Residential Roofing Glossary
- Cricket
- A wood-framed structure that diverts water away from chimneys, walls or other vertical roof projections and penetrations; also called a saddle.
- Deck
- The substrate over supportive framing to which roofing material is applied; also called decking or sheathing.
- Drip edge
- Flashing made of steel or other non-corrosive material that is placed along the eaves and rake edges at a 90º angle to let water runoff drop clear of fascia and into the gutters.
- Eave
- A roof edge that extends past the exterior wall line.
- Fascia
- Vertical roof trim located along the perimeter of a building, usually below the roof level, to cover the rafter tails at the eaves. Also called the boards behind the gutter.
- Felt
- Material of interwoven fibers saturated with asphalt and used as a protective under layer between shingles and decking; also called tarpaper.
- Flashing
- Metal or other flexible material used to seal the roof and prevent leaks around any projection or intersection, such as pipes, chimneys, dormers, valleys or adjoining walls.
- Flat or low slope roof
- A roof with a pitch of less than three feet of rise over a twelve-foot run; this type of roof needs a sealed system installation.
- Hip
- The external angle formed by the intersection of two sloping roof planes; from the ridge to the eaves.
- Ice/Leak barrier
- A self-adhering and self-healing membrane applied to the roof deck and designed to protect against water infiltration from ice buildup or wind-driven rain.
- Laminated shingles
- Strip shingles made with fiberglass mat and asphalt that are laminated, or textured, to create a three-dimensional effect. Also called dimensional or architectural shingles. There are also shingles that are called dimensional though they are made from a single material, not two materials laminated together.
- Pitch changes
- The variation in the degree of roof incline, which is expressed as the ratio of the rise to the span, in feet.
- Pitch Pocket (A.K.A. Pitch Pan)
- A flanged piece of flashing material placed around irregularly shaped roof penetrations and filled with grout and a pourable sealer to seal around the penetration in order to seal it from against moisture entry. Pitch pockets are a good source of leaks and should be avoided if possible. For an example on how to properly fill a pitch pocket, click here.
- Plumbing boot
- A prefabricated covering, usually of flexible material, used to seal around a penetration; also called a pipe boot.
- Rafter
- The structural member supporting the deck and roof system components, extending from the down slope perimeter to the ridge or hip.
- Rake
- The inclined edge of a sloped roof over a wall from the eave to the ridge, and usually perpendicular to the eave and ridge.
- Ridge
- The horizontal external angle formed by the intersection of two sloping roof planes, i.e., where the two sides of a roof meet at the highest point.
- Ridge vent
- A type of roof exhaust vent that ventilates the attic along the ridge or hip line where the roof deck has been cut back; works in conjunction with soffit vents under the eaves.
- Roof ventilation
- A static, wind- or power-operated system for removing hot air and moisture from the air under your roof. Includes ridge vents.
- Shed roof
- A roof containing only one sloping plane; a single-pitch roof, with no hips, ridges, valleys or gables. Also called a half gable. The area at the top is called a clearstory.
- Soffit
- The finished underside of the eaves, or roof overhang, which can be enclosed or exposed.
- Soffit vent
- An intake vent in the soffit area of the house that provides attic venting at a lower portion of the roof deck and good circulation with other forms of venting such as ridge or roof vents.
- Valley
- The internal angle formed by the intersection of two sloping roof planes running from the eaves to the ridge, allowing water to run off.
- Water shield
- A watertight barrier used to seal water out at the eaves and rakes, in valleys, and around chimneys and skylights.
Contact Information
Roof Maintenance.ca
GTA's #1 Commercial Flat Roof Contractor, specializing in flat roof repair, flat roof replacement and maintenance since 1999.
- Mailing Address
- 1630 Sismet Road Unit 1
- Mississauga, ON. L4W 1R5
- Residential Inquiries
- Tel: 647-727-4333
- Email: m.info@roofmaintenance.ca