Please recommend a folding door that's insulating

For interior decoration, I'm thinking of a folding door.

It's getting cold now, so it's important to insulate well.

Which folding door is good for insulation?

If you have any brands to recommend, please let me know

For some reason, I think you'll recommend the most expensive thing to go to the interior designer.

350 2018-10-31 Gentleman

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