Measure the existing screen and show how it sits in the opening. Overall dimensions alone may omit clips, recesses or clearance. A customer-supplied replacement should be checked against the fixing arrangement before purchase, especially where the old screen is missing.
Show hinges, rollers or catches as well as the mesh panel. A mesh replacement is different from correcting a damaged door frame or movement problem. Hardware work can be reviewed separately, while security-screen systems and specialist glazing remain excluded.
The retaining spline must suit the frame groove and mesh. Reusing a brittle or incorrectly sized spline can leave an uneven result. Keep any accessible product information and show the groove where visible, without damaging the frame to obtain a sample.
Fit suitable mesh and spline to an accepted sound frame, or install a compatible ordinary supplied screen and check its fit. Scope limits: Ordinary insect mesh and compatible screen frames only. No security screens, fall-protection claims, specialist glazing or inaccessible high-level work.