Hello,
we are considering having the windows of our 1980s house renovated by a professional company. They are wooden windows with double glazing. You can clearly feel drafts on many of them. The company specializes in this type of work. They come with a workshop van, take the windows off the frames, mill a groove all around, and install an additional seal. Then they rehang and adjust the windows so they close properly again, especially where there was warping, and if necessary, they replace any damaged hardware.
So far, I assumed that this could qualify for funding from BAFA (Efficient Buildings - funding for individual measures). I’ve already asked via their contact form and received confirmation that windows, as part of the building envelope, are eligible for funding. Of course, this is not a binding statement.
Now the company came for an estimate and they say they have a lot of experience and there is definitely no funding for this. Funding would only be available if you replace the panes, which they, like me, do not consider economical. For funding, you mainly need to provide figures on how much energy is saved, which is not possible because every window is different, and so on.
I have not yet contacted an energy consultant.
Does anyone perhaps have more information?
The estimate amounts to about 6800 € (around 6800 euros). Whether I can save that amount in the long run, making it economically viable, is another question I might ask in a separate thread.
Best regards,
Tobi
we are considering having the windows of our 1980s house renovated by a professional company. They are wooden windows with double glazing. You can clearly feel drafts on many of them. The company specializes in this type of work. They come with a workshop van, take the windows off the frames, mill a groove all around, and install an additional seal. Then they rehang and adjust the windows so they close properly again, especially where there was warping, and if necessary, they replace any damaged hardware.
So far, I assumed that this could qualify for funding from BAFA (Efficient Buildings - funding for individual measures). I’ve already asked via their contact form and received confirmation that windows, as part of the building envelope, are eligible for funding. Of course, this is not a binding statement.
Now the company came for an estimate and they say they have a lot of experience and there is definitely no funding for this. Funding would only be available if you replace the panes, which they, like me, do not consider economical. For funding, you mainly need to provide figures on how much energy is saved, which is not possible because every window is different, and so on.
I have not yet contacted an energy consultant.
Does anyone perhaps have more information?
The estimate amounts to about 6800 € (around 6800 euros). Whether I can save that amount in the long run, making it economically viable, is another question I might ask in a separate thread.
Best regards,
Tobi
In the 1980s, window seals were common. If the existing approximately 40-year-old central seals are professionally replaced, the windows can be restored to good condition and often become just as airtight as new windows!
Of course, this applies only if the windows can also be properly overhauled and maintained (painting/hardware/etc.).
Adding additional compression seals on the sash on the room side in old, approximately 40-year-old windows can be useful in some cases. However, this provides only minor benefits if the house has been or will be significantly upgraded in terms of energy efficiency (insulation + airtightness).
As a standalone measure, it is almost ineffective.
Replacing glass with modern standard double glazing that includes Low-E coating, thermally improved edge spacers, and gas fill (Ug 1.1) improves thermal performance and is essential (this is often eligible for subsidies!).
The difference between standard double glazing (Ug approximately 2.7–2.9 W/m²K) and insulated glazing units with Ug 1.1 is considerable!
A consultation with an energy advisor is mandatory.
If weatherstripping channels (thermally improved, with glazing bead covers) are also installed, the windows can be brought up to a level comparable to nearly modern standard windows.
Of course, this applies only if the windows can also be properly overhauled and maintained (painting/hardware/etc.).
Adding additional compression seals on the sash on the room side in old, approximately 40-year-old windows can be useful in some cases. However, this provides only minor benefits if the house has been or will be significantly upgraded in terms of energy efficiency (insulation + airtightness).
As a standalone measure, it is almost ineffective.
Replacing glass with modern standard double glazing that includes Low-E coating, thermally improved edge spacers, and gas fill (Ug 1.1) improves thermal performance and is essential (this is often eligible for subsidies!).
The difference between standard double glazing (Ug approximately 2.7–2.9 W/m²K) and insulated glazing units with Ug 1.1 is considerable!
A consultation with an energy advisor is mandatory.
If weatherstripping channels (thermally improved, with glazing bead covers) are also installed, the windows can be brought up to a level comparable to nearly modern standard windows.
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