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.
Different mesh products have different handling and fixing requirements. Share the proposed product and the screen dimensions before ordering. This is ordinary insect-screen work; stronger-sounding product labels do not turn an ordinary frame into a certified security or protective screen.
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.
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.