Nothing unusual about that.
Foam air flow vents for attic ceiling.
Baffles provide a channel for air to flow through certain parts of the attic.
Earlier this year i got a question about a home that had spray foam insulation in the attic.
It s important you spray foam attic rafters only if you need to.
Attic ceiling to stop airborne moisture from reaching a cold surface and condensing inside the building envelope in this design insulation effectively separates the interior and exterior spaces while slowing down moisture flow so the dewpoint is not achieved within.
The rigid foam is cut to be 2 inches wider than the space between rafters then 1 inch of foam is scored and folded over on either side of the foam creating standoffs that hold the foam away from the roof sheathing providing a space for air to flow.
Typically made from polyvinyl.
The band joist helps prevent windwashing which can reduce attic insulation r values on extremely cold days and can add moisture to the insulation.
If you re not do the attic floor.
If you re using the attic for living space then you need to insulate the rafters.
With spray foam unlike with loose fill or batts you must cover the soffit vents they aren t needed to keep the roof cool.
Use it between rafters to create an air channel through insulation to help keep air flowing freely in your attic.
Attach this roof and attic insulation treatment using foam baffles to ventilate insulate and channel cold and hot air to roof vents before insulation is add.
Rafter baffle soffit vent batt insulation attic ventilation.
Spray polyurethane foam will provide thermal insulation that will minimize air infiltration which can help to save on heating and cooling costs within the indoor environment.
When set into place and sealed with spray foam the vent baffles are insulated and air sealed.
For improved air circulation in the attic install the durovent 22 in.
Then cover the foam with drywall as required for fire safety.
That s how you can save up to 40 on your energy bills.
You re sealing outside air out and keeping air you already heated or cooled inside.
The attic insulation where air entering the soffit vents flows through the attic insulation.
Unvented attic assemblies unvented attics rely on an air impermeable insulation installed to the roof deck s underside i e.
It can be cut to fit most joist spaces and is an affordable way to meet energy code requirements for air flow.
Foam blocks airflow needs no vapor barrier and has a higher r value per inch than loose fill or batts so you ll get more protection with less depth.
Baffles are also called wind baffles venting chutes rafter vents or insulation baffles.
