You can replace a window screen yourself with a flathead screwdriver and a new screen frame

Window screen replacement is a straightforward job that takes about 15 minutes per screen and costs between $10 and $30 in materials. You do not need special tools — a flathead screwdriver, a utility knife, and a spline roller (a plastic wheel tool that costs $3 to $5) are all you need. The hardest part is usually getting the old frame out of the window track, not putting the new one in.

Most residential windows use one of two frame styles: frames that slide into a track on the window sill, or frames held by clips on the sides. This guide covers the sliding-track style, which is the most common. If your frame is held by side clips, you straightforward push the clips inward and lift the frame out — the rest of the process is identical.

Key Takeaways

  • Measure your window opening width and height before you buy a replacement frame, because screens come in standard sizes and a frame that is too large will not fit.
  • The spline — the rubber cord that holds the mesh in place — can be reused if it is still flexible, so you may only need to buy mesh and not a whole new frame.
  • If you choose to reuse the frame and replace only the mesh, you will need a spline roller tool to press the new spline into the groove that holds it.
  • Replacement frames are cheaper than repair kits, and a new frame lasts 10 to 15 years before the mesh tears again.

Remove the old frame from the window track

Slide the window sash (the moving part of the window) down as far as it will go. This exposes the top of the screen frame. Grip the frame at the top corners and pull it straight toward you — it should slide out of the track with steady pressure. If it sticks, run a flathead screwdriver along the inside edge of the track to loosen any paint or debris, then try again.

Once the frame is out, set it on a flat surface. Inspect the frame itself — if it is bent, cracked, or warped, you will need to buy a replacement frame. If the frame is straight and solid but the mesh is torn or the spline is cracked and brittle, you can replace just the mesh and spline.

Decide whether to replace the frame or just the mesh

A full replacement frame costs $15 to $30 and comes with mesh and spline already installed. You straightforward measure your window opening, buy the correct size, and slide it into the track. This is the fastest option and requires no tools beyond a screwdriver if the frame is stuck.

Replacing only the mesh and spline costs $5 to $10 and requires a spline roller tool. Remove the old spline by prying it out with a flathead screwdriver — it runs in a groove around the inside edge of the frame. Pull out the old mesh. Lay the new mesh over the frame, cut it roughly to size with a utility knife, then use the spline roller to press the new spline into the groove, which traps the mesh underneath. This method works well if your frame is in good condition but the mesh is torn or the spline has hardened with age.

Measure your window opening before you buy

Measure the width of the window opening from the inside of the left track to the inside of the right track. Measure the height from the sill (the bottom horizontal part) to the top of the opening. Write both measurements down. Screens come in standard sizes — common widths are 24, 28, 32, and 36 inches, and common heights are 24, 36, and 48 inches. If your opening is 25 inches wide and 37 inches tall, you will need a 24-inch-wide frame (it will fit with a small gap) or a 28-inch frame (it will not fit at all).

If your window opening does not match a standard size, you have two options: buy the next size down and accept a small gap at the top or sides, or order a custom frame from a hardware store. Custom frames take one to two weeks and cost $40 to $60, so most people choose the standard size and accept the gap.

Install the new frame or mesh

If you bought a replacement frame, straightforward slide it into the track from the top. Push it down until it sits flat against the sill. The frame should move smoothly and sit flush with the window opening on all sides. If it binds or does not sit flat, remove it and check that you have the correct size.

If you are replacing only the mesh, lay the new mesh over the frame and cut it to rough size with a utility knife — leave about half an inch of mesh hanging over the edge on all sides. Use the spline roller to press the spline into the groove, starting at one corner and working around the frame. The spline roller has a concave wheel on one side and a convex wheel on the other; use the concave side to press the spline into the groove. Once the spline is seated all the way around, use the utility knife to trim the excess mesh flush with the frame edge.

Slide the frame back into the window track

Grip the frame at the top corners and slide it back into the window track. Push it down until it rests on the sill. The frame should sit flush with the window opening and move smoothly when you push and pull it. If it binds, remove it and check that the mesh or spline is not protruding beyond the frame edge.

Open and close the window sash a few times to make sure the screen does not interfere with the window movement. If the sash catches on the screen, the frame may be slightly too large — remove it and try the next size down, or sand the sides of the frame lightly with 120-grit sandpaper to reduce the width by a quarter inch.

Maintain your screen to extend its life

A window screen lasts 10 to 15 years if you keep it clean and do not force it in or out of the track. Rinse the mesh with a garden hose twice a year to remove dust and pollen. If the mesh tears, patch it with a screen patch kit (available at any hardware store for $3 to $5) rather than replacing the whole frame — patches work well for tears smaller than 2 inches. If the tear is larger or the spline has hardened and cracked, replace the mesh and spline as described above.

Do not paint over the frame or mesh, because paint will make the frame stick in the track and will eventually crack and peel. If you need to paint the window trim, mask off the screen frame with painter's tape.

Frequently Asked Questions

Can I use a screen frame that is slightly larger than my window opening?

No. A frame that is too large will not slide into the track smoothly and will bind or jam. Buy the next size down instead — a small gap at the top or side is normal and will not affect how the screen works. If no standard size is small enough, order a custom frame.

What is the spline and why does it crack?

The spline is the rubber cord that runs in a groove around the inside of the frame and holds the mesh in place. It cracks and hardens over time because of sun exposure and temperature changes. Once it cracks, it no longer holds the mesh tight and the mesh will sag or tear. You can replace just the spline without replacing the whole frame.

How do I know if my frame is the sliding-track type or the clip type?

Look at the sides of the frame. If you see a groove or channel running up and down the side of the window, your frame slides into a track. If you see small metal or plastic clips on the sides of the frame, your frame is held by clips. Clip-type frames are removed by pushing the clips inward and lifting the frame out.

Can I patch a torn screen instead of replacing it?

Yes, if the tear is smaller than 2 inches. Buy a screen patch kit at any hardware store — it comes with adhesive mesh that you stick over the tear. Larger tears or tears near the edge of the frame are better fixed by replacing the mesh and spline, because patches can peel off over time.

Do I need to remove the window sash to replace the screen?

No. You only need to slide the sash down to expose the top of the screen frame. You do not need to remove the sash itself. If your window has a sash that does not move, you may need to remove the frame from the side instead of the top — check whether your frame has clips on the sides.