Are there any bi-fold exterior door vendors you’re happy with or would stay away from? There are surprisingly few reviews, especially from people who’ve had them awhile.

I’ve been getting quotes ranging from $6k to $25k for a folding 12’x80” wall (thermally broken aluminum, low e, tempered, argon, 4 panels with 1 everyday/swing door). The only clear difference is top vs bottom supported and it’s not obvious which is better since we can make either work.

Some more familiar brands have mixed reviews, other unknowns have either good or no reviews. (So far I’ve looked at Nanawall, Panoramic, La Cantina, Marvin, Teza, EZ Fold-A-Door, Milgard, Eris Home, Origen). Any recommendations?

This is for our pool house, replacing 2 sets of rotted French door. I want something that will last but doesn’t need to be the fanciest - saving that for our living room doors next year. 😜