anyone know anything about sun-blocking material?

[robphelan]

we have a pergola with a lattice roof - I want to lay some sun-blocking fabric over the lattice to diffuse/block the sun.

anyone use this stuff before? any suggestions?

thanks,
rob.

 

[IGBT]

..I've seen fiberglass panels used for that effect. now there's some kind of fabric? I'll bet it's fiberglass weave.