2 Track, 2.5 Track and 3 Track Sliding Windows

A 2 track window has two glass panels. A 2.5 track adds a slim track for a mosquito mesh. A 3 track has a full third track, for a mesh or an extra glass panel.

What the tracks mean

• 2 track: two sliding glass panels. Simple and economical.
• 2.5 track: two glass panels plus a half-width track for a sliding mosquito mesh.
• 3 track: three full tracks, for three glass panels or two glass and one mesh, so more of the opening can be open.

Which to choose

• Bedrooms: 2.5 track with mesh, to keep mosquitoes out with the window open.
• Halls and wide openings: 3 track, so a larger part opens.
• Store rooms or rarely opened windows: 2 track.