How to Fix a Window Screen: Replace Mesh and Repair Bent Frames (2026)

Frequently Asked Questions

What type of screen mesh should I buy for replacement?

Fiberglass mesh (the standard gray screen) is best for DIY repairs — it doesn't crease as easily as aluminum mesh and is more forgiving when installing with a spline roller. 18x16 mesh (18 strands per inch horizontal, 16 vertical) is the standard for most windows. For pet-resistant screening: heavier 'pet screen' with thicker strands is available and significantly more puncture-resistant. For solar screening or privacy: solar mesh is available in various shades and reduces heat gain.

What size spline do I need?

The spline is the rubber gasket that holds the mesh in the frame groove. Spline comes in diameters from 0.140 to 0.230 inches. Measure the groove width on your frame — it should be slightly smaller than the spline diameter so the spline fits snugly. The most common size for standard aluminum frames is 0.160 to 0.175 inch round spline. If the old spline is pliable and unbroken, you can reuse it. If it's cracked, hard, or disintegrating: replace it.

How do I fix a bent aluminum screen frame?

Aluminum screen frames are made of hollow extrusion held together by plastic corner inserts. To straighten: if it's a mild bend in the middle of a rail, you can often flex it back by hand. If a corner is sprung: pull the two rail ends apart from the corner insert, reposition, and press back together. For severe bends: it's usually cheaper to replace the full frame. Pre-made replacement frames are available cut-to-size at hardware stores, or in kit form you cut yourself.

My screen frames fall out of the window. How do I fix that?

Most window screens are held in by spring-loaded tabs on the frame sides, or by vinyl spline that expands to grip the window frame channel. If spring tabs are broken: replacement spring tabs are available at hardware stores for $1–$3 each. If the frame itself is too small (the frame shrank or was replaced with the wrong size): add foam weatherstripping to the edges of the frame so it fits snugly in the channel.

Can I repair a small hole in screen mesh without replacing the whole screen?

For holes under 1/4 inch: seal with a dab of clear nail polish or clear silicone sealant — it dries invisible and stops the hole from growing. For holes 1/4 to 1 inch: use a [screen repair patch](https://www.amazon.com/s?k=window+screen+repair+patch+self+adhesive&tag=fixupfirst-20) — self-adhesive mesh patches that cover the hole. For holes over 1 inch: rescreening the whole frame is faster and looks better than patching.

Replacing the screen mesh in an aluminum frame takes about 15 minutes. Remove the old spline (the rubber cord holding the mesh in the groove), pull out the old mesh, cut new mesh 1 inch larger than the frame on all sides, lay it over the frame, and roll new spline into the groove using a spline roller.

Rescreening a window takes 15 minutes and lasts 5–10 years. Here’s how to do it.

What you need

• Screen mesh roll — fiberglass, 36-inch or 48-inch width depending on your window height
• Replacement spline — measure your existing spline diameter
• Spline roller tool ($3–$8)
• Utility knife or scissors
• Flat-head screwdriver
• Tape measure

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Step 1: Remove the screen from the window

Most aluminum window screens pull out of the window from inside. Push in the spring tabs on both sides to release the frame.

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Step 2: Remove old spline

Use a flathead screwdriver to pry up one corner of the spline in the groove. Once it’s started, pull the spline out of the groove by hand — work around all four sides.

Remove the old mesh. Inspect the frame groove — if the groove is damaged or clogged, clean it with a screwdriver before proceeding.

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Step 3: Cut new mesh

Roll out mesh over the frame with 1 inch of overhang on all four sides. Cut to size with scissors or a utility knife.

Tip: Use masking tape to temporarily hold the mesh to the frame while you work — it prevents the mesh from shifting.

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Step 4: Install spline — start with one short side

Place one end of the new spline at a corner of the short side. Using the spline roller, roll the spline into the groove — the concave wheel of the roller pushes the spline and mesh together into the groove.

Key: Keep consistent pressure as you roll — don’t let the mesh bunch or wrinkle. Roll to the opposite corner, press the spline into the corner, and move to the next side.

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Step 5: Install remaining sides

Work in order: short side → long side → short side → long side. On each side, gently pull the mesh taut (but not so tight it deforms the frame) before pressing in the spline.

Corners: cut the spline at each corner — don’t try to bend continuous spline around a corner; it creates a bump that won’t seat flat.

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Step 6: Trim excess mesh

Once all four sides are done, run a utility knife along the outer edge of the spline groove to trim off the excess mesh. Cut at a slight inward angle so the blade rides against the groove wall — this gives a clean cut without cutting the spline.

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Step 7: Check and reinstall

Inspect the mesh — it should be flat, wrinkle-free, and uniformly tight. Reinstall the screen in the window.

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Related guides

• How to Seal Drafty Windows — if the frame isn’t sealing well
• How to Replace a Window — when the full window needs replacement
• Annual Home Maintenance Schedule — screen inspection in spring prep