We have built 4×4 retaining walls around existing rocks and concrete that we were unable to get rid of. The idea was – and is – use something fill the gaps between the lumber and the rocks / cements. Given that some of the gaps are over 2 inches, what is the best – and easiest – way to fill these gaps?
Best Answer
I have seen fine wood dust mixed with a putty of some kind mixed and placed inside gaps, if the wood is stained then also add a little stain to match the color.
Sanding down to the exact shape would have been the first step for me then doing the filling.