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jeudi 11 décembre 2014

Radiant Barrier Paint Must Be Selected With Great Care

By Lucia Weeks


The lower-emittance coatings employed in the pursuit of lessening the heat wasted by buildings are various. They are generally talked of as radiant barrier paint. Expansive surface areas when open to the elements tend to get cold rapidly leading to the biggest proportion of heat loss. Thermal characteristics of surfaces are enhanced and radiant heat conduction diminished by an interior radiation control coating or low-emittance paint.

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 today's more environmentally-aware social climate, reducing heat loss and the resultant energy savings are a double blessing. Diminishing energy resources and ever-increasing fuel costs make any possible savings very desirable. High conductivity materials need to be treated to cut 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.

The worst culprits for heat transference - gains and losses - in man-made constructions are radiant heat waves. The best value-for-money answer to this situation can be reflective insulation. Lighting requirements are also reduced by up to 40% by radiant barriers.

RIMs (Reflective Insulation Materials) are a good alternative to old-fashioned bulk insulation materials such as fibreglass or loose-fill cellulose. RIS (Reflective Insulation Systems) have measurable thermal resistances (R-values). These measurements prove the effectiveness of reflective insulation in minimizing heat loss in walls, ceilings, sub-floor spaces and air-ducts.

The combined technical documentation of almost 100 years of research demonstrates reflective technology's facility to trim down the burden of energy costs in up to date buildings. One fundamental component in lessening energy expenditure can come in the form of low-emittance surfaces. Appropriate fitting by competent specialists applying manufacturers' directives and published criterion is imperative to realize the requisite R-values. This also applies to reaching the specifications of the crucial ratings for water vapor resistance and values of thermal resistance.

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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