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The four types of roof sheathing are plywood, oriented strand board (OSB), planks, and tone-and-groove boards. The overwhelming majority of homes use the first two (especially OSB) and the other two are not often seen outside of special use cases. Methods of sheathing include solid sheathing, open sheathing where there are gaps, and plank sheathing. Most roofs are solid sheathing.

If your roof has storm damage, there will be some telltale signs. These include missing, loose, or damaged shingles. You may notice cracks or dents on the metal parts of your roof, like flashing, gutters, or metal panels. Water leaks are another big indicator. So are visible signs of impact. Rather than climb up on your roof to check, hire a professional to inspect the area  safely.

Rolled roofing averages $1.50 to $3 per square foot, with an average installation price of $7,500. This is less expensive than the normal cost for new roofs—traditional styles run between $4.35 and $11 per square foot, averaging $14,400.

A roof replacement can take anywhere from one to 14 days. For most homes, a full replacement that includes tearing off old materials takes about one to two days, though the average project can last up to 12 days. The exact timeline depends on several factors, including the roof's size and complexity, the type of roofing material, the crew size, and weather conditions. Certain materials take longer to install; for example, metal roofs can take seven to 14 days because the material is more difficult to work with than asphalt shingles, wood, or tile. A re-roofing project, where new shingles are installed over old ones, can take half the time or less. It's also important to factor in the time needed to obtain necessary permits. A professional roofing contractor will typically complete the job faster than a DIY approach.