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Roofing application method in which shingle courses are applied vertically up the roof rather than across and up. Not a recommended procedure.


The supporting framing member immediately beneath the deck, sloping from the ridge to the wall plate usually 16 or 24 inch on center.

Rafter tail

The lower end of a roof truss that extends beyond outer wall.


The inclined edge of a sloped roof over a wall from the eave to the ridge

Random-tab shingles

Shingles on which tabs vary in size and exposure.

Release tape

A plastic or paper strip that is applied to the back of self-sealing shingles. This strip prevents the shingles from sticking together in the bundles, and need not be removed for application.

Re-cover (overlay)

The installation of a new roof system over an existing system without removing an existing system.


Installing a new roof system on a building that is not new.


The uppermost, horizontal external angle formed by the intersection of two sloping roof planes.

Ridge Venting

A vent system used along the horizontal top of a roof for much better air space ventilation which is rated approximately 14 sq. inches per foot.

Rigid insulation

Dense insulation boards nailed over a roof deck that is the finished ceiling.


The vertical distance from the eaves line to the ridge.

Roll roofing

Asphalt roofing products manufactured in roll form which are not approved for residential use.

Roof scaffolding

Brackets used on steeper roofs that hold 2×6 boards to prevent sliding.

Roof to wall flashing

Flashing used at top of roof section that is over the roofing and under the siding.

Roof top loading

The delivery of roofing material to job site set on top of the roof structure.

Roof truss

A framework of beams forming a rigid structure.

Roofing tape

An asphalt-saturated tape used with asphalt cements for stabilizing flashing and patching asphalt roofing.


The vertical distance from the eaves to a point directly under the ridge. One half the span.