Dear Jim: I need to upgrade my old wood windows, but I like how the frames look. The windows won't stay open and the single-pane glass is not efficient. How can I switch to double-pane glass and ...

Harwood has Lexan in two different thicknesses. The windshield is usually 3/16 inch thick[bottom]for durability, and the rest of the windows are typically ⅛ inch for less weight.(Photography: Rob ...