How to Make Recessed Lights Airtight

Cut the opening for each recessed light fixture using the manufacturer's template. The template will make it less difficult to transfer the exact hole dimensions required to the ceiling or wall and reduce the possibility of creating a hole that is too big. When holes are cut too big, they extend past the trim pieces and thereby reduce the airtight seal. Use a drywall saw to cut the hole.

Position the lighting in place. Mark the screw holes for its bracket, and then pre-drill holes through the marks. Twist drywall anchors into the holes, then secure the lighting in place with screws until the bracket is flush with the wall. Drywall anchors will support the weight of the light and anchor it tightly to the drywall to prevent the light and screws from becoming loose. Follow the same procedures when installing the trim pieces to ensure they are tightly secured to the drywall.

Fasten the trim pieces that surround the lighting to the ceiling or wall tightly with the included screws. Make sure the pieces fit snugly around the light and that the screws are driven as far as they will go into the drywall anchors to lessen the room between the trim pieces and ceiling or wall.