Polystyrene Insulation Thermal Resistance

Grey polystyrene foam incorporating graphite has superior insulation properties.

Polystyrene insulation thermal resistance.

According to the building science corporation thermal drift is t he loss of r value over time in foam insulation that contains captive blowing agents. Resistance properties a high r value retained even after prolonged exposure in high moisture environments. Our patented process technology helps to ensure that celfort and foamular extruded polystyrene thermal insulation boardwill not corrode or decay over time celfort 300 foamular 400 600 and 1000 are type 4 closed cell thermal. When increasing the thickness of the polystyrene boards you will improve the thermal resistance.

Show 1 functional unit. Thermal conductivity of expanded polystyrene. Continuous insulation that resists moisture and many other adverse effects available in many compressive strengths and thicknesses including custom tapered for drainage slopes. Benefits exceptional insulation value.

The r value for foamular xps insulation is provided from testing at two mean temperatures 40ºf and 75ºf and from two aging conditioning techniques 180 day realtime aged as mandated by astm c578 and a method of accelerated aging sometimes called long term thermal resistance lttr per can ulc s770 03. Thermal conductivity is defined as the amount of heat in watts transferred through a square area of material of given thickness in metres due to a difference in temperature the lower the thermal conductivity of the material the greater the material s ability to resist heat transfer and hence the greater the insulation s effectiveness. On cold nights you will be able to reduce energy consumption by 50 while still enjoying a warm internal climate. However polyurethane insulation loses r value over time due to thermal drift.

However r value is widely used in practice to describe the thermal resistance of insulation products layers and most other parts of the building enclosure walls floors roofs. A single small scale test characteristic such as aging does not accurately predict the in service design thermal resistance of an insulation especially when the actual field verified performance of the insulation has already been confirmed in extreme real life environments. Polystyrene foams are good thermal insulators and are therefore often used as building insulation materials such as in insulating concrete forms and structural insulated panel building systems. Polyurethane insulation uses the thermal resistance of its blowing agent to attain higher initial r values.

Other areas of the world more commonly use u value u factor for elements of the entire building enclosure including windows doors walls roof and ground slabs. The thermal resistance of these boards is also very high which means that you are going to be saving a lot of money on your energy bills.