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Lengths up to 16 feet (4.9 m) are common; the most common is 8 feet (2.4 m). Common thicknesses are 1 ⁄ 2 and 5 ⁄ 8 inch (13 and 16 mm); thicknesses of 1 ⁄ 4, 3 ⁄ 8, 3 ⁄ 4, and 1 inch (6, 10, 19, and 25 mm) are used in specific applications. In many parts of Canada, drywall is commonly referred to as Gyproc.
Closed-cell foams are superior insulators. While open-cell foams typically have R-values of 3 to 4 per inch (RSI-0.53 to RSI-0.70 per inch), closed-cell foams can attain R-values of 5 to 8 per inch (RSI-0.88 to RSI-1.41 per inch). This is important if space is limited, because it allows a thinner layer of insulation to be used.
A scrim will appear nearly transparent if a scene behind it is lit, but there is no light on the scrim. A dreamy or foggy look can be achieved by lighting a scene entirely behind a scrim. If a light with a gobo is aimed at a scrim, the image will appear on the scrim, but also any objects behind the scrim will be lit by the pattern as well. [1]
A multi-family residential building under construction with rigid panel exterior insulating sheathing. Rigid panel insulation, also referred to as continuous insulation, [1] can be made from foam plastics such as polyurethane (PUR), polyisocyanurate (PIR), and polystyrene, or from fibrous materials such as fiberglass, rock and slag wool.
Therefore, it is commonly used in liquefied gas tanks (e.g. LNG, LN 2, LH 2, LO 2), cryostats, cryogenic pipelines and superconducting devices. Additionally it is valued for its compact size and weight. A blanket composed of 40 layers of MLI has thickness of about 20 mm (0.79 in) [8] and weight of approximately 12 kg/m 2 (2.5 lb/sq ft). [9]
Scrim and sarking is a method of interior construction widely used in Australia and New Zealand in the late 19th and early 20th centuries. In this method, wooden panels were nailed over the beams and joists of a house frame, and a heavy, loosely woven cloth, called scrim , was then stapled or tacked over the wood panels.
Spray polyurethane foam comes in a range of densities and cell structure. Low density foams are referred to as open cell SPF while higher density foams are referred to as closed cell foam. 1.8-2 pound polyurethane foam has the highest R-value of readily available spray foam insulation used in homes and buildings. [5]
One common set of units is g/m 2 ·day or g/100in 2 ·day. Permeability can be reported in perms, a measure of the rate of transfer of water vapor through a material (1.0 US perm = 1.0 grain/square-foot·hour·inch of mercury ≈ 57 SI perm = 57 ng/s·m 2 ·Pa). American building codes started classifying vapor retarders in the 2007 IRC supplement.
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