The capacity to store and regulate heat internally is known as the Thermal Mass. A high thermal mass means it will take a long time to heat up, and a long time to cool down. This results in a constant internal temperature. On the other hand, if a building has a low thermal mass, wide fluctuations in its internal heat are possible.
Many elements within the house contribute to its thermal mass – with the best heat-storing materials being those with more density, and therefore heat up slowly. In heating up slowly, they then distribute their heat gradually.
Materials such as brick, concrete and stone have a high thermal mass. Water also has a very high thermal capacity and is well suited to central heating systems. Air, however, has quite a low thermal capacity whilst it warms up quickly, it does not maintain its heat for long. Once walls and floors are warm, only then will air preserve its heat. Highly insulated walls and such items as underfloor heating within a high thermal mass material both help to provide a managed and comfortable environment.
Focusing on creating a high thermal mass is important in reaching a great energy efficiency rating. Consideration of which methods of construction you choose is also a major consideration at this stage. We will help you decide what works best for you or your given site conditions.