GRP/Fibreglass info needed

[irving2008]

There's a proprietary product that claims to need only 1/10 of the ballast by directing the airflow to create negative lift, but none of the pics I've found give enough detail to see how its done :(

Tried the installer route... one suggested standard ballasted approach until I asked about loading then he wanted £700 up front for structural engineers report before he'd discuss further. Two others said they couldn't help....

Anyway, I don't want an installer, my sparky will do it, installers want to load the kit by 25% margin and charge £1500 for a days work roughly! Just so I can get the pointlessly low feed in rates that the gov now gives. Makes the ROI go from 3y to 8y...

Not even sure that is true Irving. Obviously it depends on wind direction and strength, but according to Bernouli, (can't remember spelling) wind blowing between the surfaces will cause a reduction of pressure on the underside, so in some instances will actually create negative lift (downforce). Anyway that is all academic - try to pass all responsibilty on to the installer!!! Good luck. G.