Join Date: Sep 2012
Location: Wilkes-Barre, PA
Sash saws are backsaws, typically 14" in length, used for cutting joinery. What distinguishes them from other joinery saws is the tooth geometry.
Sash saws have a style of filing that has become known as a "hybrid" filing. Think of it as halfway between a rip tooth and a crosscut tooth.
They make good tenon saws because they can make the rip cut for tenon cheeks as well as the crosscut for shoulders. If they are not filed properly, or if they have too much set, they won't produce a satisfactory crosscut finish, however.
I have an old Disston sash saw that I use as a kind of joiner's utility saw. If I need to make super clean on-the-money cuts, I reach for a dedicated rip tenon saw or crosscut carcass saw.