Re: Filling gaps between boards on a rustic pine floor
There is nothing more worse than caulk shrinkage during the cold season! Seinfeld did a documentary on this same issue back in the 90's!
Does you customer want their floor to look like perfectly machined hardwood flooring? They will NEVER get that with an old, wide pine floor. I have 2 x 8 pine flooring in my house and it expands and contracts at least 1/8" seasonly - leaving gaps up to 1/4". I would never consider filling the gaps with caulk or epoxy for two reasons - I think its a short term solution and I think it ruins the look of an old floor.
The hemp rope solution is what has been done for hundreds of years. I didn't do it in mine, but may do it down the road. For now, I tolerate the gaps, and vaccuum them when needed.
I believe it was Confuscious that wrote: Good stiff rope fills cracks better than shrinking caulk!
"Time is a great teacher, but unfortunately it kills all its pupils."