aus-dem-Gebirge
2013-09-23 16:33:20
- #1
Hello to all experts, roofing specialists
the following description of the object: a heated hall with a long shed roof, the current roof covering is one layer of roofing felt and roofing felt shingles. However, it has rained inside - and not just locally - therefore it is assumed that the covering is generally leaking or becoming more and more leaky. Everything inside is wet. Step taken: drywall removed and vapor barrier foil and wet insulation removed - thus the rafters and sheathing can dry out first.
Winter is approaching and now the idea is to apply a rigid insulation above the rafters on the roof. This should preferably be done directly on the old roof covering. On top of that, trapezoidal aluminum sheets should be installed.
Inside, after drying over the winter, only a visible cladding of the rafters/sheathing should be done.
Now my question: Do I need to consider anything in the planning regarding the dew point? Should possibly a vapor-permeable membrane be laid on the old roof covering before I apply the rigid insulation (rigid foam variant - possibly with OSB board on top)?
Or are there any recommendations for another insulation variant?
How thick should the insulation be?
Are there weak points that need to be considered (transition wall/roof)?
Thanks in advance for your help!
Regards!
the following description of the object: a heated hall with a long shed roof, the current roof covering is one layer of roofing felt and roofing felt shingles. However, it has rained inside - and not just locally - therefore it is assumed that the covering is generally leaking or becoming more and more leaky. Everything inside is wet. Step taken: drywall removed and vapor barrier foil and wet insulation removed - thus the rafters and sheathing can dry out first.
Winter is approaching and now the idea is to apply a rigid insulation above the rafters on the roof. This should preferably be done directly on the old roof covering. On top of that, trapezoidal aluminum sheets should be installed.
Inside, after drying over the winter, only a visible cladding of the rafters/sheathing should be done.
Now my question: Do I need to consider anything in the planning regarding the dew point? Should possibly a vapor-permeable membrane be laid on the old roof covering before I apply the rigid insulation (rigid foam variant - possibly with OSB board on top)?
Or are there any recommendations for another insulation variant?
How thick should the insulation be?
Are there weak points that need to be considered (transition wall/roof)?
Thanks in advance for your help!
Regards!