What does a roof cost for a double wide?
The pitch question comes first
Asphalt shingles need a slope of at least 2/12, and between 2/12 and 4/12 the code calls for a double layer of underlayment. Many newer double wides are built at around 3/12 or steeper and take shingles fine. Older units are often flatter, which points to metal panels or a membrane roof instead of shingles.
The marriage line
A double wide arrives in two halves that are joined on site. The seam where the halves meet runs along the ridge, often called the marriage line. If the original ridge was closed with a quick cap or tape, it is a common leak spot. A replacement should seal and cap that ridge properly and ventilate it if the design allows.
Structure and decking
Manufactured home trusses and decking can be lighter than site built framing. Before adding weight, such as a second layer of shingles, someone should check the deck thickness and condition. Soft spots near the edges usually mean old leaks.
Common options
- Tear off and reshingle when pitch and deck allow.
- Metal roof over, a frequent choice on older, lower slope units.
- Membrane roof on very low slopes.
Your county may require a permit for any of these; see roofing permits in Georgia, and read roofing over existing shingles before choosing an overlay.