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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 ...
Loose-fill insulation comes in loose fibers or pellets and should be blown into a space. Rigid foam is more expensive than fiber, but generally has a higher R-value per unit of thickness. Foam-in-place insulation can be blown into small areas to control air leaks, like those around windows, or can be used to insulate an entire house. [33]
Window insulation reduces heat transfer from one side of a window to the other. The U-value is used to refer to the amount of heat that can pass through a window, called thermal transmittance, with a lower score being better. [1] The U-factor of a window can often be found on the rating label of the window.
The first expanded polystyrene ICF Wall forms were developed in the late 1960s with the expiration of the original patent and the advent of modern foam plastics by BASF. [citation needed] Canadian contractor Werner Gregori filed the first patent for a foam concrete form in 1966 with a block "measuring 16 inches high by 48 inches long with a tongue-and-groove interlock, metal ties, and a waffle ...
A vacuum insulated panel (VIP) is a form of thermal insulation consisting of a gas-tight enclosure surrounding a rigid core, from which the air has been evacuated. It is used in building construction, refrigeration units, and insulated shipping containers to provide better insulation performance than conventional insulation materials. [1] [2]
Unlike outdoor pressure washers with application pressures of 1,000 – 5,000 pounds per square inch (34,000 kPa), spray-and-vac units are designed for long-term indoor use on grout and other surfaces, and offer variable application pressures ranging from 110–500 pounds per square inch (760–3,450 kPa). [citation needed]
Windex is an American brand of glass and hard-surface cleaners [1] —originally in glass containers, later in plastic ones. The name "Windex" (from "window" + "-ex") is a registered trademark. Drackett sold the Windex brand to Bristol-Meyers in 1965. [2] S. C. Johnson acquired it in 1993 and has been manufacturing it since. [3] The original ...
Window cleaner climbing out of a scaffold in Shanghai. Risks include slipping on water or soap, and falling from heights. In 1932 in New York, an average of one out of every two hundred window cleaners were killed per year. [3] On May 29, 1962, four window cleaners were killed when a scaffold fell at the Equitable Life Building.
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