A material used to store heat, thereby slowing the temperature variation within a space. Typical thermal mass materials include concrete, brick, masonry, tile and mortar, water, and rock or other materials with high heat capacity.
Thermal movement
Movement of a material resulting from temperature changes.
Thermal resistance (r-value)
This designates the resistance of a material to heat conduction. The greater the R-value the larger the number.
Thermal shock
The damage to a roof resulting from expansion and contraction which are the result of sudden extreme temperature changes. Thermal Shock often occurs when a cold rain shower suddenly cools a roof during a hot day.
Thermal shock resistance
Ceramic tile's ability to resist alteration when subject to rapidly fluctuating extreme temperatures, determined by ISO testing method. (ISO 10545-9).
Thermal spraying
An industrial process where metal is melted and sprayed onto a surface to form a coating.
Thermal storage walls
A thermal storage wall is a south-facing wall that is glazed on the outside. Solar heat strikes the glazing and is absorbed into the wall, which conducts the heat into the room over time. The walls are at least 8 in thick. Generally, the thicker the wall, the less the indoor temperature fluctuates.
Thermal stress
Stress to a roof system or component caused by expansion and / or contraction from temperature change.
