Backer Rod Around Windows

Commonly you use a backer rod to help bridge a gap that is 1 4 to 1 2 inches or more wide.

Backer rod around windows. Fill the rough opening around windows and exterior doors with caulk canned spray foam or foam backer rod. Use in pavement cracks wall joints and foundations. Before caulking use the md building products 1 2 in. In all these applications it is used for three major purposes.

It will not air seal. If spray foam use a low expansion foam designated for doors and windows. While caulk alone can be applied to narrow cracks gaps wider than 1 4 should be filled with foam backer rod first. Many sizes diameters are available for optimal fitting to the size of the joint being sealed.

A backer rod is a cylindrical type of foam used to fill cracks and gaps between building materials. Watch our syndicated tv show today s h. A backer rod fills a wide gap between surfaces to allow you to more easily fill the gap with caulk. The backer rod helps cushion and insulate and helps prevent 3 point bonding.

Fills gaps and openings in pavement cracks wall joints foundations sidewalks and. It is used in a wide range of applications including tiling flooring window paneling and stoneware among others. There are two standard types of backer rods that are available to use depending upon the installation site. Backer rods are usually round flexible lengths of foam that are used as a backing in joints or cracks to help control the amount of sealant caulking used and create a back stop.

Caulk backer rod to help fill gaps and openings in pavement cracks wall joints foundations sidewalks and driveways. Do not rely on fibrous insulation alone to block airflow.