You can knock the snow off from time to time. You can use a push-broom to pull snow down off of it. Or, if you can get the door open, you can go inside and flex the walls out to knock the snow off. Praying is a good idea too - good luck!

Agree, push snow off if possible. Mine is too big and tall for that so I've melted the snow off once with heater set on blast. 30 inches will crush most greenhouses.

Thanks gang! We will probably do a combo of both...heat it up and knocking down the snow. With this much snow coming dear hubby will have to shovel a few times , so he will be able to keep the walk way and driveway passable. So it wont be a big deal to keep an extra path to the GH so I can manage the snow.