Hello everyone,
We are currently planning a city villa and discussing wall construction with our architect. Our architect tends to take a pragmatic and cost-conscious approach. However, we have specific aesthetic preferences and sufficient budget.
The wall structure is currently planned as follows:
Calcium silicate brick 17.50 cm (7 inches)
Insulation 16.00 cm (6 inches)
Air gap ???
Basement concrete
Ground floor facing brick, dimensions 490x90x40 mm (19x3.5x1.6 inches)
Upper floor aerated concrete/plaster
For the upper floor, we would prefer plaster. Our architect initially suggested an external thermal insulation composite system (ETICS / external wall insulation). However, we want a cavity wall construction.
In addition, we do not want an aluminum drip edge.
The ground floor facing bricks have a special dimension with a depth (thickness) of only 9 cm (3.5 inches). Our idea was to place a sample aerated concrete block on top of this and then plaster over it. However, aerated concrete blocks are available only in 7.5 cm (3 inches) or 10 cm (4 inches) thickness. Would a 7.5 cm block plus 2.5 cm (1 inch) plaster be sufficient, or could this cause issues with frost resistance? Or would it be better to use calcium silicate bricks to keep the same system? What do you think?
To avoid using an aluminum profile, one could use an invisible plastic profile with a drip edge, which is available from several manufacturers. Of course, the transition between the facing brick and the plaster would need to be properly sealed to prevent water ingress.
Finally, there is the question of whether an air gap of 1–2 cm (0.4–0.8 inches) should be installed between the insulation and the facing brick/plaster.
At the moment, our architect has not found a solution, so we turn to the community for advice.
I look forward to hearing your assessments and experiences.
We are currently planning a city villa and discussing wall construction with our architect. Our architect tends to take a pragmatic and cost-conscious approach. However, we have specific aesthetic preferences and sufficient budget.
The wall structure is currently planned as follows:
Calcium silicate brick 17.50 cm (7 inches)
Insulation 16.00 cm (6 inches)
Air gap ???
Basement concrete
Ground floor facing brick, dimensions 490x90x40 mm (19x3.5x1.6 inches)
Upper floor aerated concrete/plaster
For the upper floor, we would prefer plaster. Our architect initially suggested an external thermal insulation composite system (ETICS / external wall insulation). However, we want a cavity wall construction.
In addition, we do not want an aluminum drip edge.
The ground floor facing bricks have a special dimension with a depth (thickness) of only 9 cm (3.5 inches). Our idea was to place a sample aerated concrete block on top of this and then plaster over it. However, aerated concrete blocks are available only in 7.5 cm (3 inches) or 10 cm (4 inches) thickness. Would a 7.5 cm block plus 2.5 cm (1 inch) plaster be sufficient, or could this cause issues with frost resistance? Or would it be better to use calcium silicate bricks to keep the same system? What do you think?
To avoid using an aluminum profile, one could use an invisible plastic profile with a drip edge, which is available from several manufacturers. Of course, the transition between the facing brick and the plaster would need to be properly sealed to prevent water ingress.
Finally, there is the question of whether an air gap of 1–2 cm (0.4–0.8 inches) should be installed between the insulation and the facing brick/plaster.
At the moment, our architect has not found a solution, so we turn to the community for advice.
I look forward to hearing your assessments and experiences.
S
Serena_Neubau12 Oct 2023 17:11This doesn’t seem to be so complicated after all. I’d like to briefly explain how it is being done now.
A 7 cm (2.8 inches) calcium silicate stone panel is installed onto the existing 9 cm (3.5 inches) brickwork. The calcium silicate panel is then coated with a 2.5 cm (1 inch) plaster layer to protect it from frost.
The calcium silicate panels are secured using brackets and support angles from the company Halfen.
A bitumen membrane is placed between the brickwork and the calcium silicate panel to seal the masonry.
A 7 cm (2.8 inches) calcium silicate stone panel is installed onto the existing 9 cm (3.5 inches) brickwork. The calcium silicate panel is then coated with a 2.5 cm (1 inch) plaster layer to protect it from frost.
The calcium silicate panels are secured using brackets and support angles from the company Halfen.
A bitumen membrane is placed between the brickwork and the calcium silicate panel to seal the masonry.
Serena_Neubau schrieb:
A 7 cm (2.8 inches) sand-lime brick panel will now be installed on top of the 9 cm (3.5 inches) facing brick. The sand-lime brick panel will then be covered with a 2.5 cm (1 inch) render to protect it from frost. First of all, thanks for the update; many questioners tend to forget that. If I understand correctly, above the brick cladding limit, the structure is continued with sand-lime brick (why use such heavy material?), essentially building up the sand-lime brick so that the facade ends up flush. That sounds like a stroke of genius worthy of a fool from Schilda ;-)
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
P.S.: Are you seriously planning to veneer with stones that are half a meter wide and 4cm (1.6 inches) thick?
1) How did you come up with this custom size (made only for you?)?
2) Are the usual mortar joints supposed to be 1cm (0.4 inches)?
3) I get dizzy just thinking about the breakage rate during transport;
4) How many people and what kind of equipment will it take to lay such massive pieces?
5) Won’t the veneering cost soon exceed the entire shell construction?
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
1) How did you come up with this custom size (made only for you?)?
2) Are the usual mortar joints supposed to be 1cm (0.4 inches)?
3) I get dizzy just thinking about the breakage rate during transport;
4) How many people and what kind of equipment will it take to lay such massive pieces?
5) Won’t the veneering cost soon exceed the entire shell construction?
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
S
Serena_Neubau12 Oct 2023 19:481) How did this special format (manufactured only for you?) come about? The format is offered by the brick manufacturer. So, it’s not really a special custom format.
2) Should the usual 1cm (0.4 inch) bed joints be used? Yes, that should be the case. When I looked at it, it was similar. Standard format bricks have 48 bricks per square meter, our format has 41 bricks per square meter.
3) I get dizzy just thinking about the breakage rate during transport; That was also a question for the brick manufacturer. According to them, the breakage rate is low. The brick manufacturer handles the transport themselves.
4) How many people and what equipment are needed to lay such heavy pieces? The bricks have holes in the middle. They are not that heavy.
5) Won’t the bricklaying soon cost more than the entire shell construction? Indeed, it is not exactly cheap. We have fired and steam-cured bricks. Additional costs compared to affordable bricks are about 20,000 euros for half a house. For the garage, the bricks are produced as thin brick slips to save costs.
Water-struck bricks in this format are about 30% more expensive.
The service from the brick manufacturer was very good. You might want to look up “Rheinischen Ringofen.”
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