Valley

The area runs from the top of a ridge, to the bottom edge of the roof, between two joining roof slopes.

Ridge

The top peak of the roof, where opposing slopes come together at a point.

Gable

A gable is the generally triangular portion of a wall between the edges of a sloping roof.

Hip

A hip roof, or hipped roof, is a type of roof where all sides slope downwards to the walls, usually with a fairly gentle slope. Thus it is a house with no gables or other vertical sides to the roof. A square hip roof is shaped like a pyramid.

Flashing

Is used to terminate a exterior structure or siding to the roof surface. Flashing is typically 26 gauge metal, bent to conform to the roof slope and then turned up on to a chimney, skylight, wall, or dormer.

Pipe Flashing/Collar

PVC plumbing vents are run up through your roof for proper drain flow. Pipe flashing or pipe collars are used to seal these pipes to the roof. Typically pipe flashings are made of a galvanized base, with a rubber sealing collar, or of pliable lead.

Roof Jack

A galvanized stack made to cover dryer ducts and kitchen vent-a-hood stacks, that are run through the roof deck.

Decking

The plywood or hardwood substrate below your shingles. Typically, homes are constructed with 1/2" thick plywood or 7/16" thick OSB.

OSB

Oriented Strand Board, "waffer board" style plywood

Roll Roofing

Comes in 3 foot wide, 33 foot long rolls. Flat, roll style product, topped with roofing granules available in several colors. Used commonly on patios or sun-rooms.

Modified Bitumen

Pronounced "bid-u-man". This roll roofing product is a premium grade, low slope roofing that is topped with colored granules. Can be applied with hot tar or a cold application cement. Designed for flat roofs, patios and garages, modified has elastic capabilities that allow it to stretch rather than crack.

HVAC/Furnace Cap

An exhaust vent runs from your interior air conditioning air handler, up through the roof. A storm collar, base and ring are installed to secure it to the roof and a cap is placed on top of the vent. The caps are susceptible to hail damage and are commonly replaced.