U
Unregistriert6 Jan 2008 20:16We are now in our second winter living in our beautiful new house, but we are having an issue with moisture on one of the roller shutters. The inside surface of the roller shutter is constantly wet, which causes it to sometimes freeze during frost and then become very difficult to operate. These are aluminum mini blinds that are foam-filled. The roller shutter box was installed together with the window and is therefore located behind the external wall insulation. (The house is made of sand-lime brick with 15cm Styrofoam insulation on the outside (6 inches)). Above the rooms is a roof terrace with a masonry parapet. There are no moisture problems or similar issues on the ceiling or walls of the rooms, so we assume the terrace is properly sealed.
Where is the moisture on the roller shutter coming from?
If more information about the building materials used is needed, I can provide it.
Best regards
Where is the moisture on the roller shutter coming from?
If more information about the building materials used is needed, I can provide it.
Best regards
Hello
It is naturally difficult to provide a solid diagnosis from a distance without an inspection.
Based on your description, this is likely a condensation issue. Shutter boxes often pose a risk of thermal bridging. That’s why they are usually made from rigid polystyrene foam with additional thermal insulation. For example, if the insulation on the outward and upper-facing sides is damaged or missing, a thermal bridge forms, leading to condensation. Another common problem is the airtightness of the wall and ceiling connections around the shutter boxes. Due to convection, the component’s temperature drops, resulting in condensation. Therefore, it should be checked whether the connecting joints are airtight, as otherwise drafts can occur. Was a so-called blower door test carried out by the builder before handover? And how is the thermal insulation of the roof terrace above designed?
However, the problem could have multiple causes simultaneously. For example, in addition to insufficient thermal insulation in the shutter box, condensation could also occur on the front side of the reinforced concrete slab of the roof terrace due to inadequate insulation of the reinforced concrete slab of the façade.
Have a nice evening
It is naturally difficult to provide a solid diagnosis from a distance without an inspection.
Based on your description, this is likely a condensation issue. Shutter boxes often pose a risk of thermal bridging. That’s why they are usually made from rigid polystyrene foam with additional thermal insulation. For example, if the insulation on the outward and upper-facing sides is damaged or missing, a thermal bridge forms, leading to condensation. Another common problem is the airtightness of the wall and ceiling connections around the shutter boxes. Due to convection, the component’s temperature drops, resulting in condensation. Therefore, it should be checked whether the connecting joints are airtight, as otherwise drafts can occur. Was a so-called blower door test carried out by the builder before handover? And how is the thermal insulation of the roof terrace above designed?
However, the problem could have multiple causes simultaneously. For example, in addition to insufficient thermal insulation in the shutter box, condensation could also occur on the front side of the reinforced concrete slab of the roof terrace due to inadequate insulation of the reinforced concrete slab of the façade.
Have a nice evening
Similar topics