ᐅ Wall construction: 15 cm calcium silicate brick plus 25 cm external thermal insulation composite system (ETICS)
Created on: 14 Nov 2020 07:47
K
Klaus23
Hello everyone,
Our detached single-family house KfW 40+ (9 x 16 m (30 x 52 feet), 2 floors with basement) is being built from sand-lime brick.
Interior walls are 11 cm (4.3 inches) or 15 cm (6 inches), exterior walls are 15 cm (6 inches) plus 25 cm (10 inches) of external thermal insulation composite system (ETICS).
The 15 cm (6 inches) exterior wall seems quite thin to me, especially considering the large rooms.
Of course, everything has been statically calculated and designed. Nevertheless, I would feel more comfortable with a 17.5 cm (7 inches) wall.
Are my concerns justified or unfounded?
Many thanks
Our detached single-family house KfW 40+ (9 x 16 m (30 x 52 feet), 2 floors with basement) is being built from sand-lime brick.
Interior walls are 11 cm (4.3 inches) or 15 cm (6 inches), exterior walls are 15 cm (6 inches) plus 25 cm (10 inches) of external thermal insulation composite system (ETICS).
The 15 cm (6 inches) exterior wall seems quite thin to me, especially considering the large rooms.
Of course, everything has been statically calculated and designed. Nevertheless, I would feel more comfortable with a 17.5 cm (7 inches) wall.
Are my concerns justified or unfounded?
Many thanks
guckuck2 schrieb:
Better have the requirement for 24cm (9.5 inches) of insulation reviewed – even for KfW 40. That sounds like overkill.Here, they’re even talking about twenty-five centimeters (10 inches), which to me sounds like a wall assembly taken straight from the U-value calculator for KfW standards.https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
11ant schrieb:
They even want twenty-five centimeters here, and to me that sounds exactly like "wall construction from the U-value calculator for KfW xy".He mentioned 25cm (10 inches), but that’s for the external thermal insulation composite system (ETICS). The plaster is included in that, especially since I haven’t come across any unusual material thicknesses so far.
guckuck2 schrieb:
He wrote 25cm (10 inches), but that was for the external thermal insulation composite system (ETICS). That also includes the plaster, especially since I haven’t encountered any odd material thicknesses so far.Yes, that’s exactly what I meant. Tomorrow I will ask the architect again whether the sand-lime brick wall can be increased to 17.5cm (7 inches).
guckuck2 schrieb:
He wrote 25cm (10 inches), but that’s for the external thermal insulation composite system (ETICS). That includes the render as well, especially since I haven’t encountered any unusual material thicknesses so far. It’s surprising that marketing hasn’t realized this yet: for a monolithic system, the render would be applied directly onto the masonry without an air gap, so you could actually call it a monolithic composite system *LOL*
Klaus23 schrieb:
Tomorrow I will ask the architect again if the sand-lime brick wall can be increased to 17.5cm (7 inches). Yes, it can, and that’s probably the reason for the 15cm (6 inches) — you get a better base price for 15cm and pay extra for 17.5cm ;-)
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
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