# Attic Air Sealing | Tay River Builders

> Spray foam and foam board to seal an attic, then a thick layer of cellulose over the top.

Source: https://tayriverbuilders.com/work/attic-air-sealing/

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Energy Upgrades

# Attic Air Sealing

Location

Princeton area, NJ

Scope

Air sealing, Cellulose, Blower door

Spray foam and foam board to seal an attic, then a thick layer of cellulose over the top.

Here we used spray foam and foam board to air seal an attic. Sealing the gaps that leak conditioned air into the attic, which is essentially outdoors, can drastically reduce a house’s overall air leakage.

Sealing is the necessary first step before re-insulating, because insulation does nothing to stop air leakage, and it works far worse when air moves through it. Once the sealing is done, we blow a thick layer of cellulose over the attic floor to meet the most stringent energy targets.

In deep energy upgrades we often cut air leakage by 50% and triple the insulation value.

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## Is your house like this one?

Tell us what bothers you about your house. We can measure what it’s doing and tell you what we’d fix first.

[Request a visit](https://tayriverbuilders.com/contact?topic=energy) [(609) 279-0722](tel:+16092790722)