ᐅ Wood-Aluminum Windows: Key Factors to Consider

Created on: 16 Feb 2021 13:27
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EvaRooo
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EvaRooo
16 Feb 2021 13:27
Hello everyone,
My husband and I are about to purchase windows for our new build.
We want wood-aluminum windows made from spruce wood. We have received several offers and talked to some acquaintances as well as researched online what to look for regarding quality. Unfortunately, we are still not much wiser.

Our preferred options differ mainly in two aspects:
Offer A: Aluminum cladding has a mechanical corner joint, and the wood is made of triple-glued laminated timber
Offer B: Aluminum cladding has a welded corner joint, and the wood is made from a single piece of wood

1. According to people we know, a welded joint is considered higher quality
2. Online, I noticed that most suppliers use triple-glued laminated wood and advertise better stability and therefore longer durability

We have already visited houses with windows installed by both companies, and they looked good and high-quality. However, we do not have long-term experience, and the durability of the windows is very important to me.

If anyone can provide insights on these points, I would be very grateful.
11ant16 Feb 2021 14:44
First, regarding your question in the title ("what to watch out for"): make sure they are more expensive than pure aluminum windows, otherwise they won’t be good, meaning they won’t offer the desired high quality. I used to be an aluminum window manufacturer myself, and we wanted to include products made of other materials from different manufacturers in our range. For wood-aluminum windows, we would have only dared to work with Pax AG (after all, you don’t want to ruin your reputation). Search the forum for "wood-aluminum" or "wood/aluminum" by "11ant" to find my posts with explanations.
EvaRooo schrieb:

Offer B: aluminum cladding has a welded corner joint, wood is made from a single piece
1. According to statements in our circle of acquaintances, a welded connection is considered higher quality
2. On the internet, I found that most suppliers use triple-glued wood and advertise better stability and therefore longer durability when comparing windows

A second quality indicator after price (index: about 140 compared to 120 for pure aluminum, 100 for PVC, and 70 for discount PVC) is the corner joints of the aluminum cladding: welded is not higher quality, but rather stupid (because the joint gap is important to compensate for different coefficients of thermal expansion—the incompetent suppliers all advertise welded joints as an "advantage"). The glued wood is not more stable, only roughly equally good; the advantage (not for the customer but for the manufacturer) lies in production.
By the way, aluminum windows can also be laminated with decorative finishes that impress even professionals.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
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Bookstar
16 Feb 2021 14:51
Important: Aluminum on the outside and wood on the inside. Not the other way around!
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EvaRooo
16 Feb 2021 16:55
11ant schrieb:

First, regarding your question in the title ("what to pay attention to"): the main point is that they are more expensive than pure aluminum windows; otherwise, they won’t be any good, meaning they won’t offer the desired high quality. I was myself a manufacturer of aluminum windows, and we wanted to include products made from other materials from different suppliers in our range. For wood-aluminum windows, we would only have trusted PAX AG (after all, you don’t want to ruin your reputation). Search for "wood-aluminum" and "wood/aluminum" by "11ant" here in the forum search, and you’ll find my posts with explanations.

A second quality indicator after price (index: about 140 compared to 120 for pure aluminum, 100 for PVC, and 70 for discount PVC) is the corner joints of the aluminum cladding: welded is not higher quality, but stupid (because the gaps are important to compensate for the different coefficients of expansion – incompetent suppliers all advertise welded joints as an "advantage"). The glued wood is not more stable, just about equally good; the advantage (not for the customer, but for the manufacturer) lies in production.
By the way, aluminum windows can also be foil-coated – with designs that even impress professionals.

Regarding pricing, that’s roughly correct. We’ve had offers for other windows as well.

Okay, that sounds reasonable. Is the welded version cheaper to produce, or why is it presented as an advantage?

Since we are building a timber house with a lot of visible wood, only real wood or something completely different is an option 🙂
11ant16 Feb 2021 17:02
EvaRooo schrieb:

Since we are building a wooden house with a lot of exposed wood, only real wood or something completely different comes into question.

Well, then I would choose aluminum—possibly frameless (Solarlux) for the patio doors. Why don’t you show the house with the windows? :-)
EvaRooo schrieb:

Is the welded version cheaper to produce, or why is it promoted as an advantage?

The flaw doesn’t cost much, but it works very well as a quality-sales argument due to naive “logic”: those who don’t know that and why it is inferior easily assume it is a better design.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
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Snowy36
17 Feb 2021 13:25
Besides the appearance, don’t forget about the function....

Contrary to popular belief, triple-glazed windows with standard specifications nowadays have worse sound insulation (dB) than old double-glazed windows.

As a homeowner, you might think, “Well, I live in a quiet village, so I don’t need soundproof windows.”

But you do. I would recommend at least 36 or 39 dB instead of the standard 32 dB...

Otherwise, you’ll wonder later why your new house is so much noisier than your previous one from the 1970s.