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  Urea formaldehyde foam insulation was invented in Germany in 1933 and has been used in Europe since the 1950s. It was introduced to North America in the 1970s but after a few years of use, was banned in Canada in 1980 and in the United States in 1981. UFFI was a low-density foam prepared… Continue reading Urea Formaldehyde Foam Insulation – UFFI

Windows and doors are typically responsible for about 40 per cent of your home's heating bill. Thermal windows are typically two to four times more efficient than older single pane windows. That means you can expect your winter heating bills to drop on average about 20 percent to 30 percent. Thermal glass is comprised of… Continue reading 保温玻璃窗修复