This will reduce your long-term costs, as each portion of a job will come with fixed costs, and it will ensure that your roof is uniform in color. If you’re installing a standard asphalt roof and choose to do the work yourself, you can expect to save thousands on labor—but we don’t recommend it. Even beyond the safety hazards, the potential for hidden (and potentially disastrous) expenses is extremely high for this project. Steeper slopes often mean more materials are necessary, pushing up installation costs. For an unusually steep roof, you might spend anywhere from $1,000 to $3,000 extra in labor and materials.