Most greenhouse film lasts between two and five years. Thickness is the starting point, but the UV stabilization package matters just as much: a 150 micron film with a weak UV package can fail sooner than a 120 micron film with a strong one.
Local climate changes the result. Intense sun, high altitude and strong wind accelerate aging. Contact with a hot metal frame, and certain sulphur or chlorine based chemicals, also shortens service life.
Replace the film when light transmission drops noticeably, the surface turns brittle, or tears spread along the fixing points. Many growers in hot regions plan on a three year cycle, while milder climates reach four to five years.
To extend service life, choose a UV stabilized grade matched to your region, avoid over tensioning during installation, and insulate the film where it touches the frame. Send us your climate and target service life and we will recommend a specification.