Glossary of Terms

Below is a glossary of metal roofing terms that you will find helpful when considering a steel roof.

Caulking: The process and material used to seal a joints or seams in various structures.

Cladding: The material used on a building’s exterior wall enclosure intended to control infiltration of weather elements.

Class A, B and C Fire Ratings: These ratings indicate the resistance of a roofing system to fires originating from sources outside of the building. Camero products are classified under the highest fire rating, Class A.

Coil Coating: The continuous process in which paint is applied to both sides of a moving strip of metal. The process usually includes cleaning, chemical pre-treatment, primer, and topcoat.

Condensation: Occurs when warm moist air hits a cool surface, which can also occur on poorly assembled roofs. Ventilation, insulation, and vapor barriers are the keys to avoiding condensation in roof systems.

Drip edge: A metal flashing, or another overhanging component, with an outward projecting lower edge.

Eave: The very edge of the roof at the bottom of a roof plane.

Eyebrow: A small, shed roof protruding from the main roof or located on the side of a house below the level of the main roof.

Flashings: Components used to help waterproof the perimeters and protrusions in a roofing system.

Gable: The edge of the roof that runs from the eave to the ridge.

Galvanized steel: steel with a protective alloy consisting primarily of zinc on both sides of the steel. Camero offers G90 grade of galvanized steel, which is optimal for residential applications.

Hip: The inclined external angle formed by the intersection of two sloping roof planes, which runs from the ridge to the eaves.

Roof Deck: The surface installed over the supporting framing members to which the roofing material is applied.

Ice Damming: When snow melts on an upper section of a roof surface and then refreezes at the eaves where the roof surface is colder. This causes water to back up, causing leaks into the roofing system.

Roof ladder: A ladder that is installed on the roof that is specially designed for steep pitch roofs to allow accessibility.

Parapet Wall: Part of a perimeter wall immediately adjacent to the roof which extends above the roof.

Pitch: The slope of the roof plane, commonly referred to as the height of rise over length of run. Most metal roofs can be installed on roof pitches of 4:12 or greater but many systems can be installed on shallower roofs.

Ridge: The very top section of the roof running the length of the roof, where the two roof slopes come together.

Ridge Vent: An outtake vent for air integrated into the peak of a sloped roof. A ridge vent allows warm, humid air too escape the attic space.

R-Value: The measure of a material’s resistance to heat flow. The higher a material’s R-value, the more it insulates.

Slope: The angle of a roof’s surface.

Snow Breakers: Commonly used in areas with heavy snowfalls to help break apart snow so it does not fall off of the roof surface in large pieces and harm people or property.

Skylight: A roof accessory designed to allow light into a living space.

Square: Refers to enough product to cover approximately 100 square feet of the roof.

Starter Strip: Used to begin the attachment of many metal roofing systems. It is used at the bottom of the roof (eave) on many metal shingle systems.

Underlayment: Commonly 30 lb felt or a synthetic sheet installed on the roof deck below the metal roofing material. This is required by code beneath all metal roofs, even if the old shingles are left in place.

Valley: The internal angle formed by the intersection of two sloping roof planes to allow water runoff.

Wall Flashings: Components used to help waterproof the wall perimeters and protrusions in a roofing system.

Side wall: The flashing that joins the roof panel to the wall.