Dennis Weaver 2007-5-18 2006-5-20 Tri-Rod is a closed cell polyethylene foam backer-rod designed for 'chink-style' round log homes. The triangular shape fits snugly in the joint between logs and provides an optimum shap backing for chink-style joints. Has R-4 per inch rating. This is the place to order directly from Weatherall and our authorized distributors. 458763 text/html 1.0 EN index,follow Weatherall backer rod trap rod trapazoid rod tri rod tri-rod backer rod weatherall tri-rod backer rod white backer rod closed cell foam closed cell backer rod closed cell foam backer rod closed cell foam backer rod chinking chinking for log homes log chinking log home chinking log cabin chinking chink Log Builder 1010 chinking 1010 Tri-Rod Backer Rod text