Roofing a double-wide trailer follows the same steps as roofing a regular trailer. Mobile homes often have flat roofs that consist of roofing that rolls on. They are easy to install compared to asphalt or shingle roofs and involve fewer steps. While they may not last as long as the other types of roofing, they are less expensive and are still durable if sealed once a year and taken good care of.
Measure the length and width of the roof and multiply them together to get the total square footage. Inspect the sheathing on top of the roof to make sure there are no leaks or damage to the plywood.
Roll out the felt underlayment over the top of the roof. Spread it out beginning in any corner and work to the end of the first side. Nail it in place with roofing nails and cut it at the end of the first row with a utility knife. Overlap the second row by a few inches and nail it in place just like the previous layer. Continue until the entire roof is covered with underlayment.
Spread roofing cement over a small section of the underlayment with a trowel beginning in any corner of the roof. Begin rolling out the roll roofing. Push down firmly to adhere it to the underlayment and add more cement. Continue down the first row just like the underlayment was applied and cut the edge with a utility knife.
Install the second layer just like the first and continue until the entire roof has been covered. Smooth out the surface by running a roof roller over the area to flatten out any bubbles. Allow a day for it to dry and adhere in place.
Pour roof sealer over the top of the roof and connect a paint roller to an extension pole. Spread out the sealer with the paint roller to cover the whole roof and seal up any gaps or cracks in the roof.