There are many ways to make or fix 90 degree corners on trim work (some I will post later most likely in a video). I will focus on just a couple of things for casing and picture frame trim. Picture frame trim is usually easy to make perfect corners, that is if you have a chop saw specifically made for trim. If you do not have this kind of equipment it can be a very difficult task to make a corner look nice. Cuts made from a basic miter box can very just enough to make for very irritating corner matching. There are two tools to that come in very handy when working with door/window casing and picture frames.

- First is the Japanese pull saw. This saw is a very flexible, sharp saw that cuts on the pull instead of the push (traditional hand saw). It is very useful in trim carpentry and is not limited to fixing casting. To use this saw to fix casting, mount the trim you would like to fix (cut is a little off, either the top or the bottom of the casting is touching, and the joint is not tight) to the door jamb with two nails in each piece, just enough to hold the trim in place. Carefully pull the saw through the trim joint to remove the excess wood stopping the joint from pulling tight. If the joint can be pushed together, and is tight, go ahead and finish nailing the trim to the jamb. One piece of the trim may need to be remounted depending on the amount you removed with the saw. Use a 4d finish nail to hold the thick part of the trim together (nail it from the top if possible, this way you cannot see it).

- The second tool that can help you with this sort of trim is a corner clamp (sometimes called a pony clamp because that company makes them). This is an easy tool to use, and works in combination with the pull saw. Just clamp the two pieces of trim into clamp the way that they would be attached to the door or on the picture frame. If the joint is good, do not do anything unless you are making a picture frame, in this case go ahead and nail and glue the trim. If the joint is bad, take the pull saw and cut along the joint removing the excess blocking the joint from coming together tightly. Remove the trim and either re-clamp for picture framing or attach to the door/window jamb.

I hope this information helps you, Thank you for reading.

Luke

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