Hello everyone,
We are currently planning the construction of a solid brick house (urban villa with 160 sqm (1722 sq ft)), with two full floors plus a basement, without KfW funding. The standard option with the general contractor includes 36.5 cm (14 inches) porous S9 bricks without integrated insulation (Lambda value 0.09) with a two-layer plaster, no external thermal insulation composite system (ETICS) => U-value 0.23 W/(m²K).
Now we have the option to choose TV7 bricks (Lambda value 0.07) with integrated insulation instead, for an additional cost of nearly 5000 euros => U-value 0.23 W/(m²K).
Is this additional cost worth it?
It is also not yet decided whether to install a ventilation system with heat recovery (additional cost 7000 euros). Our concern here is not the comfort it provides but really the efficiency and cost-benefit factor. Is a ventilation system really necessary to avoid moisture problems? I am not asking about the comfort of ventilating three times a day, but rather whether anyone has experienced mold issues in a relatively new house due to the absence of a ventilation system, especially if windows were only opened once or twice occasionally.
Thank you in advance for your information and opinions.
We are currently planning the construction of a solid brick house (urban villa with 160 sqm (1722 sq ft)), with two full floors plus a basement, without KfW funding. The standard option with the general contractor includes 36.5 cm (14 inches) porous S9 bricks without integrated insulation (Lambda value 0.09) with a two-layer plaster, no external thermal insulation composite system (ETICS) => U-value 0.23 W/(m²K).
Now we have the option to choose TV7 bricks (Lambda value 0.07) with integrated insulation instead, for an additional cost of nearly 5000 euros => U-value 0.23 W/(m²K).
Is this additional cost worth it?
It is also not yet decided whether to install a ventilation system with heat recovery (additional cost 7000 euros). Our concern here is not the comfort it provides but really the efficiency and cost-benefit factor. Is a ventilation system really necessary to avoid moisture problems? I am not asking about the comfort of ventilating three times a day, but rather whether anyone has experienced mold issues in a relatively new house due to the absence of a ventilation system, especially if windows were only opened once or twice occasionally.
Thank you in advance for your information and opinions.
Small formats are hardly used anymore for exterior walls today. The grip holes are usually oval and, in terms of sound insulation, tend to strengthen rather than weaken. The idea that mass equals soundproofing is a simplistic misconception—but I have mentioned this so many times that I won’t repeat it here.
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S
Susanne N.23 May 2019 09:20Topic: Noise Protection
Does anyone happen to know which walls provide better noise insulation/soundproofing: the walls of wooden prefabricated houses (Danwood, Hanse Haus...) or the walls of solid houses (made of aerated concrete) from Town&Country houses?
Does anyone happen to know which walls provide better noise insulation/soundproofing: the walls of wooden prefabricated houses (Danwood, Hanse Haus...) or the walls of solid houses (made of aerated concrete) from Town&Country houses?
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