Using Backer Rod

During log home restoration when caulking a joint or check 1/4 inch or larger be sure to use backer rod. It not only fills up some of the gap, but more importantly, it keeps the caulk from sticking to the back of the crack or check. By doing this, the caulk only sticks to the top and the bottom therefore allowing for more movement when the logs expand and contract. If the entire check is filled, when the logs move, the caulk has to stretch in all directions rather than just two (top and bottom) thereby creating more stress and premature failure.