wpic
2018-02-09 21:21:57
- #1
I believe other information is required here in connection with a property purchase and the assessment of the effort needed for the (energy-related) renovation of the property.
I assume it is a prefabricated house built in 1969. Your question relates to the insulation of the ceiling above the ground floor: the ceiling structure – probably a timber beam construction with large spacing between beams – is covered on the cold top side with chipboard panels. The chipboard panels are relatively vapor-tight. Condensation of room air moisture can occur on the underside of the chipboard panels, leading to moisture penetration of the insulation layer in the ceiling, with the risk of mold growth. The ceiling structure must be corrected and properly constructed in terms of building physics in connection with any changes to the ceiling insulation. The so-called "Unterspannbahn" on the roof trusses – the "vapor barrier" – is probably indeed a relatively vapor-tight foil, which by now will have been degraded by UV radiation and no longer fulfills its function.
You need property purchase advice for this object. If it is a prefabricated house from the 1960s, other constructive aspects should also be examined.
I assume it is a prefabricated house built in 1969. Your question relates to the insulation of the ceiling above the ground floor: the ceiling structure – probably a timber beam construction with large spacing between beams – is covered on the cold top side with chipboard panels. The chipboard panels are relatively vapor-tight. Condensation of room air moisture can occur on the underside of the chipboard panels, leading to moisture penetration of the insulation layer in the ceiling, with the risk of mold growth. The ceiling structure must be corrected and properly constructed in terms of building physics in connection with any changes to the ceiling insulation. The so-called "Unterspannbahn" on the roof trusses – the "vapor barrier" – is probably indeed a relatively vapor-tight foil, which by now will have been degraded by UV radiation and no longer fulfills its function.
You need property purchase advice for this object. If it is a prefabricated house from the 1960s, other constructive aspects should also be examined.