Choosing who makes your windows is a bigger decision than choosing the windows. Here's how to judge a manufacturer properly.
The first question is whether you're talking to the people who actually fabricate the window or to a reseller who'll pass your job to a fabricator you never meet. Buying from the maker removes a layer of margin and, more importantly, a layer of blame-shifting if anything goes wrong.
Vague superlatives (“best”, “number one”) with nothing specific behind them are a warning. So is a reluctance to say which profile they use, or who actually fits. A maker confident in their work will answer all of it plainly.
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