![HVAC ducts can be encapsulated in 3 inches of closed-cell spray foam, then buried in R-49 of blown fiberglass insulation after the ceiling drywall is installed in the vented attic. | Building HVAC ducts can be encapsulated in 3 inches of closed-cell spray foam, then buried in R-49 of blown fiberglass insulation after the ceiling drywall is installed in the vented attic. | Building](https://basc.pnnl.gov/sites/default/files/images/2018-Sareth-HM-9-CCSFDucts.jpg)
HVAC ducts can be encapsulated in 3 inches of closed-cell spray foam, then buried in R-49 of blown fiberglass insulation after the ceiling drywall is installed in the vented attic. | Building
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Are You Wondering if Sealing & Insulating your Air Ducts with Spray Foam Insulation is Worth The Cost? - Bird Family Insulation
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