ᐅ Renovating an Older Building: Which Insulation Is Suitable for Exterior Walls and, If Needed, the Basement?
Created on: 28 Aug 2020 09:05
H
Holzwurm80
Hello,
I will soon start renovating my parents’ house.
Built in 1954 with brickwork, with a 1975 extension made of aerated concrete blocks, and a basement. The location used to be a marsh area, but the groundwater level has since dropped further. The basement is dry and there are no moisture issues.
I have an appointment with an energy consultant in two weeks, but I don’t want to go unprepared. Also because some specialists can be quite one-sided in their advice.
When replacing the pipes, I plan to excavate around the building and insulate the foundation at the same time.
From what I understand, the typical setup is masonry – damp proofing – XPS or a similar material. Is that current best practice?
What types of damp proofing are available?
Regarding the rest of the masonry, I’m not completely sure.
At a trade fair, I saw Poroton WDF blocks, which seem reliable, but their insulation values don’t appear to be great, especially considering the cost. Am I right or wrong about this?
I’m not keen on glass wool or rock wool, so I’m interested in wood fiber insulation boards like Steico or Gutex as an alternative.
Are these any good, or are there other options?
Of course, I know a professional will need to examine everything in detail, but I would be interested in your experiences to avoid any risk of mold developing in the building later on.
Thanks
I will soon start renovating my parents’ house.
Built in 1954 with brickwork, with a 1975 extension made of aerated concrete blocks, and a basement. The location used to be a marsh area, but the groundwater level has since dropped further. The basement is dry and there are no moisture issues.
I have an appointment with an energy consultant in two weeks, but I don’t want to go unprepared. Also because some specialists can be quite one-sided in their advice.
When replacing the pipes, I plan to excavate around the building and insulate the foundation at the same time.
From what I understand, the typical setup is masonry – damp proofing – XPS or a similar material. Is that current best practice?
What types of damp proofing are available?
Regarding the rest of the masonry, I’m not completely sure.
At a trade fair, I saw Poroton WDF blocks, which seem reliable, but their insulation values don’t appear to be great, especially considering the cost. Am I right or wrong about this?
I’m not keen on glass wool or rock wool, so I’m interested in wood fiber insulation boards like Steico or Gutex as an alternative.
Are these any good, or are there other options?
Of course, I know a professional will need to examine everything in detail, but I would be interested in your experiences to avoid any risk of mold developing in the building later on.
Thanks
N
nordanney28 Aug 2020 12:58Holzwurm80 schrieb:
Connection to the insulation had black walls, so I wanted to gather more impressions This is not caused by the insulation (regardless of the type). After installing insulation and new windows, the house is more airtight than before when the windows were drafty. If ventilation is neglected, mold can develop. This also applies to newly built houses.
The problem becomes more pronounced when drafty windows are replaced with new, airtight windows. Without proper ventilation, the moisture has nowhere to go and will condense. Cold exterior walls, especially in corners, are typical spots for this.
If mold appears after professional insulation work, in almost 100% of cases the cause is related to the occupant’s behavior.
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