Manufactured Home Roof

[wrandolph]

I was call out to inspect a Manufactured home roof (2000 yr, gable, 3-tab, 3/12 slope) for insurance reasons. I found that the first 1 to 2 feet from facial board on the west side was rotten. It a appears to be from wicking back under the shingles. Has anyone come across this on a MH? I’m looking for any other explanations to explain this. Thanks for any help.

[Barry Adair]

This will occur on any type structure, not just MH.

Composition shingles should not be applied on slopes less than 3 1/2:12 unless special precautions/additional underlayment is applied. Consult the manufacture instructions for further details.

[Gerry Beaumont]

Originally Posted by badair

This will occur on any type structure, not just MH.

Composition shingles should not be applied on slopes less than 3 1/2:12 unless special precautions/additional underlayment is applied. Consult the manufacture instructions for further details.

Agreed, unfortunately several manufacturers of HUD homes fail to install roofs properly, that roof will require a complete tear off repair and reshingling properly.

Regards

Gerry

[dbronsted]

Well here is my two cents worth...is the roof also properly vented??..rotting from condensation does not always occur at the peak..I agree that composition shingles should not be used on a roof of less than 3/12 but my father who was a roofing contractor all of his life said that anything under 4/12 should be installed with 4" to the weather instead of 5". Anyway ice or snow can back up under the shingles causing the roof to leak. One other note here. The real barrier against the weather is the underlayment. Does it exist? I have seen shingles installed without it. Would not surprise me on a manufactured home. One other thing I've seen in manufactured homes is wires spliced in the walls without junction boxes. Anyway the decking is gonna have to be replaced where it is rotten.

[James Eubank]

In a recent mobile home inspection, I recommended that the roof be evaluated by a licensed roofing contractor. The roof was some kind of thin metal, like sheet metal, covered with a thin layer of white roof coating. There didn't appear to be any decking under it - when I put my weight against it, it sagged and almost gave way. When the wind blew, we could hear the roof rattling. I didn't try to walk on it, for fear it would collapse. There were a couple of leaks visible from the inside.

The client took my advice and had two different roofers check it out. Incredibly, both of them told her that it was a common roof for a mobile home, and it didn't need repair. When she told me that, all I could say was, "Oh?" I usually defer to a licensed specialist contractor's opinion. So I didn't argue, but I did suggest that she should get those opinions in writing. And if she had asked, I would have to honestly tell her that I don't agree. Mobile homes are less costly than other homes, but that doesn't mean they deserve a lousy, leaky roof.

[dharris]

[quote=jeubank]

In a recent mobile home inspection, I recommended that the roof be evaluated by a licensed roofing contractor. The roof was some kind of thin metal, like sheet metal, covered with a thin layer of white roof coating. There didn't appear to be any decking under it - when I put my weight against it, it sagged and almost gave way. When the wind blew, we could hear the roof rattling. I didn't try to walk on it, for fear it would collapse. There were a couple of leaks visible from the inside.

Thats the way they have been for 40 plus years, Through some tires on the roof, the roof rumble goes away , seal vents, replace plastic vents, seal drip edge trim, and make sure the leak is not from condensation due to lack of ventilation since the roof was coated, the roof will last another 20 yrs.



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[Larry D. Kage]

Originally Posted by dharris

Thats the way they have been for 40 plus years, Through some tires on the roof, the roof rumble goes away , seal vents, replace plastic vents, seal drip edge trim, and make sure the leak is not from condensation due to lack of ventilation since the roof was coated, the roof will last another 20 yrs.



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I loaned my crystal ball to my grand daughter and, I should've known, she likes it so much she doesn't want to give it back...but really, it's better for me not to try to predict the future anyway...and, on top of that, there was a recall on the ball I had...seems it wasn't designed to take some other things into consideration when giving the predictive answers.