ᐅ Construction method: 36.5 cm aerated concrete or 17.5 cm masonry with 14 cm external insulation (ETICS/EWI)
Created on: 1 Apr 2017 11:50
M
MaJess
Hello,
we are currently deciding on a construction company. Our main question right now is how we should build our house. We have one offer with a 36.5 cm (14 inch) aerated concrete wall with plaster, and another offer with a 17.5 cm (7 inch) aerated concrete wall plus 14 cm (5.5 inch) external thermal insulation composite system (ETICS) using mineral textured plaster as the top coat with a 2 mm (0.08 inch) grain size, and a base plaster with colored stone plaster as the top coat.
We are very inexperienced with building and do not know which option is better. The house will be built in a quiet village with no traffic noise. It is important for us that we do not have high heating costs, but that the walls can breathe and there is no risk of mold growth.
We appreciate any tips and advice.
The heating system in offer 1 would be gas plus solar, while offer 2 includes an air-to-water heat pump.
Best regards
we are currently deciding on a construction company. Our main question right now is how we should build our house. We have one offer with a 36.5 cm (14 inch) aerated concrete wall with plaster, and another offer with a 17.5 cm (7 inch) aerated concrete wall plus 14 cm (5.5 inch) external thermal insulation composite system (ETICS) using mineral textured plaster as the top coat with a 2 mm (0.08 inch) grain size, and a base plaster with colored stone plaster as the top coat.
We are very inexperienced with building and do not know which option is better. The house will be built in a quiet village with no traffic noise. It is important for us that we do not have high heating costs, but that the walls can breathe and there is no risk of mold growth.
We appreciate any tips and advice.
The heating system in offer 1 would be gas plus solar, while offer 2 includes an air-to-water heat pump.
Best regards
Casement ventilation means that where the profiles of the window frame and the sash meet (and a gap in two dimensions is inevitable), specific channels are designed to allow air to flow through. This effectively makes the window "intentionally leaky" to compensate for the drawbacks of overly good insulation. Simplified, the insulation is made just imperfect enough so that it does not cause problems.
Sort of. Each type of brick has slightly different properties, but the fundamental choice between “solid brick” and “thinner brick plus ETICS” does not really change because of that.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
MaJess schrieb:
I still have one question: does it make a difference if I choose expanded clay aggregate 15–20 cm (6–8 inches) with external thermal insulation composite system (ETICS)?
Sort of. Each type of brick has slightly different properties, but the fundamental choice between “solid brick” and “thinner brick plus ETICS” does not really change because of that.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
MaJess schrieb:
So, if I choose the thicker masonry wall, does that mean a trickle vent in the windows is not necessary and simply ventilating by opening windows is theoretically sufficient?I think it has already been mentioned. Nowadays, buildings must be airtight regardless of the construction method. It doesn’t matter if it’s thick masonry or thin masonry, external insulation systems or solid walls, calcium silicate brick or cheap aerated concrete... airtightness is mandatory.
The decision for or against a ventilation system or window trickle vents (which I personally find quite pointless) does not depend on the wall construction. Invest the money in a proper ventilation system—you won’t regret it. Indoor comfort improves significantly with a constant supply of fresh air, whether in the morning, in rooms of teenage kids, or with flatulent dogs, etc. And the annoying need for manual window ventilation disappears if you don’t feel like doing it.
Here, worlds collide—clash of civilizations. In our home, the bedroom window is only ever closed in freezing weather. The bathroom window is always slightly open. And in the morning, the first thing is opening the kitchen patio door, then doing a few squats outside in a T-shirt in any weather except deep snow, followed by coffee while listening to the birds. Then letting the cat out, or in if it was outside during the night. I would never, ever have any kind of artificial ventilation system installed in the house.
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