Dictionary

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Click one of the letters above to be taken to a page of all terms beginning with that letter.
t
Tab

The exposed portion of strip shingles defined by cutouts.

Telegraphing

A shingle distortion that may arise when a new roof is applied over an uneven surface.

Thermal Resistance

An index of a material's resistance to heat transmission, the reciprocal of thermal conductivity (k) or thermal conductance (C).

Thermal Shock

The stress-producing phenomenon resulting from sudden temperature changes in a roof membrane when, for example, a rain show follows a brilliant sunshine.

Through-Wall Flashing

A water-resistant membrane or material assembly extending through a wall or its cavities, positioned to direct water entering the top of the wall to the exterior.

Toe Board

A protective board placed on a sloping roof to prevent workers from slipping or falling.

Tuckpointing

(1) Troweling mortar into a joint after masonry units are laid; (2) final treatment of joints in cut stonework. Mortar or a putty-like filler is forced into the joint after the stone is set.