To Make Thin Wooden Storm Windows, Use Dowels to Join Corners


Around these parts, storm windows are typically 1 1/8″ thick.  In these circumstances, double biscuits can be used as simple joinery.  But sometimes we see thinner storm windows – ones that are only 3/4″ thick.  Under this scenario, the wood isn’t really thick enough to install a double biscuit, and a single biscuit may not provide enough strength.  So, alternative joinery may be in order.  For a simple solution, drill a 3/8″ hole through the stile and into the rail and glue in corresponding dowels.  Two dowels can be used for the upper and lower rails but you’ll likely be limited to a single dowel for the center mullion.  Blind dowels can also be used.


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