2 Roof Layers On Manufactured Home

I found that the first 1 to 2 feet from facial board on the west side was rotten.
2 roof layers on manufactured home. When a buyer is purchasing a home their homeowner s insurance carrier will inquire about the age of the roof and the number of layers. Will this ad too much weight to the roof structure. Some day you are at home depot try picking up just one bundle of shingles and you will realize how many thousands of pounds of shingles you have on your roof. The home is 14ft wide and doesn t a long roof span on each side.
Others roofing experts have told me they won t do it on any manufactured home. Additionally it prevents wind driven rain from getting under your shingles and causing damage to your roof structure or the inside of your home. Shingles asphalt shingles come in two major types 3 tab and architectural. It a appears to be from wicking back under the shingles.
Considering the fact that most manufactured homes have smaller sized lumber for roof rafters and then probably 1 2 or less thickness for roof decking plywood or o s b i would not add anymore weight to the roof. If you have an asphalt shingle roof. I was call out to inspect a manufactured home roof 2000 yr gable 3 tab 3 12 slope for insurance reasons. Two layers is usually all they do.
Thanks for any help. Has anyone come across this on a mh. 2 roof layers on manufactured home statements were made that multiple roof layers are not allowed on these structures. Can anybody comment on this or better yet give me the hud requirements.
I m looking for any other explanations to explain this. Yup too much weight. Some roofing experts say you can do on manufactured homes that have 2 4 studs 12 16 oc and roof trusses that are 16 oc or less. 3 tabs are less expensive but also less durable have lower wind resistance and have a flatter appearance.
If the roof has multiple layers typically the insurance company will only insure the top layer. The roof seems to be solid and the home is taken care of. On site built homes two or three layers of shingles are acceptable but on a mobile home only one layer is permissible.