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How to Replace a Window Screen: A Step-by-Step Guide

Replacing a torn or sagging window screen is a straightforward weekend fix once you have the right roller tool β€” here's the process from start to finish.

  1. Remove the screen frame

    Lift the screen frame out of the window opening and set it down on a flat surface where you'll have room to work.

  2. Remove the old spline and mesh

    Pry the old spline β€” the rubber-like cord pressed into the groove around the frame β€” out with a screwdriver or your fingers, then pull out the old screen mesh along with it.

  3. Lay the new mesh over the frame

    Lay the new screen material loosely over the frame with some overhang on all sides, then pull it gently taut from one corner, lining it up with the spline groove so it sits smooth and wrinkle-free.

  4. Roll the new spline into the groove

    With the mesh in place, lay the spline over it along the groove and use a spline roller to press it steadily down into the channel. Working one side at a time while keeping tension on the opposite side is the key to a clean, taut result.

  5. Trim off the excess mesh

    Once the spline is fully seated, use a utility knife to trim away the overhanging screen material right along the outer edge of the spline groove.

  6. Reinstall the frame and check the tension

    Fit the screen frame back into the window opening and press on the mesh to confirm it's taut and doesn't sag or ripple.

Tension while rolling is what makes or breaks the result

The single biggest difference between a saggy, amateur-looking screen and a taut, professional one is how much tension you hold on the mesh while rolling in the spline β€” pulling gently but firmly from the opposite side as you work each edge keeps wrinkles from forming.

A spline roller is worth buying for this one job

It's a small, inexpensive tool with a groove on each end for pressing spline into a channel, and while it's technically possible to improvise with a flathead screwdriver, a proper roller makes the whole job faster and far less likely to tear the new mesh.

Frequently Asked Questions

What size spline do I need to buy?

Spline comes in a few standard diameters, and matching the original spline's thickness is important β€” too thin won't hold the mesh tightly, and too thick may not fit the groove. Bringing a short piece of the old spline to the hardware store is the easiest way to get a correct match.

My new screen looks wrinkled after installing it β€” what went wrong?

Wrinkles almost always mean the mesh wasn't pulled taut enough before or during the spline-rolling step. It's usually easiest to pull the spline back out on the affected side, re-tension the mesh, and roll the spline in again rather than trying to smooth out wrinkles afterward.