Joining two pieces of wood at a 45 degree angle is made possible using one of the 6 joinery techniques.
45 degree angle wood trim.
Place your quarter round into a miter box and secure it with the pins provided.
Cut with the blade on the right 45 degree angle.
Do same for left side but swing the blade over to the left for an inside out cut.
Measure the wall from corner to corner where the trim is installed with a measuring tape.
Then position the trim to the right of the saw.
Wood is naturally made of fibers that run side by side.
Measure up the right side of the door to the bottom of the 45 degree angle cut on the top trim.
How to cut 45 degree angle cuts on wood trim.
Transfer this measurement to the trim and mark the cut line with a carpenter s square and pencil.
Use a miter box and saw to make a 45 degree cut.
The pencil marking you made should form the corner of your 45 degree angle.
Doing this is similar to cutting an outside corner.
Use a speed square to line up the blade for the perfect 45 degree cut.
Adjust your miter saw to make a 45 degree.
While gluing up would allow the sides of the wood fibers next to each other usually results in a strong glue joint gluing the ends of the wood fibers will be a weakly joint.
Cut the 45 degree angle on both sides from the short to short direction.
Cut your wood at a 45 degree angle angled away from the door jamb.
Cut a 45 degree angle in a piece of trim with a miter saw.