The vertical angle of a sloping surface such as a roof, measured from the horizontal.

A panel eg of brickwork forming a wall between columns, not forming part of the supporting structure of the building.

The air changes in a building between interior and exterior air that take place ‘involuntarily’ through cracks and openings (eg under doors, around window and door openings), and in former times up chimneys. In common parlance they are called draughts when not wanted. Across the tropical zones building construction allows a relatively high level of infiltration compared for instance with Scandinavian building construction.

Materials or combinations of materials used in buildings (eg in roofs and walls) to reduce unwanted heat transfer from one side of a building element to another.

Strength (eg of solar radiation). 

A measure of the rate at which internal building surfaces absorb heat;  measured in W/m².K