💡 In Episode 13, Rob Hewski, owner of Northeast AeroBarrier, gave us a complete training on how to do proper air sealing and the tips on achieving an ACH (air changes per hour) score of 3.

Key Tips: 

📝 Tip #1: Air Sealing Sill Plates to Foundations ⁣
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📝 Tip #2: Closing up outside cantelivers and overhangs with an air barrier or blocking⁣

Important to note❗️⁣ 
As of April 1st this year, it is mandatory for all builders of new constructions, renovations and retrofits to follow 2018 IEEC energy code standards. ⁣

In short, what does this mean? 
A mandatory blower door test is to be performed. The infiltration level required is below 5 air changes an hour. ⁣

⁣What does ACH mean? 
The ACH is the air changes per hour.

💨 Pressurize the building to 50 pascals with the blower door fan. Reference the pressure on the outside vs the pressure on the inside of the building. ⁣

The leakage number for the building  is determined by the extra air the fan needs to inject into it to maintain the goal of 50 pascals.⁣
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🏢 📏Take the entire volume of air in the building and compare it against the amount of air that is needed to maintain pressure in the building. ⁣
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❗️That number gives the CFM leakage (cubic feet per minute) that is required to maintain the 50 pascal level.⁣
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At GRIT, we go above and beyond to guarantee good air sealing and quality in all of our buildings. ⁣
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This is why we do a pre-blower door test. Then, we perform another test after spray foaming and insulation, and a final test right before certificate of occupancy. ⁣
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Special thank you to @northeast_aerobarrier 🙌🏻⁣
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🧱 If it’s GRIT built, it is a building you can depend on because GRIT cares. ⁣

For more, please watch: Proper Air Sealing Ft. The Abigail Nine