MYTH 2: Chinking can only be applied in weather that is 40 degrees or warmer. Some manufacturers offer tinting products that can give you even more creative color options. But most chinking manufacturers offer several color options, including traditional hues that stand out from the logs and modern hues designed to match your logs. Some people think chinking always looks like "zebra stripes" - bands of light-colored material between dark logs. MYTH 1: Chinking comes in just one mortar color. If the joint is too shallow for a backing rod, caulk is typically used instead. Backing rods also provide significant joint insulation, reduce the amount of chinking required, and prevent the chinking from getting deep into the joint where it will experience movement beyond its elastic limits. This is known as "two-point adhesion" and allows the chinking to shift with the logs. That means the chinking should adhere only to the logs above and below the chinking joint, in two thin lines. A correctly designed backing rod provides a non-adhering surface. MYTH 3: Chinking does not need a backing rod. On a conservative estimate, chinking lasts about 40-50 years. Today's "elastomeric" chinking materials are more flexible - so as logs shift and settle, they are far less likely to tear or come loose. This was basically true of the older cement-based chinking materials, which had relatively low bond strength and no elasticity. In fact, chinking can boost the R-value (a measure of heat transfer) of a chink joint to almost the R-value at the log's center. When properly applied, chinking drastically improves a home's energy efficiency by reducing heat loss where the logs meet. MYTH 1: Chinking is not necessary - it's just for visual appeal.
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