Hello,
we want to install a wood-burning stove in our house. Since we do not have a chimney yet, one must be retrofitted first. The planned fireplace is not located on an exterior wall, so from our point of view only a lightweight chimney system is an option.
Because we have a bungalow with a timber frame construction and no attic, the roof (25º) connects directly to the living space. Therefore, the lightweight chimney will be routed through the roof approximately 40 cm (16 inches) beside the ridge on an interior wall (made of Fermacell with fiberglass wallpaper) in the living room. The chimney will be about 3.50 m (11.5 feet) high inside the living area and about 1.50 m (5 feet) above the roof. The pipe diameter will be 150 mm (6 inches), and above the roof, the chimney will be finished as a pipe in an RAL color matching the roof tiles.
We have already talked to the local chimney sweep, and from his point of view, this can be realized. We will receive the installation permit shortly, and the installation will of course be done by a professional company.
Now to my questions.
1. Is it possible to install a lightweight chimney under these conditions without major renovation work afterwards? I imagine the chimney will be built, then plastered or filled, without needing to re-wallpaper the wall behind it.
2. What must be considered when routing the chimney through the roof? How should this be done so that the insulation properties are maintained and no thermal bridge occurs? Also, how should the vapor barrier and the breathable roofing underlay be connected to the chimney to prevent moisture penetration and thus avoid mold growth?
The roof structure from inside to outside is as follows:
16x110 mm (0.6x4.3 inches) spruce tongue-and-groove boards > 12.5 mm (0.5 inch) fire-resistant gypsum board > 20 mm (0.8 inch) wooden battens > 0.20 mm (0.008 inch) PE foil as vapor barrier > 250 mm (10 inches) mineral insulation > 45x245 mm (1.8x9.6 inches) rafters > breathable roofing underlay > 25 mm (1 inch) counter battens > 38x58 mm (1.5x2.3 inches) battens > roof tiles
3. The chimney sweep intends to clean the chimney once a year from the roof. How much dirt is typically produced during cleaning, considering that the cleaning hatch will be located right in our living room?
I am looking forward to your answers.
Best regards,
jochen35
we want to install a wood-burning stove in our house. Since we do not have a chimney yet, one must be retrofitted first. The planned fireplace is not located on an exterior wall, so from our point of view only a lightweight chimney system is an option.
Because we have a bungalow with a timber frame construction and no attic, the roof (25º) connects directly to the living space. Therefore, the lightweight chimney will be routed through the roof approximately 40 cm (16 inches) beside the ridge on an interior wall (made of Fermacell with fiberglass wallpaper) in the living room. The chimney will be about 3.50 m (11.5 feet) high inside the living area and about 1.50 m (5 feet) above the roof. The pipe diameter will be 150 mm (6 inches), and above the roof, the chimney will be finished as a pipe in an RAL color matching the roof tiles.
We have already talked to the local chimney sweep, and from his point of view, this can be realized. We will receive the installation permit shortly, and the installation will of course be done by a professional company.
Now to my questions.
1. Is it possible to install a lightweight chimney under these conditions without major renovation work afterwards? I imagine the chimney will be built, then plastered or filled, without needing to re-wallpaper the wall behind it.
2. What must be considered when routing the chimney through the roof? How should this be done so that the insulation properties are maintained and no thermal bridge occurs? Also, how should the vapor barrier and the breathable roofing underlay be connected to the chimney to prevent moisture penetration and thus avoid mold growth?
The roof structure from inside to outside is as follows:
16x110 mm (0.6x4.3 inches) spruce tongue-and-groove boards > 12.5 mm (0.5 inch) fire-resistant gypsum board > 20 mm (0.8 inch) wooden battens > 0.20 mm (0.008 inch) PE foil as vapor barrier > 250 mm (10 inches) mineral insulation > 45x245 mm (1.8x9.6 inches) rafters > breathable roofing underlay > 25 mm (1 inch) counter battens > 38x58 mm (1.5x2.3 inches) battens > roof tiles
3. The chimney sweep intends to clean the chimney once a year from the roof. How much dirt is typically produced during cleaning, considering that the cleaning hatch will be located right in our living room?
I am looking forward to your answers.
Best regards,
jochen35
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