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Demand for insulation increased following the oil embargo of 1973–74, which caused energy costs for heating to skyrocket across the United States, driving interest in energy conservation. Insulation gained significant national attention in the U.S. as a cheap and available technology to increase the energy efficiency of homes. In 1977 ...
One remarkable finding: with the current, inefficient heating plant and standard insulation and double-pane windows operating costs for 30 years would be around $220,000; with expanded-foam insulation, low-e windows, and super-high-efficiency heating equipment the cost would be $75,000.
At a time when most Canadian houses had 4-inch-thick (100 mm) walls with an insulation R-value of r-8, the Saskatchewan Conservation House had 12-inch-thick (300 mm) walls with r-40 insulation and a roof with r-60 insulation, [15] increasing the house's insulation to approximately six times compared to the standard.
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Since the bulk of the vegetation stays dry and is densely packed—trapping air—thatching also functions as insulation. It is a very old roofing method and has been used in both tropical and temperate climates. Thatch is still employed by builders in developing countries, usually with low-cost local vegetation.
Spray foam insulation or spray polyurethane foam (SPF) is an alternative to traditional building insulation such as fiberglass. A two-component mixture composed of isocyanate and polyol resin comes together at the tip of a gun, and forms an expanding foam that is sprayed onto roof tiles, concrete slabs, into wall cavities, or through holes ...
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