G
Gonzo baut14 Oct 2011 16:55Hello everyone!
The roof of our terraced house is insulated with mineral wool by the developer, all the way up to the ridge.
Recently, about 1.50 m (5 feet) below the ridge, an attic floor has been installed using plywood panels on cross beams. The developer has only sealed the underside of the attic with drywall panels (gypsum board) towards the heated living spaces below.
The attic will only be used as a storage space and will remain unheated. Access to the attic will be through the stairwell using a pull-down ladder.
My question is: Should I add extra insulation with mineral wool or similar material between the plywood panels and the drywall, or not? What could be the advantages or disadvantages of such insulation?
I look forward to constructive advice!
Kind regards
The roof of our terraced house is insulated with mineral wool by the developer, all the way up to the ridge.
Recently, about 1.50 m (5 feet) below the ridge, an attic floor has been installed using plywood panels on cross beams. The developer has only sealed the underside of the attic with drywall panels (gypsum board) towards the heated living spaces below.
The attic will only be used as a storage space and will remain unheated. Access to the attic will be through the stairwell using a pull-down ladder.
My question is: Should I add extra insulation with mineral wool or similar material between the plywood panels and the drywall, or not? What could be the advantages or disadvantages of such insulation?
I look forward to constructive advice!
Kind regards
Hello, I’m not an expert, but I’ll just go ahead and respond...
We insulated both the attic space and the ceiling below.
I don’t see any drawbacks with this approach. The only thing I’m not entirely sure about is whether the insulation in the ceiling below is allowed to be installed “in front of” the roof vapor barrier. Your existing vapor barrier probably runs up to the ridge. Our vapor barrier is installed below the ceiling.
Maybe someone here has more knowledge on this...
We insulated both the attic space and the ceiling below.
I don’t see any drawbacks with this approach. The only thing I’m not entirely sure about is whether the insulation in the ceiling below is allowed to be installed “in front of” the roof vapor barrier. Your existing vapor barrier probably runs up to the ridge. Our vapor barrier is installed below the ceiling.
Maybe someone here has more knowledge on this...
Gonzo baut schrieb:
Hello everyone!
The roof of our terraced house has been insulated with mineral wool by the developer all the way up to the ridge.
Recently, about 1.50 m (5 feet) below the ridge, an attic floor was installed using plywood panels on cross beams. The developer has only sealed the underside towards the later heated living spaces below with drywall (gypsum board) panels.
The attic is intended to be used only as a storage space and will remain unheated. It will be accessible via a retractable ladder from the stairwell.
My question is: Should I add extra insulation, such as mineral wool, between the plywood panels and the drywall, or not? What are the possible advantages or disadvantages of such insulation?
I look forward to constructive advice!
Kind regardsHello!
As far as I know, an unheated pitched attic space must either be ventilated or heated. After your modification, this would no longer be the case.
The issue is that warm, moist air from the living areas below can rise through the hatch or gaps into the attic and condense there—creating an ideal environment for mold.
Adding insulation (like mineral wool) would worsen this problem by increasing the thermal separation between the spaces.
Installing a vapor barrier (foil) could help reduce the passage of moisture vapor.
If the floor is indeed plywood panels, you should also be mindful of the weight.
Best regards,
Tomtom.
Hello,
If you don’t insulate the ceiling between floors, you’re basically heating the room above, which is a waste of money.
If you do insulate the ceiling between floors, you need to install a vapor barrier facing the living space/ceiling and seal the joints and connections to the walls.
We also used double insulation, and there is no unusual moisture detected upstairs. However, we placed moisture meters there as a precaution.
By now, the authorities even specify what you have to insulate, although I’m not sure if this applies to new builds or renovations.
Best regards, Sven
If you don’t insulate the ceiling between floors, you’re basically heating the room above, which is a waste of money.
If you do insulate the ceiling between floors, you need to install a vapor barrier facing the living space/ceiling and seal the joints and connections to the walls.
We also used double insulation, and there is no unusual moisture detected upstairs. However, we placed moisture meters there as a precaution.
By now, the authorities even specify what you have to insulate, although I’m not sure if this applies to new builds or renovations.
Best regards, Sven
Shorty schrieb:
Hello
We also used double insulation, and there is no abnormal moisture up there. However, we set up moisture meters as a precaution. Hello,
we insulated the same way. My question is: From what percentage (%) do you consider moisture abnormal? What percentage are you measuring?
Similar topics