Traditional Joinery

Window sash are made of wood having relatively small cross-sections yet sash are called upon to stand up to severe service requirements.  For this reason the complicated joinery was developed to meet these requirements.  Sash having traditional mortise-and-tenon joinery are made to the best design possible. 

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Mortise-and-Tenon Sash Joint Detail   Traditional Joinery
Mortise-and-Tenon Sash Joint Detail

Detail of Relished Mortise-and-Tenon Joinery