dimanche 14 décembre 2014

Radiant Barrier Paint Must Be Selected With Great Care

By Lucia Weeks


Different jobs require different coatings. The term "radiant barrier paint" is commonly used to refer to low-emittance paints used to reduce heat loss in buildings. Most heat loss occurs where a large surface area is open to the air, where it will usually cool quickly. Low-emittance coatings or interior radiation control paints improve the thermal qualities of the surface by reducing radiant heat transfer.

Under strict testing specifications, demonstrations have shown that retrofitting a coating to structures made from steel sheets with fibreglass insulation already in place has an effect on heat loss. IR (infra-red) imagery scanning also confirms the fact that a material like this diminishes heat losses from frame houses with unventilated loft spaces. Thermometer analysis in attics of these houses further verified that loft temperatures were reduced after the use of thermal barriers, confirming that less warmth was being conducted through ceilings after painting. Condensation is unlikely to develop as the space between the coating and the roof will in all probability never attain the dew stage.

In the present day's greener social climate, heat loss reductions and the consequential energy economies are a twofold blessing. Declining energy resources in tandem with ever-increasing power costs make every possible saving highly desirable. Materials with high conductivity need treatments to restrict energy wastage.

Newly-built sports arenas and leisure developments are archetypal types of contemporary constructions with excessive energy expenditure. Over winter, warmth should be contained inside as much as possible, whereas throughout the summer, the heat of the sun ought to be kept outside. A swimming pool should be warm and ice rinks frozen.

Radiant heat waves are the biggest cause of heat transference - loss and gains - in man-made structures. Reflective insulation is the most cost-effective solution to this problem. Radiant barriers also significantly reduce lighting requirements.

Reflective Insulation Materials (RIMs) are a first-class alternative to out-of-date bulk laggings made from loose-fill cellulose or fibreglass. Thermal resistance (R-value) is measurable in Reflective Insulation Systems (RIS). These capacities prove the efficacy of reflective insulations in decreasing the heat lost through sub-floor spaces, air-ducts, walls and ceilings.

Technical documentation built up over nearly 100 years of research attest to the properties of reflective technology in reducing modern energy demands in buildings. Low-emittance surfaces are key to diminished energy costs. Proper installation by qualified professionals abiding by published standards and manufacturers' guidelines is essential to achieve the desired R-values. This also applies to providing the necessary thermal resistance ratings and water vapour resistance values.

Low weight, ease of handling and superior light distribution are further advantages of this sort of paint over and above its proven success in cutting down the fuel bills in residential houses and business properties. Regrettably, the classification of such a paint as stipulated by the American Society of Testing and Materials International (ASTMI) is currently not achieved by any of the available products. Many firms market their commodities using speech marks in order to separate their varieties of paint. The IR emittance reduction ratings of such paints mean that they might be more accurately described as "interior radiation control coatings".




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