Isolatie en energie
Koudebrug
A thermal bridge is a spot in the insulation envelope where heat can escape relatively easily. In dormers, thermal bridges mainly occur at the connections between side walls, the roof, and the front facade.
Hoofdgids · 16 min lezenDakkapel isolatie: complete uitlegConsequences
- Lower surface temperature on the inside.
- Risk of condensation on the cold surface.
- Mold formation or moisture damage over time.
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Where do thermal bridges occur in a dormer?
Typically at the connections: between the dormer floor and the existing roof surface, at the location of the side walls, around the window frame, and at continuous timber studs that interrupt the insulation envelope. A good dormer detail allows the insulation to continue as much as possible and avoids metal or timber penetrations through the insulation layer.Why are thermal bridges a problem?
A thermal bridge increases the local heat loss and, more importantly, cools down the internal surface. Condensation and eventually mold can form on that cold spot, even if the rest of the construction is energetically sound. A thermal bridge is therefore both an energy problem and a health risk.How do you prevent thermal bridges?
By allowing the insulation layer to run continuously, using thermally broken window frame profiles, utilizing thermal bridge breakers at connections, and working out connection details on the drawing board instead of improvising on the construction site.