ᐅ Proper Execution of Thermal Separation Between House and Garage
Created on: 2 May 2020 18:52
H
HarakiriHello everyone,
we are currently working on the final details of the building planning for our small house, and there are a few issues where I am not quite sure what the best approach is.
Primarily, I am concerned about the correct execution of the thermal separation between the house and the garage. The house is to be built on a (slight) slope, with the basement/lower ground floor almost embedded into the hill on the north side, while the south side will be completely open—everything to be constructed with waterproof concrete, assuming 24 cm (10 inches) walls (prefabricated walls + in-situ concrete) plus 14 cm (5.5 inches) XPS perimeter insulation. On top of this will stand a timber frame prefabricated house with 1.5 floors. The basement/lower ground floor is planned to include a living area/secondary apartment and a utility/technical room, all within the thermal envelope—the target standard for the entire house is KfW 55 (this is important to us).
Next to this insulated area, directly adjoining and connected via a (fire-rated T30) door, will be the (preferably uninsulated) garage. If relevant, the garage roof will be accessible and greened, as the side entrance (garden access) of the house lies directly above it. For better orientation, I have attached a plan excerpt—although it still shows the garage as an insulated room, which I personally do not want.
The energy consultant stipulated that a separation between house and garage must be created, continuously through roof, walls, and slab. This separation should be insulated with 140 mm (5.5 inches) XPS panels. As a result, an additional wall will be installed on the garage side, thickness yet to be determined. The architect is not enthusiastic about this idea and would rather recommend a smaller gap with 2 cm (0.8 inches) insulation plus internal insulation.
From what I have read, the energy consultant’s approach seems to be the correct one, but I am unsure if it might bring its own problems.
For example, I do not know how the (condensation) moisture issue is handled in such a semi-“core insulation” design?
Are problems to be expected regarding differential settlement of the components? My idea was to insulate only the house’s slab (140 mm XPS) and leave the garage slab uninsulated.
How is such a building joint usually concealed? Can you simply plaster over it, or is something else required?
Has anyone planned and implemented something (similar), and if so, what are your experiences?
Are there possibly other solutions that also lead to Rome?
Thanks!
we are currently working on the final details of the building planning for our small house, and there are a few issues where I am not quite sure what the best approach is.
Primarily, I am concerned about the correct execution of the thermal separation between the house and the garage. The house is to be built on a (slight) slope, with the basement/lower ground floor almost embedded into the hill on the north side, while the south side will be completely open—everything to be constructed with waterproof concrete, assuming 24 cm (10 inches) walls (prefabricated walls + in-situ concrete) plus 14 cm (5.5 inches) XPS perimeter insulation. On top of this will stand a timber frame prefabricated house with 1.5 floors. The basement/lower ground floor is planned to include a living area/secondary apartment and a utility/technical room, all within the thermal envelope—the target standard for the entire house is KfW 55 (this is important to us).
Next to this insulated area, directly adjoining and connected via a (fire-rated T30) door, will be the (preferably uninsulated) garage. If relevant, the garage roof will be accessible and greened, as the side entrance (garden access) of the house lies directly above it. For better orientation, I have attached a plan excerpt—although it still shows the garage as an insulated room, which I personally do not want.
The energy consultant stipulated that a separation between house and garage must be created, continuously through roof, walls, and slab. This separation should be insulated with 140 mm (5.5 inches) XPS panels. As a result, an additional wall will be installed on the garage side, thickness yet to be determined. The architect is not enthusiastic about this idea and would rather recommend a smaller gap with 2 cm (0.8 inches) insulation plus internal insulation.
From what I have read, the energy consultant’s approach seems to be the correct one, but I am unsure if it might bring its own problems.
For example, I do not know how the (condensation) moisture issue is handled in such a semi-“core insulation” design?
Are problems to be expected regarding differential settlement of the components? My idea was to insulate only the house’s slab (140 mm XPS) and leave the garage slab uninsulated.
How is such a building joint usually concealed? Can you simply plaster over it, or is something else required?
Has anyone planned and implemented something (similar), and if so, what are your experiences?
Are there possibly other solutions that also lead to Rome?
Thanks!
Harakiri schrieb:
Are there possibly other routes that lead to Rome?But probably without a stop in Bielefeld Congratulations on the two 850i
Harakiri schrieb:
We are currently working on the final details of the building plan for our small house, and there are a few problem areas where I am not entirely sure what the right approach is.
Primarily, I am concerned with the correct implementation of the thermal separation between the house and the garage. That may seem like the main urgent issue from your perspective, but you know the entire project – we don’t. If you let us have a bit more insight into the overall plan, we might be able to give much better advice.https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
Um, no, better not, you might find more issues, and then we would have to redesign everything.
No, seriously, attached are the additional plans, including the full basement/lower ground floor, ground floor, and the side elevations, in case they might be helpful.
And no, the large cars are just placeholders. Luckily, I’m a golf player, so there will still be space in my future garage for a few bicycles.
No, seriously, attached are the additional plans, including the full basement/lower ground floor, ground floor, and the side elevations, in case they might be helpful.
And no, the large cars are just placeholders. Luckily, I’m a golf player, so there will still be space in my future garage for a few bicycles.
Harakiri schrieb:
Uh, no, better not. You might find more issues in it, and then we would have to redesign everything.You might be right - earliest update would be later tonight...https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
Regarding the patio doors around the dining table, I would reconsider which sash should be the operable, sliding part. For the door at the bottom of the plan, I would choose the right sash, which is closer to the kitchen, and for the door on the left side of the plan, I would choose the upper sash, which is closer to the sofa.
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