Sarah writes from Coden, Alabama: "How do you install fanfold insulation panels over a curved mobile home roof? The rafters are 2 ft apart. The manual that I am using merely says lay it out and duct-tape the seams. This seems a little dicey should a wind come up. If it can be secured with glue, what glue can you use and not melt the covering?"

Answer: Fanfold is a re-siding board used over existing vinyl siding before adding new siding to a home. We have no recommendation for using it on a roof. We are not familiar with the manual you refer to in your note. If you want to discuss the situation with a customer service representative, call Owens Corning at 1-800-GET-PINK™ (438-7465).