How to Replace a Window Screen

Step 1: Remove the screen from the window
Slide or pop the screen out of the window frame. Most screens lift up slightly and then tilt outward. Set it on a flat work surface where you have room to maneuver.

Step 2: Pull out the old spline
Find one corner of the rubber spline that runs around the perimeter of the screen frame. Use a flat-head screwdriver or putty knife to lift the end, then pull the spline out of the channel all the way around. The old mesh will come free once the spline is removed.

Step 3: Clean the frame channel
Wipe out the spline channel with a damp cloth to remove dirt, old rubber residue, and debris. A clean channel helps the new spline seat evenly and hold the mesh securely.

Step 4: Cut new mesh to size
Unroll your replacement screen mesh and lay it over the frame. Cut it about one inch larger than the frame on all sides - you want overlap so the mesh can be pulled taut as you install it. Use scissors or a utility knife and a straight edge.

Step 5: Roll in the new spline
Lay the mesh over the frame so it overlaps evenly on all sides. Starting at one corner, press the spline and mesh into the channel using the convex (rounded) wheel of your spline roller. Work along one full side before moving to the adjacent side, pulling the mesh gently taut as you go. Avoid pressing so hard that the frame bends. Work around all four sides, keeping consistent tension.

Step 6: Trim the excess mesh
Once the spline is fully seated around the entire frame, use a utility knife to carefully trim the excess mesh flush with the outer edge of the spline channel. A sharp blade gives a clean cut without fraying the mesh.

Step 7: Reinstall the screen
Check that the mesh is tight and the spline is fully recessed in the channel with no gaps. Slide the screen back into the window frame the same way it came out. Test that it sits flush and does not rattle or bow.

• Work on a stable, flat surface - trying to do this job on the ground or on an uneven surface leads to a crooked result
• Keep the utility knife blade pointed away from your hands when trimming
• If the window is on an upper floor, bring the screen inside to work on it rather than attempting the job while leaning out of the window
• Wear gloves if you are working with aluminum mesh, as the cut edges can be sharp
• Do not force a warped or bent frame back into a window opening - this can stress the window sash or frame