I have an 8 foot manual screen which as you probably know has a few slight folds in it when its down. Ive seen a few posts talking about screen tensioners. What are these tensioners and will they give my screen a nice flat surface?
A tab tensioned system is the way most screens are done commercially -- but there isn't really an easy way to retrofit this to an existing screen. Essentially what tab tensioned gives you is:
a) A really heavy bar at the bottom of your screen
b) little "tabs" along each side of the screen in a slight curve (wide at the top, narrow in the middle, wide at the bottom.
c) through the tabs is a wire that pulls the tabs tight. The heavy weighted bar at the bottom make certain the wire it tight and pulling the screen to either side.