Roofing Areas and Terminology

Areas of a Roof / Roofing Terminology

Constructed-up Roof
A low-slope (or flat-seeming) roof included with alternating levels of roofing felt and very hot-mapped asphalt and topped off with a layer of gravel.

Cornice
The portion of the roof projecting out from the aspect partitions of the house.

Counterflashing
The flashing which is imbedded at its prime in a wall or other vertical structure and is lapped down in excess of shingle flashing.

Classes
Horizontal rows of shingles or tiles.

Deck/sheathing
The area, usually plywood or oriented strand board (OSB), to which roofing elements are used.

Dormer
A smaller structure projecting from a sloped roof, usually with a window.

Drip Edge
An L-formed strip (usually steel) mounted alongside roof edges to allow h2o run off to drip obvious of the deck, eaves and siding.

Eaves
The decrease edge of a roof (usually overhanging outside of the edge of the house).

Fascia
Trimboard behind the gutter and eaves.

Felt
The “tar paper” employed by roofer, usually produced of a blend of asphalt and both paper or rags.

Fire Score
System for classifying the fire resistances of various elements. Roofing elements are rated Course A, B or C, with Course A elements owning the optimum resistance to fire originating outside the house the structure.

Flashing
Sheet steel or other material employed at junctions of various planes on a roof to avert leakage.

Frieze Board
A Board at the prime of the house’s siding, forming a corner with the soffit.

Gable
The triangular upper component of a wall closing the finish of a ridged roof.

Hip
The external angle at the junction of two sides of a roof whose supporting partitions adjoin.

Joist
In a flat roof, a horizontal structural member in excess of which sheathing is nailed.

Louvers
Slatted units mounted in a gable or soffit (the underside of eaves) to ventilate the space underneath a roof deck and equalize air temperature and humidity.

Oriented strand board (OSB)
Roof deck panels (4 by eight ft) produced of slim bits of wood, mounted lengthwise and crosswise in levels, and held alongside one another with a resin glue. OSB frequently is employed as a substitute for plywood sheets.

Penetrations
Vents, pipes, stacks, chimneys-anything at all that penetrates a roof deck.

Rafter
A structural member (usually slanted) to which sheathing is nailed.

Rake
The slanting edge of a gabled roof extending outside of the finish wall of the house.

Ridge
The horizontal line at the prime edge of two sloping roof planes.

Sheathing
The rigid material (frequently on inch by 6 inch or one particular inch by twelve inch boards or sheets of plywood) which is nailed to the rafters, and to which shingles or other outside the house roofing elements are secured.

Shingle Flashing
Flashing that is laid in strips below each individual shingle and bent up the edge of a chimney or wall.

Slope
The range of inched of vertical rise in a roof for each twelve inches of horizontal distance. Also referred to as pitch.

Soffit
The boards that enclose the underside of that portion of the roof which extends out outside of the sidewalls of the house.

Square
A single hundred square ft of roof, or the sum of roofing material required to cover 100 square ft when correctly used.

Truss
Engineered elements that nutritional supplement rafters in quite a few more recent homes and buildings. Trusses are built for unique programs and simply cannot be slice or altered.

Underlayment
The material (usually roofing felt) laid on prime of sheathing just before shingles are used.

Valley
The considerably less-than one hundred eighty-diploma angle where two sloping roof sections come alongside one another.

Valley Flashing
The flashing in valleys, extending in below to shingles on each sides.

Vapor Retarder
A material built to limit the passage of h2o vapor via a roof method or wall.