Firestone Rubber roofing is totally impervious, maintenance-free and removes the need for re-felt, ever! We would always recommend a rubber roof on buildings 10ft and above.
Please note that as the Royal has a 2ft roof overhang, the size of the rubber roof you require is one size bigger. i.e. If you order a 10×8 Royal, the size of the rubber roof you require is 10×10.