I am installing my first ever hardwood floor. It's pre-finished 3/4" solid wood, and it's been pretty fun. I've noticed that some of my end joints have some very tiny gaps on one side of the joint (flush on the other side). I often have to look closely to notice, but some are visible from standing up.
My assumption is that these small gaps result when the board next to the end joint has a very slight bow to it (either concave or convex relative to the boards that comprise the end joint). I suppose it's also possible that the boards were not cut at the factory with perfectly square ends, but enough of my joints do meet perfectly that I don't think this is the case.
My question is: is there anything I can realistically do about this? It's not really a big problem and maybe the answer is just to live with it, but it's slightly irksome to the perfectionist in me. How do I ensure as I lay each row that it doesn't have any slight curve and, therefore, will not pass along any problems to the next row? Are there any tricks to this?
If I could perfectly straighten the bowed boards, it would presumably solve the problem, but frankly, I usually can't even tell if a given board is indeed bowed or not. Certainly not by eye, and not with a 4' straightedge for the shorter pieces. Some of the longer pieces appear to have a very slight bow relative to my 4' level. And even if I did know a board was slightly bowed before I installed it into the floor, I'm not sure how to install it perfectly enough that such slight discrepancies are avoided...?
Here is a photo of the floor - it was put down from right to left (tongues facing left of photo).