Air seal an attic series.
How to seal light fixtures in attic.
Cut 1 3 boards to fit the perimeter of the opening and nail them on with 6d finish nails.
Clear away any residual insulation at the ceiling area around the light by hand or using the brush.
Seal the attic access weatherstrip the attic access hatch or door.
In condensation in the attic marc rosenbaum suggested that ceiling fans recessed lights and other fixtures be sealed to reduce air leakage into attics.
The gap between a fixture and the drywall can be easily sealed with caulk but leakage through the fixture itself can be substantial.
Apply a generous bead of the spray.
If you have recessed light fixtures in your home you may also have a significant volume of conditioned air escaping into your attic.
In this video mike guertin shows how.
Apply self adhesive foam weatherstrip tape to the top edge of the stop.
Carry the box spray foam and a utility brush to the attic.