![]() Cellulose can also be blown dry into netting stapled over building cavities. ![]() Damp-sprayed cellulose is typically ready for wall covering within 24 hours of installation. When damp sprayed, a small amount of moisture is added at the spray nozzle tip, activating natural starches in the product, and causing it to adhere inside the cavity. In new construction, cellulose can be either damp-sprayed or installed dry behind netting. When installation is complete, the holes are sealed with a plug and the siding is replaced and touched up if necessary to match the wall. In existing structures, installers remove a strip of exterior siding, usually about waist high drill a row of three-inch holes, one into each stud bay, through the wall sheathing insert a special filler tube to the top of the wall cavity and blow the insulation into the building cavity, typically to a density of 1.5 to 3.5 lb. Cellulose insulation, when installed at proper densities, cannot settle in a building cavity.Ĭellulose insulation is used in both new and existing homes, as loose-fill in open attic installations and dense packed in building cavities such as walls and cathedral ceilings. Manufacturers add the mineral borate, sometimes blended with the less costly ammonium sulfate, to ensure fire and insect resistance. The paper is first reduced to small pieces and then fiberized, creating a product that packs tightly into building cavities. The newer BIBS HP is an economical hybrid system that combines BIBS with spray polyurethane foam.Ĭellulose insulation is made from recycled paper products, primarily newsprint, and has a very high recycled material content, generally 82% to 85%. BIBS is blown in dry, and tests have shown that walls insulated with a BIBS system are significantly better filled than those insulated using other forms of fiberglass insulation such as batts because of the effective coverage obtained by this method of application. One variation of fiberglass loose-fill insulation is the Blow-In-Blanket System® (BIBS). Loose-fill insulation must be applied using an insulation-blowing machine in either open-blow applications (such as attic spaces) or closed-cavity applications (such as those found inside existing walls or covered attic floors). Most manufacturers use up tp 40% to 60% recycled glass content. R-38 batts for 12-inch (304-mm) spaces are also available.įiberglass insulation is made from molten glass that is spun or blown into fibers. High-density batts for a 2 by 6-inch (51 by 152 mm) frame wall offer R-21, and high-density batts for an 8.5-inch (216-mm) spaces yield about an R-30 value. A medium-density batt offers R-13 for the same thickness. ![]() High-density fiberglass batts for a 2 by 4-inch (51 by 102 millimeter ) stud-framed wall has an R-15 value, compared to R-11 for "low density" types. The denser products are intended for insulating areas with limited cavity space, such as cathedral ceilings. ![]() Manufacturers now produce medium- and high-density fiberglass batt insulation products that have slightly higher R-values than the standard batts. It's commonly used in many different forms of insulation: blanket (batts and rolls), loose-fill, and is also available as rigid boards and duct insulation. U value options to suit project requirement, from 1.9W/m²K down to 0.Fiberglass consists of extremely fine glass fibers and is one of the most ubiquitous insulation materials. Profiles to match any composite roof panel Range of GRP sheet component products available Trilite GRP and Safelight - with varying performance options With a long-life expectancy of 25+ years, they offer outstanding value. Energysaver FAIRs have unique features as standard offering quick, simple and reliable installation. Delivering U-values from 1.9W/m²K down to 0.9W/m²K, thermally insulating Energysaver FAIRs help a building achieve compliance with Part L of the Building Regulations. They offer the best quality diffused natural daylight, thermal performance and ready-to-fit convenience for wide-span buildings. Energysaver composite panel rooflights are innovative triple skin factory assembled insulating rooflights (FAIRs) for composite roofs, manufactured from GRP.
0 Comments
Leave a Reply. |