Window Screen and Hardware

Phifer screen cloth and spline: fiberglass insect screen in charcoal and gray, aluminum insect screen, polyester pet screen, and screen spline in 0.125, 0.140 and 0.160 in. Spline diameter is the spec people get wrong — it has to match the frame groove and the screen thickness together, and if the old spline came out easily it was probably already too small. Fiberglass is forgiving, easy to roll and the standard choice; aluminum holds its shape and will not sag on a large screen but creases permanently if you mishandle it. Pet screen is a heavier polyester weave that resists claws at the cost of some visibility. Buy cloth a few inches over the frame in both directions so you have something to pull against.