Backer

Backer rods are flexible foam inserts that create a foundation for chinking and sealants in log homes. They fill gaps between logs, prevent three-sided adhesion, and ensure proper sealant depth for long-lasting weather protection.

Product Profiles

We carry round and trapezoid-shaped backer profiles designed specifically for log joints. Round backer rods work well in uniform gaps, while trapezoid-shaped backer rods conform better to irregular log joints and corners.

Size & Lengths

Round backer rods are available in a wide range of diameters to match various uniform joint widths from narrow gaps to wider log joints. They come in multiple convenient coil lengths to suit different job sizes, with bulk options available for larger installations.

Buying Considerations

Closed-cell foam is used for backer due to its moisture resistance. Size your backer 25-30% larger than the gap for proper compression fit.

Applications

Use backer in horizontal joints between log courses, vertical gaps at corners, and behind chinking and caulking. Backer is also effective for filling checks (cracks) in individual logs behind caulking and for use as sealant in window and door frames.