ᐅ Single-family house without a basement – creating additional usable space elsewhere
Created on: 26 Mar 2018 14:43
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EnnoBecker
Hello everyone,
We are building our single-family house without a basement with the following specifications:
Gable roof with a 45° pitch
Knee wall 1m (3.3 ft)
Living area: 148 m² (1,593 sq ft)
House dimensions: 8.95m x 11.32m (29.4 ft x 37.2 ft)
We want to compensate for the lack of storage space from the missing basement through the following measures:
I have questions regarding the following points:
1 - Attic:
This is a cold roof, meaning the floor between the upper floor and attic is insulated with mineral wool and has a vapor barrier in between.
The goal is to create more storage space. The attic is not intended to be used as living space.
For this purpose, I want to use tongue-and-groove boards, as these are vapor permeable compared to OSB panels and therefore prevent issues with rising moisture from the upper floor.
Questions:
The attached picture is provided as an example.
2 - Garage
The garage is planned to be 3.45m (11.3 ft) wide and 9m (29.5 ft) long. Inside the garage, a partition wall will be installed to separate the parking space from a storage area. Do you have recommendations for manufacturers or personal experience with this?
Thank you for your help.
Best regards,
Enno
We are building our single-family house without a basement with the following specifications:
Gable roof with a 45° pitch
Knee wall 1m (3.3 ft)
Living area: 148 m² (1,593 sq ft)
House dimensions: 8.95m x 11.32m (29.4 ft x 37.2 ft)
We want to compensate for the lack of storage space from the missing basement through the following measures:
- Make the attic accessible
- Build an extended single garage
- Build a spacious garden shed
I have questions regarding the following points:
1 - Attic:
This is a cold roof, meaning the floor between the upper floor and attic is insulated with mineral wool and has a vapor barrier in between.
The goal is to create more storage space. The attic is not intended to be used as living space.
For this purpose, I want to use tongue-and-groove boards, as these are vapor permeable compared to OSB panels and therefore prevent issues with rising moisture from the upper floor.
Questions:
- So far, a pull-down attic ladder is planned. My wife prefers a fixed space-saving staircase with a railing for easier access. In my view, this should be no problem as long as the access hatch to the attic remains insulated. Are there suitable solutions for this?
- We would also like to dry wet laundry in the attic. In our case, is this unproblematic? I believe the evaporated moisture could easily escape.
- What do you think, how much effectively usable floor area would this create?
- Do you have any personal experience with this?
The attached picture is provided as an example.
2 - Garage
The garage is planned to be 3.45m (11.3 ft) wide and 9m (29.5 ft) long. Inside the garage, a partition wall will be installed to separate the parking space from a storage area. Do you have recommendations for manufacturers or personal experience with this?
Thank you for your help.
Best regards,
Enno
hemali2003 schrieb:
I really don’t know anyone who ventilates their attic... And what kind of "odor" do you notice when you open the attic hatch?
hemali2003 schrieb:
But I have to crawl into the attic half a dozen times a day to ventilate it? It doesn’t necessarily have to be done manually there either.
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Caspar202028 Mar 2018 18:2411ant schrieb:
And what kind of "bad smell" do you notice when you open the stair hatch?For us, it smells dry and woody, usually a bit dusty so far.
We have now painted the drywall panels to make it a bit cleaner.
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hemali200328 Mar 2018 18:33As I said, I always thought that the draft there was sufficient for ventilation... I will ask the construction company again to see what they recommend...
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Knallkörper28 Mar 2018 18:34Caspar2020 schrieb:
Since 1997, we have had a true warm roof (18cm (7 inches) insulation between the rafters; vapor barrier on the room side, covered with drywall) and the ceiling between floors is also insulated (vapor barrier towards the living spaces). The beams are covered with tongue-and-groove boards.
We have a round window in the gable (which is rarely open) and a standard hatch with a pull-down ladder (so no insulated or special version).
The whole setup was designed by the architect and carried out by the builder.
No moisture problems or mold have been detected so far.
(It should be noted that the drywall boards help regulate moisture.)From my perspective, this is not a proper professional installation. Your attic is not heated, if I understand correctly, so you do not actually have a warm roof. By insulating the top floor ceiling, you create a significant temperature difference between the upper floor and the attic, which also increases the vapor pressure difference, and therefore moisture movement.
K
Knallkörper28 Mar 2018 18:36hemali2003 schrieb:
As I said, I always thought the draft there was enough for ventilation... I will ask the construction company again to see what they recommend...If there is a draft there, everything should be fine.
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Caspar202028 Mar 2018 18:43Knallkörper schrieb:
Your attic is not heated,Yep. Not heated.
Knallkörper schrieb:
From my point of view, this is not a professional executionI will mention that to the architect soon.
Knallkörper schrieb:
By insulating the top floor ceiling, you have a significant temperature gradient between the upper floor and the attic, and thus also a higher vapor pressure difference, meaning moisture transportThat’s why there is a vapor barrier on the room side in the upper floor. But it’s not that much colder in the attic. However, I don’t know how much insulation and its quality was installed in the intermediate ceiling. The construction description from back then only specified the roof with 18cm (7 inches) at 0.035.
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