spoungey roof

Old 06-14-05, 12:58 PM
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spoungey roof

i live in a double wide mobile home in south carolina, i was up on my roof and the shingles all looked good, but the roof felt awfully spoungy. the house is ten years old. what could be wrong, thanks trullac
Old 06-15-05, 05:23 AM
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mobile home dont' have trusses .
thats why they fell spoungy.
Remember 1 square of roof shingle is 210 pound
thats a section 10x10 ft.
and they mobile home have no trusses and thin sheeting on roof
never double the roof shingles

regular house have trusses that support 90 pounds per square inch
Old 06-16-05, 07:02 PM
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Many mobile homes and "modular" homes have only a 3/8" decking, along with a pitch that is really to low for the shingles to work without extra underlayment treatment....which they do NOT do at the mobile/modular home factories. This can result in rotted decdking, even though it might never have leaked in to the interior.

On the other hand, it's possible it's just a 2by2 "rafter problem.
Old 06-17-05, 09:30 AM
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Agreed; Bare minimum structural frame.
Your foot-falls (150lbs.+ per sq.ft.) more than likely exceed the live load/dead load capacity of the roof structure. Now if your foot breaks through....thats a different story.

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