Most new types of wood gliding windows come with weather stripping built in between the frame and the sash. Older types, however, may need sealing. If both sashes move, treat the windows as if it were a double-hung window tuned on its side.
For windows with one gliding sash, treat only the movable part. Install a strip of spring metal in the side channel that receives the movable sash, lining up the nailing flange along the inside edge. Then nail vinyl or rubber gasket along the exterior top bottom and outer edges of the gliding sash. The outer strip will fit snugly against the rail of the inside sash where the window sections meet.
Most metal gliding windows have rubber weather stripping in the tracks of each sash but, like wood gliders, should be sealed where the sashes meet. Attach the gasket with vinyl-to-metal adhesive.
For windows with one gliding sash, treat only the movable part. Install a strip of spring metal in the side channel that receives the movable sash, lining up the nailing flange along the inside edge. Then nail vinyl or rubber gasket along the exterior top bottom and outer edges of the gliding sash. The outer strip will fit snugly against the rail of the inside sash where the window sections meet.
Most metal gliding windows have rubber weather stripping in the tracks of each sash but, like wood gliders, should be sealed where the sashes meet. Attach the gasket with vinyl-to-metal adhesive.