Louvre and Blind Slat Profiles from Sure Shade

The blind slat profile of the Sure Shade® Basic 100F is 100mm wide and can only be controlled by ladder braid and has flexibility of movement under wind load or use. This excessive flexibility of the blind slat has a significant drawback as the slat can either rotate around the ladder string or distort and flatten against the glazing in the wind causing excessive instability, movement, noise and block out of light.

All 100F Sure Shade slats are manufactured with lift tape holes that are punched and DRAWN to present a smooth round edge to the lift tape.

Slat rotation is overcome by either a single or double over lock of the ladder cross string across the required number of slat as dictated by the location and wind loading. (caution: see above discussion for limitation of blind ladder string service life)

Lack of slat rigidity also necessitates that the ladder braid be closely placed along the length of the blind slat as the slat flexibility will cause the slat to sag if the ladder braid is spaced too far apart.

The side to side movement control of the blind slat is achieved by a wire guided through the end of each slat, which allows very easy fixing and minimal visual obstruction but, as is common to ALL wire guide installations, cannot provide wind stability and has these major defects;

1. Wind loading will cause the blind wire guide to vibrate, resonate and shake the blind slats causing considerable noise. (similar to rigging on a boat in the wind)

2. Due to the single convex/concave blind slat design light block and sun glare cannot be achieved with wire guide as there will always be approximately 20% light coming through the slats even when the slats are fully closed.

3. Wind will cause the blind to sway sideways and move forward and backwards hitting walls and the glazing when under wind load. In summary the SURE SHADE® Basic 100F L3 W offers high solar heat block out at a very cost effective price where wind loading and light block out is not an issue.