Spray-On Air and Moisture Barrier In Action

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Spray-On Air and Moisture Barrier In Action

The results of a side-by-side comparison of house wrap and spray-on air and moisture barrier.
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Comparison of #housewrap and spray-on air and moisture barrier. http://3bl.me/4ykmp4 #buildingscience @StoCorp

Multimedia from this Release

Wednesday, September 16, 2015 - 9:00am

STO COATINGS AND AIR BARRIER DISTRIBUTOR, Miller Paint, was holding an event where Sto Corp.’s Dan Crates was demonstrating StoGuard. Trevor Johnson of Blackwood Builders Group in Lynnwood, Wash., was there to learn about a different way of wrapping a house. Blackwood Builders Group builds homes in the $650,000–$900,000 price range and was gearing up to build several spec homes in Bainbridge Island.

After additional conversations, Johnson thought it would be an interesting experiment to build a side-by-side house comparison, using StoGuard on one house, and next door, using a sheet house wrap.

“Sheet wrap is a go-to product out there, and we were excited to do this comparison,” says Crates. “Sheet wrap is not waterproof, and it’s a difficult air barrier to work with.”

Blackwood Builders Group quickly learned that applying the StoGuard system, including StoGuard Fabric and StoEmeraldCoat, was faster than putting up sheet wrap. This was the first time that Johnson and his team ever applied a spray-on air and moisture barrier. According to Crates, Johnson is extremely fast and began the effort with an electric sprayer and switched to a gas sprayer to speed up the application even more.

This comparison was Johnson’s introduction to StoGuard, and he had a better outcome using the fluid-applied system because the savings on labor was more advantageous than the minor difference in the cost of the materials.


Keywords: Energy | Blackwood Builders Group | Education | Energy | Energy Efficiency | Green Builder Media | House Wrap | StoGuard | Sto Residential | Utilities | air barrier