The length of time (time lag) required for a ‘driving temperature ‘to cause heat flow through a building element;  used in calculations of ‘transient heat  flow’.  Ranges from less than 1/2 hour in lightweight materials to over 36 hours for concrete slabs-on-ground.

The heat added to or removed from a body in the change of state from solid to liquid or liquid to gas (added) or vice versa, (removed), not causing a change of temperature;  cf sensible heat, which causes a change in temperature.

Concrete which has been made less dense

Construction in stud frame or brick veneer, generally with a suspended timber floor, providing little thermal storage capacity.

Formwork which is left in place permanently, often to provide the required finished surface.

Can be glass, used as windows (fixed or adjustable), or in aluminium or steel, used for shading. Louvres used for shading should be used vertically to east and west, and horizontally on the north and south. 

Low-frequency / long-wavelength radiation (above 5 micrometres); the range of the heat flow in the walls and roofs of buildings. White paint is a good reflector of visible light, but a poor reflector of room temperature radiation.