screen repair shop

by Tom Haight
(Sioux Falls, SD)

What is the best way to prevent "hour glassing"? especially on mobile-home window frames I use round ribbed rubber spline(hollow) and foam spline but can't

seem to get everything properly tight enough & still prevent it. I use rails with sliding frame holders on
a 4x 8 table. use three kolders on all sides. one each corner & one in the middle. I've pre-bowed all the rails outward to try to get "pull-back" to normal.

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