, so once again there was desecration. I confess. It was a test to get attention 😉
I thought it would be better this way than starting new threads on the same questions ...!?
Thanks 11ant, as always brief and to the point.
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