There are minimum r value requirements for these parts of your home specified under the building code of australia bca and dictated to by the state and climate zone in which you live.
Thermal properties of concrete walls.
Thermal mass properties the thickness of the material and the method of construction will change the r values of your walls and roof.
The common ones are 400 grade and 500 grades.
Common small sized concrete.
The thermal properties of precast concrete help improve a building s energy performance.
And the thermal conductivity is 0 12 w m k the same with aerated concrete.
The compressive strength of 500 grade is 2 3 0 mpa.
Concrete sand gravel aggregate.
Wall thermal mass such as that present in concrete masonry construction tends to decrease both heating and cooling loads in a given building thus saving energy.
Guide to thermal properties of concrete and masonry systems.
0 13 0 64 30.
The porous concrete made by gas forming and autoclaving cement foam agent and water.
Outer walls and partition walls.
Typical residential weight concrete 8 wall r 2 5.
8 thick concrete slab or foundation wall has an r value of about 1 04 30 while lightweight aggregate filled 8 thick concrete has an r value of about 2 18 30.
It is an important asset for designers who need to cut heating and air conditioning costs associated with hvac systems and still keep building occupants comfortable.
3 for tabulated r values of walls with core insulation.
The absorption and storage of significant amounts of heat in a building or in walls of a building ref.
Concrete by itself has a very low r value a measure of thermal resistance.
Thermal mass is defined as.
Its insulation value comes primarily from using it in thick slabs and hence isolating the insulated space from thermal fluxes in the environment.
Properties of walls using lightweight concrete and lightweight concrete masonry units 11 0 introduction 11 1 thermal resistance and energy conservation 11 2 fire resistance 11 3 acoustical resistance 11 4 enclosure properties april 2007 expanded shale clay slate institute escsi 2225 e.
