More Building a Net-Positive House
GBA is following a build in Upstate New York with Ben Bogie of BPC Green Builders. This is the second episode in an 11-part video series covering all aspects of the project’s construction—from foundation to stucco finish. Here, Ben explains how foundation waterproofing is handled with a liquid-applied coating at the top of the footing for a capillary break between the foundation and wall; it is also applied on the exterior of the ICCF block system. In combination with exterior mineral wool board, which provides a few different benefits, the method ensures a dry crawlspace.
Ben Bogie is a second-generation high-performance-building obsessive working as a project manager for BPC Green Builders of Wilton, CT.
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4 Comments
Can you talk a little more about the geotex mesh? how far does it need to protrude out from the foundation? who makes it? is it just installed on the long walls? can it be used in other applications? is it the only system for retaining against the soil thrust?
The next detail will be about the geotextile fabric; it will post next Monday at 2pm.
The geogrid secured to the footing makes absolutely no sense to me. It's the basement WALL that will want to move due to the pressure from the backfill, not the footing. The footing isn't going anywhere. It will be the wall to footing connection that will fail.
Why did you use the 2" of mineral wool instead of a simpler and less costly dimple matt to achieve the drainage down the foundation wall? Is the site dry most of the time so the mineral wool will provide added R value? If it is a mainly wet site the r value of mineral wool is close to zero when wet.
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