[The Newell]

There's only so much you can do. It's not worth risking life and limb climbing up on a snow/ice covered roof to shovel it off that's for sure. I don't think any RV roofs are actually tested for overall weight-bearing capabilities, so there's probably no known answer to the "how much" question. Now of course you can always give Newell Coach a call and see if they can answer your question.

Joseph