Revisions log for Answer #2194
This is the answer to the question Untreated wooden windows – do such windows exist?
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2022‑09‑15 11:41
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Initial text
Since wood windows cannot be left untreated, the profiles are usually treated (such as with pressure impregnation) during production. So you would have to go to a supplier who also manufactures windows specifically for heritage sites.
But all in all, I doubt you'll find what you're looking for in the industrial window market.