I've got a Genesis Silver B that I am wanting to use on my deck when it is raining. It is an open sided deck so ventilation isn't a problem but it is covered with plastic sheets (they kinda look like a plastic version of metal roofing material). Do you think the heat would be too much and I'd be at risk of melting or warping them or would I be ok. I'd say there is at least 4-5 of clearance at the lowest point and maybe 6 at the highest point.

Anyone else keep their grill under something similar or have any advice??

If the panels are FRP- fiber reinforced panels, than you should be fine as far as heat.
But if they are Polycarbonate panels, I would advise you not to do it. Poly is only rated on the top side, not the bottom.

Tim

The good thing about rain is that it is generally accompanied by a breeze (or a gale) I have both Poly Carbonate and metal over my Outdoor Decking. I situate the genesis/performer/Q220 so that it/they are on the opposite end to the prevailing wind and cfook away. The breeze blows away the cooking smells, greasy exhaust and keeps the roof cool. No problems, I have been doing this for 10 or more years.

Cheers

they are just clear plastic panels, its definitely breezy and open air on it. good thing I still got some time to figure this one out. most of the time I just fire up the charcoal grill but I'm tired of dealing with my go anywhere gasser when I its pouring. its too tiny and the burner blows out to often.

thanks for the tips!!