Through a visual inspection of the building envelope and ongoing blower door testing, BIG staff provided specific ‘good-better-best’ strategies for Greiner to achieve 15%-30% air sealing targets. We also discussed specific applications of air sealing materials and the need for installing mechanical ventilation when the air changes at natural per hour are .35 or less. Underlying each part of the air sealing training was a cost-benefit proposition for Greiner’s staff in order to maximize their resources at a job.
Ongoing blower door testing. After every significant air sealing treatment, we retested to check our impact on the shell leakage.
- 1st treatment: Caulking over gasket at sunlight (2284 CFM50, 1% reduction)
- 2nd treatment: Weatherstripping mechanical room door and attic access (2219 CFM50, 4% reduction)
- 3rd treatment: Sealing can lights, switch plates, doorbell transformer, and weatherstripping doors to exterior and garage (2198 CFM50, 5% reduction)
- 4th treatment: Sealing abandoned vent underneath stove top, penetration at back splash/cabinets (2080 CFM50, 10% reduction)
- 5th treatment: Reinforced skylight with duct sealing mastic (pookie) (1900 CFM50, 17.6% reduction, i.e. “FQC safe”)
Result: A 15% air sealing reduction target was achieved before lunch. (Expected to take 6 hours; it took 4. Achievable with a crew of 2 persons, i.e. 8 hours of labor total.)
#NiceWork Greiner team!