Replacement splines can be purchased at most hardware or home repair stores.
If you do not need to completely replace your window screen, skip this step. Aluminum mesh is popular because it is sturdier than other screen meshes. [8] X Research source
If you do not need to replace the mesh screen, keep your screen in its frame and continue to the next step. Mesh material will usually curve to one side. Place the mesh in with the curved side down so it is easier to work with.
If your window screen still seems loose, repeat the process again with a lighter or smaller object.
For larger holes or tears, you may not be able to darn it. In this case, you may need to patch the hole.
Choose a needle with a large eye that can accommodate the screen strand. If you have sewn the hole or tear and it is still noticeable, cover it with a patch.
If the damage takes up more than a quarter of the window screen, you may need to replace the entire screen. Leave at least 1⁄2–1 inch (1. 3–2. 5 cm) of screen material between the hole and the window frame. The closer a hole is to a frame, the harder it is to repair.
Some patches have an adhesive backing while others do not. If yours does not, secure the patch with a clear, waterproof silicone glue.
