While it is cost effective to replace the mesh and spline on an existing screen frame, if your window screens are old, worn down, or made with rolled bar aluminum that is prone to bending and dents, in the long run, it is worth it to make new screens altogether. For example, if you take out your window screens every so often for cleaning, some screen frames, such as those made with rolled bars, will quickly bend out of shape and the mesh will tear sooner. Our window screens are made to last.