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Community and Q&A

Exterior doors that are well-insulated and seal well

Anna Johnson | Posted in Energy Efficiency and Durability on

Is there a place to compare exterior doors for energy efficiency and excellent seals? We are having trouble finding suitable doors for a very well insulated SIP house. The ones we got on a previous job are not adequate.

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  1. Jim Bannon | | #1

    We've had good luck with Andersen Frenchwood series door sealing systems. Even fiberglass ThermaTru doors aren't bad, for a fraction of the cost of the Andersens. But no door can even come close to the R-value of a SIP wall.

  2. Anna Johnson | | #2

    Is there any testing group that compares doors?

  3. GBA Editor
    Martin Holladay | | #3

    If you really care about the performance of your entry doors, you need a door that meets the Passivhaus standard.

    Jesse Thompson, an architect in Portland, Maine, is a fan of a brand of triple-glazed entry doors from Poland, Drewexim. These doors include German hardware and meet German air-sealing standards, but cost significantly less than German doors. Jesse pays between $1,750 and $2,000 each for these doors. They are distributed in Maine by Fenestration Plus of Bangor.

    More information on Passivhaus doors:

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