Fastening corners of picture frames can be challenging. There are a number ways to accomplish this task and some are better than others. When you are manufacturing picture frames it becomes more and more important that the corners of the frame be held fast as the frames get bigger and bigger. It becomes even more important when glass is used in the picture frame.
There are many options for fastening corners. The first and easiest (note I did not say 'best”) is to use some kind of a mechanical fastener like nails, staples, steel straps, headless pins or screws. Each one of these mechanical connectors has it own problems. Small finishing nails that are driven in with a hammer tend to loosen joints. Screws need to be pre-drilled and look ugly, staples also have to be hammered and using an air nailer and 18 or 23 gauge pins may not be sufficient for larger frames.
The best way to fasten the sides of a picture frame is to glue “splines” into the corners. Yes, it is more more, but the splines look more professional and are unquestionably the best option. They hold the corners firm, they are permanent and they add a nice detail to the frames. To see how to make splines in the corners of your frames … read on.
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