I'm building a box mantle and originally had boards that were supposed to be 72 inches long. After making a few adjustments, I've noticed I've lost about half an inch of length when correcting them to match. What are some strategies I can use to avoid losing any more length on my 45-degree cuts?
3 Answers
Definitely use a stop block for your cuts! This way, you won't have to correct them later, which can eat up those precious inches. Also, starting with longer stock is a smart move. That gives you a buffer for any mistakes or adjustments you need to make!
One trick I like is to use a router with a 45° chamfer bit and tape a straight edge on the side I'm cutting. This way, I get precision without losing length. Also, consider cutting slightly larger than needed at first, then gradually make your adjustments to reach the final size you want.
Sounds like your saw's kerf might be at play here! The kerf is the width of the cut made by the saw blade, so you want to make sure your cut lines stay intact. Mark very carefully so that your cutting line barely remains on the board after the cut. This will help you keep the length you need.

I did start with 8 feet, so that helps! Just need to be more careful with the cuts.