I have an ongoing struggle with old floor boards that I am sure many readers also share. The problem in many of these old Cincinnati buildings is that the floor boards are a soft wood like pine or fir, maybe poplar, and they dent easily and sometimes they splinter. But the really annoying thing about them is the gaps between some of the boards.
I have noticed several ways these gaps have been repaired around the neighborhood. Some people use Bondo. This seems to work, but the Bondo is harder than the wood, and it certainly does not stain. Another method is to use a product called "part 50". This is a clear epoxy wherein you mix equal parts and pour it into the holes and it solidifies so that it looks like glass. They sell the stuff at Cincinnati Color. This is pretty cool, but can be very expensive and is really only appropriate for small dents and depressions.
Years ago, I experimented with wood epoxies like Abatron. These worked pretty well when repairing window sash, but again, it was pretty expensive not to mention time-consuming. I found out later that if the wood was that rotten, it was better to just get some new sash made to match. And that is an approach that some people take with the wood floors: cover them with new wood. However, I prefer to keep the old wood floors whenever possible. A new floor just doesn't have the character IMO.
Lately, I have been experimenting with Gorilla Glue. Gorilla glue is the duct tape of the modern handy man. To my wife's delight, I use it to fix everything from kid's shoes to broken dolls. The cool thing about Gorilla glue is that it expands into the recesses of the cracks and bonds very strongly to the wood, and seems to have the same flexibility of the wood. It also sands easily. The big negative is that when it expands, it leaves lots of air bubbles, which are not so good when trying to refinish a smooth floor. Below are some photos I took this week, while trying to repair a crack. I think the Gorilla Glue is great at solidifying the old loose boards, but I need something that is better for the final finish coat. Anyone have ideas?
staining the fill
wiping excess stain off
Walk on Woodburn
14 minutes ago