Jeremy Hays

Roof underlayment is a water-resistant layer installed directly over the wood deck and under the shingles. It is the backup line

Ordinance or law coverage is a provision some property policies include that relates to the extra cost of meeting current building

Roof flashing is thin material, usually metal, that seals the joints and gaps where the roof surface is interrupted or meets

Ice and water shield is a self-adhering waterproof membrane that goes on the roof deck in places where water is most

Drip edge is a thin strip of metal, bent at an angle, that runs along the outer edges of a roof.

A shingle wind warranty is a manufacturer's written statement about how well its shingles should hold up in wind, usually tied

An actual cash value (ACV) policy pays for a damaged roof based on what the roof was worth at the time

A roofing square is a unit of area equal to 100 square feet of roof surface. Roofers use it as shorthand,

A roof valley is the inside angle where two roof slopes meet and slant toward each other. It works as a

Roof vents are openings that let air move through the attic. The main types are ridge vents along the peak, box