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
Hausbau189 schrieb:
The house is already halfway built… Therefore, I unfortunately cannot use thicker or insulated blocks.
Is this enough to cover the „current“ status or to meet the current technical standards? As part of the building permit/planning permission process, an energy consultant will have prepared a thermal insulation certificate. This involves calculating the entire building envelope, which must comply with the current building regulations. So yes, it should meet the state of the art; otherwise, it would not have been approved.
Hausbau189 schrieb:
Budget for the house only is about 500,000 Do you have a fixed price for the house, or are you contracting individual trades separately?
The budget seems quite low for this living area.
Adding external wall insulation (EWI) "at short notice" now seems bold, especially since the roof structure is already in place. This means nothing will fit properly at critical intersections like doors, windows, roof overhangs, etc. The plasterer will also have to completely rethink the approach (submit a new offer), as plastering directly on the existing masonry is very different from plastering on EWI (the latter will likely be more expensive ;-)
And yes, the monolithic construction certainly has weaknesses in terms of summer heat protection. It is now urgent to learn more about the project. Only then can passive solutions like external blinds, shutters, awnings, etc. be considered.
And yes, the monolithic construction certainly has weaknesses in terms of summer heat protection. It is now urgent to learn more about the project. Only then can passive solutions like external blinds, shutters, awnings, etc. be considered.
H
Hausbau18922 Jan 2023 16:47We assign everything individually. So far, we do very little ourselves.
Up to now, we are on track with our planning.
What we have confirmed: shell construction, roof, heating + controlled ventilation system, windows, doors, screed, plumbing, electrical work, photovoltaic system, staircase, …
There are often significant differences between the quotes, of course you have to compare apples to apples. Direct contacts with the individual tradespeople often help…
But we are getting off topic.
Thank you for your opinions.
Up to now, we are on track with our planning.
What we have confirmed: shell construction, roof, heating + controlled ventilation system, windows, doors, screed, plumbing, electrical work, photovoltaic system, staircase, …
There are often significant differences between the quotes, of course you have to compare apples to apples. Direct contacts with the individual tradespeople often help…
But we are getting off topic.
Thank you for your opinions.
H
Hausbau18922 Jan 2023 16:51The roof structure is not up yet, it’s just on the plan.
We have talked with the plasterer, and the topic came up. He can of course also do it ;-)
And he said it would be recommendable ;-)
We have planned the passive elements – roller shutters or blinds
We have talked with the plasterer, and the topic came up. He can of course also do it ;-)
And he said it would be recommendable ;-)
We have planned the passive elements – roller shutters or blinds
All the more interesting for the forum to have your project presented. I’m sure many questions will come up later as well.
Is it fully finished living space or partly “just” utility space? That would be absolutely record-breaking in terms of price per square meter (square foot) ;-)
As I said, we’re all sitting here eagerly waiting for your project! 8-)
Is it fully finished living space or partly “just” utility space? That would be absolutely record-breaking in terms of price per square meter (square foot) ;-)
As I said, we’re all sitting here eagerly waiting for your project! 8-)
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