ᐅ Roof Insulation (Rafter Insulation): Is It Still Salvageable?
Created on: 11 Aug 2019 20:37
K
k.loe123Hello everyone,
We recently bought a house from the 1950s and have now started renovation work. We are still uncertain about the necessary measures in the attic. The roof structure was insulated around the early 1990s with Rockwool placed between the rafters.
As a layperson, the insulation looks quite unprofessional to me (see pictures). Some of the stapled Rockwool batts are already hanging down, and the aluminum facing is often damaged. Underneath, the insulation material looks quite black. The roof itself is covered with clay tiles, and between the tiles and the insulation, a layer of Delta foil SPF is stapled. The walls in the attic look like there might have been mold at some point.
What would you do in such a case? Simply staple the batts back in place, or would a complete renovation of the roof insulation be advisable? We are also considering insulating the top floor ceiling. In such a case, would you remove the old insulation between the rafters or leave it as it is?
Thanks for your input!
Konstantin
We recently bought a house from the 1950s and have now started renovation work. We are still uncertain about the necessary measures in the attic. The roof structure was insulated around the early 1990s with Rockwool placed between the rafters.
As a layperson, the insulation looks quite unprofessional to me (see pictures). Some of the stapled Rockwool batts are already hanging down, and the aluminum facing is often damaged. Underneath, the insulation material looks quite black. The roof itself is covered with clay tiles, and between the tiles and the insulation, a layer of Delta foil SPF is stapled. The walls in the attic look like there might have been mold at some point.
What would you do in such a case? Simply staple the batts back in place, or would a complete renovation of the roof insulation be advisable? We are also considering insulating the top floor ceiling. In such a case, would you remove the old insulation between the rafters or leave it as it is?
Thanks for your input!
Konstantin
Joedreck schrieb:
Are there ventilation options in the attic? Should the attic be accessible, or can you do without the space?The attic is unoccupied and has two small windows for ventilation. The floor will need to be walkable again after insulation and is intended to be used for storage.
The top floor ceiling consists of wooden beams, I assume?
Personally, I would then fill in cellulose insulation, double up the joists crosswise, add more insulation on top, and then install tongue-and-groove boards. Using loose-fill insulation helps minimize thermal bridges, provides good moisture resistance, and can be installed quite easily by yourself.
Please ensure a minimum level of ventilation at the top. This will prevent mold and save you from having to deal with old materials.
Personally, I would then fill in cellulose insulation, double up the joists crosswise, add more insulation on top, and then install tongue-and-groove boards. Using loose-fill insulation helps minimize thermal bridges, provides good moisture resistance, and can be installed quite easily by yourself.
Please ensure a minimum level of ventilation at the top. This will prevent mold and save you from having to deal with old materials.
Joedreck schrieb:
The top floor ceiling is made of wooden beams, I assume?Yes, the top floor ceiling is a wooden beam ceiling with boarding.
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