ᐅ New Construction – Is Insulation Worthwhile? Experiences?
Created on: 22 Jan 2023 15:03
H
Hausbau189
Good day, esteemed experts,
We are currently building our single-family house. It is being constructed using solid masonry (T9 unfilled 36.5), with a living area of approximately 290sqm (3120 sq ft) spread over three floors.
The roof will be insulated with about 24cm (9.5 inches) internally and 5cm (2 inches) externally.
We will heat the house using a geothermal heat pump (underfloor heating). Additionally, the house will be equipped with a controlled mechanical ventilation system. It should also be mentioned that we will have a fireplace (mainly for the ambiance). A photovoltaic system will be installed on the roof, potentially covering the entire surface area. The question now is whether it makes sense to additionally insulate the exterior walls (ETICS / external wall insulation system)?
We are not building to KfW standards…
Please do not be too harsh in your judgment ;-)
I could not find an answer to my question through the search function.
Our goal is to achieve good insulation in summer and, of course, to minimize heating costs.
Thank you for your kind exchange.
Best regards
We are currently building our single-family house. It is being constructed using solid masonry (T9 unfilled 36.5), with a living area of approximately 290sqm (3120 sq ft) spread over three floors.
The roof will be insulated with about 24cm (9.5 inches) internally and 5cm (2 inches) externally.
We will heat the house using a geothermal heat pump (underfloor heating). Additionally, the house will be equipped with a controlled mechanical ventilation system. It should also be mentioned that we will have a fireplace (mainly for the ambiance). A photovoltaic system will be installed on the roof, potentially covering the entire surface area. The question now is whether it makes sense to additionally insulate the exterior walls (ETICS / external wall insulation system)?
We are not building to KfW standards…
Please do not be too harsh in your judgment ;-)
I could not find an answer to my question through the search function.
Our goal is to achieve good insulation in summer and, of course, to minimize heating costs.
Thank you for your kind exchange.
Best regards
WilderSueden schrieb:
Of course, using aerated concrete with an external thermal insulation composite system (ETICS) makes little sense. It combines the disadvantages of both methods and only has the advantage that aerated concrete is easy to cut to size. Functional drawbacks for the homeowner are one thing, but on the other hand, there seem to be optimized costs (for both parties).
The aerated concrete used is likely cheaper than a comparable calcium silicate brick. Due to its (slight) insulating effect, it saves a few centimeters (inches) of insulation thickness in the insulation layer. This results in a solidly built house with a relatively thin wall construction, which on paper leads to more living space with the same building volume.
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WilderSueden24 Jan 2023 10:35Sure, the benefits mostly favor the contractor. However, our Town & Country representative was definitely not convinced. "This position is to prevent any defects on the wall." The additional cost was also relatively reasonable, so I would guess that this wall construction, while standard on paper, is often not actually implemented.