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TOPIC: Roof Pitch

Re-roofing a mobile home

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I am planning to re-roof some older mobile homes (10' & 14' wide). Weight is of primary concern. I plan to create special lightweight trusses with the lowest slope I can use. I will place a vapor barrier on the ceiling before adding about 6" to 12" blow-in insulation. I would like to fasten the metal roof to horizontal laths across the trusses . Ridge venting on a low slope roof seems to be a bad idea due to rain/snow blow in. Soffit and eave vents seem to be the best bet. Since I cannot afford the weight of boards or plywood to support tar paper what should I do to handle condensation?
Guest User

7/18/2003
With proper ventilation, meaning an intake and an exhaust, condensation should not be a problem. In the case you described, you still need an exhaust. Make certain that the roofing panel you're using is appropriate for the roof pitch. You might consider all metal framing in order to reduce the weight further and be able to install adequate pitch for a ridge vent. Todd Miller
Todd Miller
Isaiah Industries, Inc.

7/18/2003
I should have said I was in Utah and we get snow which can cause condensation. I plan to use Triflex 30 under the metal. Where can I find more information on metal framing? What would be a minimum slope to use a ridge vent?
Guest User

7/24/2003
There are numerous mobile home re-roof systems available, many of which are metal. An internet search can help reveal them. If you want to custom-build something, you will need to either work with an experienced metal framing contractor or work with a structural engineer for the purpose of designing an appropriate all metal structure. You need to allow for snowloads but you also need to avoid putting too much weight on the existing structure. Most ridge vent designs would be best for at least a 3:12 roof pitch, if not more.
Guest User

7/25/2003