Applying a Liquid Rubber Roof In Cold Temperatures

I would get a cover or even a large tarp for the winter. Wait until the weather is warmer to apply the Heng's.

I used Heng's to our 96 Southwind a year ago. it's holding up well.
But, I applied it during warm weather. It may or may not cure properly the way you want to apply it to your roof.
I wouldn't take the chance.