Glossary of roofing terms

Anticon Blanket

Installed over the roof frame directly beneath metal roof sheeting, it consists of a glasswool blanket adhered to an impermeable reinforced reflective foil facing.


Metal flashing used where roof meets vertical faces such as walls, chimneys etc.

Barge cap

A flashing that is used to fix the gable end of the roof where the sheets start and finish.


A long strip of squared timber or rolled metal that roof sheets are screwed into.

Box Gutter

A gutter that’s not at an eave. Typically at the base of two opposing roof faces or inside a parapet wall.


Base metal thickness.

Ceiling batts

Typically made from glasswool, polyester, or wool they are a type of bulk insulation that is designed to fit directly above the home’s ceiling between joists, rafters or studs.


Colorbond is the brand name of a coated steel product manufactured by Bluescope Steel. Colorbond steel is produced with a Zincalume base to provide corrosion resistance and then covered with a chemically applied conversion layer to enhance coating adhesion. On top of this goes a baked on epoxy primer and finally a baked on exterior grade top-coat


A pipe that carries rainwater from the roofs guttering to a drain or to ground level

The external ceiling between the fascia and the building’s outside wall.

Edge protection

A temporary safety rail system attached to the perimeter of the building to prevent falls from roofs of certain heights

A portion of the roofing area defined by having four separate edges. A single side of a gable or hipped roof


A timber board or rolled metal product of similar dimensions, fixed along the eaves to which gutter is secured

Materials used to waterproof a roof around any projections

Traditional roof style; two peaked roof planes meeting at a ridge line of equal size.


A shallow trough fixed under the edge of the roof made to assist in carrying off water

Hip Roof
A roof with four roof planes coming together at a peak and four separate hip legs.

The area where rolled roofing or insulation overlap one another during installation


A wall on the perimeter of building that projects above the line of the eaves


The slope of the roof or gutter often expressed in degrees


Pooling of undrained water on a roof

R Value

A value given for the resistance to heat transfer of a roof or wall system


The horizontal angle on the outer part where two sloped roofs meet


A layer of flexible foil insulation typically installed under roof tiles when the roof is being installed


A single sloped roof, generally not attached to another roof.


A roof gutter pit used to connect downpipes to internal roof gutters


Fine filings or chips of metal that come off metal when cutting or drilling

When a roof plane ties into another roof plane that has a different pitch or slope.

Area where two adjoining sloped roof planes intersect on a roof creating a “V” shaped depression.

Window Hood

A decorative awning that covers the top of a window to protect from the weather 


The brand name given to a coated steel product manufactured by Bluescope Steel. The steel is coated in Zinc/Aluminium alloy to increase its resistance to corrosion