KlausWendler
2015-03-09 14:39:31
- #1
Hello everyone,
we recently bought an old prefabricated house built in 1969. Since apparently a lot of heat is lost through the upper floor ceiling, we plan to insulate it in the near future. It is a timber frame construction. There is already 10 cm thick glass wool in the ceiling, which, however, has become very compressed over the decades.
I have now received an offer for blown-in insulation: 12,000 EUR! The high costs are due to the ceiling being open towards the roof overhang, allowing the heat to escape more or less unhindered into the roof overhang. According to the offer, the open spots must first be sealed, which only works by opening the roof.
I am now considering doing it myself, opening the ceiling from above and simply adding some rock wool to save costs. I discussed this with an energy consultant, but he said that the sides should definitely be sealed so that the insulation (no matter what kind) is not undermined by cold air. "Only if it is really sealed all around does the insulation actually do any good." Is he right about that?
Sealing from the inside is, in my opinion, not possible, you simply can’t get to it. I don’t dare go to the roof or the roof overhang. It seems to depend on whether sealing is really necessary.
What do you think?
Thanks in advance!
Best regards
Klaus
we recently bought an old prefabricated house built in 1969. Since apparently a lot of heat is lost through the upper floor ceiling, we plan to insulate it in the near future. It is a timber frame construction. There is already 10 cm thick glass wool in the ceiling, which, however, has become very compressed over the decades.
I have now received an offer for blown-in insulation: 12,000 EUR! The high costs are due to the ceiling being open towards the roof overhang, allowing the heat to escape more or less unhindered into the roof overhang. According to the offer, the open spots must first be sealed, which only works by opening the roof.
I am now considering doing it myself, opening the ceiling from above and simply adding some rock wool to save costs. I discussed this with an energy consultant, but he said that the sides should definitely be sealed so that the insulation (no matter what kind) is not undermined by cold air. "Only if it is really sealed all around does the insulation actually do any good." Is he right about that?
Sealing from the inside is, in my opinion, not possible, you simply can’t get to it. I don’t dare go to the roof or the roof overhang. It seems to depend on whether sealing is really necessary.
What do you think?
Thanks in advance!
Best regards
Klaus