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 Backer Rod is a foam material used
to fill large checks and gaps between logs. It also provides support for chinking
and sealants. Its primary purpose is act as a "bond-breaker" and promote
two-point adhesion (see diagram), giving the joint and sealing material the ability
to compress and expand as logs move. Sealants and chinking do not adhere to the
backer rod - only to the log surfaces of the joint - allowing for movement without
damaging the sealing material.
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Grip Strip
The Choice of Professionals.
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Half Rod
The "Rounded" Flat Rod.
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Sashco distributes a number of types and profiles of backer rod including the Grip
Strip™ and Half Rod. You should select backer rod based upon your particular
needs. Open-cell type is recommended to speed drying. A closed-cell type is more
moisture resistant. (Ask your applicator or contact Sashco for a handy comparison
sheet.)
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