How to Replace a Window Screen

Replacing a window screen is one of the most satisfying DIY projects — it takes about 20 minutes, costs under $20, and transforms a damaged screen into a like-new one. Here's exactly how to do it.

What You'll Need

• Replacement screen mesh
• Screen spline (rubber cord) — match the diameter to your existing spline
• Spline roller tool
• Utility knife
• Flathead screwdriver
• Scissors

• Window Screen Mesh Fiberglass 48"×102" (Black) — enough mesh for multiple full screen replacements; fiberglass is easy to work with and won't rust
• BAYTORY Screen Spline Roller Tool 3pcs — wooden handle with steel and nylon bearing wheels; the essential tool for pressing spline evenly into the groove

Step 1: Remove the Screen from the Window

Most screens are held in by clips, tabs, or plunger pins at the corners. Release these and lift the screen out. Lay it flat on a clean work surface.

Step 2: Remove the Old Spline

Find a corner of the rubber spline (the round cord pressed into the groove around the frame). Insert a flathead screwdriver under it and pry it up. Pull the spline out all the way around the frame. The old mesh will come free with it.

Step 3: Clean the Groove

Remove any debris from the spline groove. A clean groove ensures the new spline seats properly and holds the mesh securely.

Step 4: Cut the New Mesh

Cut the new mesh about 2" larger than the frame on all four sides. This gives you enough to grip while installing and to trim after.

Step 5: Position the Mesh

Lay the mesh over the frame, centered so there's equal overhang on all sides. Make sure the mesh is straight — align it with the frame edges.

Step 6: Press in the Spline — Start at One Corner

Use the convex (rounded) wheel of the spline roller to press the spline and mesh into the groove simultaneously. Start at one corner and work along one side at a time. Keep the mesh taut as you go — pull gently on the opposite side to prevent wrinkles.

Tip: Use the concave (grooved) wheel to press the spline deeper after the initial pass.

Step 7: Work Around All Four Sides

Complete all four sides. At corners, fold the mesh neatly and press the spline through the fold. The mesh should be taut with no wrinkles or sags.

Step 8: Trim the Excess Mesh

Run a utility knife along the outside edge of the spline groove to trim the excess mesh. Hold the knife at a slight angle so you cut cleanly without cutting the spline.

Step 9: Reinstall the Screen

Snap the screen back into the window and test the fit. The mesh should be taut and the frame should sit flush with no gaps.

Choosing the Right Spline Diameter

Spline comes in diameters from 0.125" to 0.250". Measure your old spline or the groove width to find the right size. When in doubt, go slightly larger — it's easier to press in a slightly oversized spline than to deal with one that's too small and keeps popping out.