我需要这样的产品水隙之间的基础ment wall and the foam board insulation?
![](https://secure.gravatar.com/avatar/242ed1b269676c303507694ed8886471?s=52&d=https%3A%2F%2Fdwbcgjjbfqbp3.cloudfront.net%2Fapp%2Favatars%2F200x200%2Fc.png&r=g)
Mystic CT NZE house. I am applying a foil faced polyiso board (2.5″) on concrete basement walls. Do I need a product like Obdyke Hydrogap between the basement wall and the foam board insulation?
GBA Detail Library
A collection of one thousand construction details organized by climate and house part
![](http://m.etiketa4.com/app/themes/greenbuildingadvisor/dist/img/modules/detail-library/thumb1.png)
![](http://m.etiketa4.com/app/themes/greenbuildingadvisor/dist/img/modules/detail-library/thumb2.png)
Replies
Courtney,
Q. "Do I need a product like Obdyke Hydrogap between the basement wall and the foam board insulation?"
A. No. For more information, seeHow to Insulate a Basement Wall.