Prepping Soffits For Spray Foam In Attic

Verify that all attic floor penetrations can be adequately sealed with spray foam insulation.

Prepping soffits for spray foam in attic.

Remove any existing insulation debris and dust and prepare the attic floor for spray foam insulation. This is most often done with spray polyurethane foam spf insulation either open cell or closed cell. Closed cell spray foam has a perm rating of approximately 1 5 to 3 0 per 25 mm 1 in and an r value of approximately 1 05 per 25 mm 6 0 per 1 in. Don t let your attic suck power attic ventilators are a.

It s how we protect the job site from overspray. Provide additional air sealing measures such as sealants or rigid foam blocking of large holes as needed. When you contract with kc spray foam for your spray on insulation needs this step is included in our price quote. And you avoid wood rot and mold.

They also need to seal off areas of air leakage to the outdoors. So are other gaps and cracks that let in outdoor air. Normally in occupied areas all spray foam must be covered by a 15 minute thermal barrier such as thick drywall per code requirements in irc section 316 4 and ibc section 2603 4. But how well does this process of encapsulating the attic actually work.

An attic that s brought inside the building enclosure is a beautiful thing. Since ccspf is a vapour retarder some believe it cannot be used in warm humid climates as it prevents water vapour from going in and out of the assembly. Sealed attics should not have any type of attic ventilation connecting it to the outside. Intumescent coatings are not always needed to coat spray foam in the attic in order to meet code thermal barrier requirements.

The eaves don t get blocked. The prep work ahead of a sprayed insulation job is an important step. Well as any good building scientist will tell you that depends. Hot air doesn t get formed.

Gable vents and soffits are the big culprits here. It s also how we ensure we leave the site better than when we started a job. In a proper spray foam job a contractor doesn t just spray foam all over the top of your attic and go home. Install ventilation baffles essentially plastic or foam vents into the eaves by pulling the existing insulation away from the roof positioning the new vent chute so the bottom extends six inches into the overhang and stapling it into place.

Otherwise humidity will quickly creep into your attic.