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Asbestos insulating board (AIB), also known by the trade names Asbestolux and Turnabestos, is an asbestos-containing board formerly used in construction for its fire resistance and insulating properties. [1] These boards were commonly used in the United Kingdom from the 1950s until production ended in 1980.
Asbestos (/ æ s ˈ b ɛ s t ə s, æ z-,-t ɒ s / ass-BES-təs, az-, -toss) [1] is a group of naturally occurring, toxic, carcinogenic and fibrous silicate minerals.There are six types, all of which are composed of long and thin fibrous crystals, each fibre (particulate with length substantially greater than width) [2] being composed of many microscopic "fibrils" that can be released into ...
Many residential and commercial buildings contain asbestos, used in spray-applied flame retardant, thermal system insulation, and in a variety of other materials. [2] Asbestos can be flocked above false ceilings, inside technical ducts, and in many other small spaces where firefighters would have difficulty gaining access.
In time it became a generic term for other companies' similar asbestos-cement products, and later an even more generic term for a hard, fireproof composite material, fibre cement boards, typically used in wall construction. It can also be found in insulation, siding, roof gutters, and cement wallboard. The more prevalent transite found in wall ...
Flat sheets for house walls and ceilings were usually 6 and 4.5 mm (0.24 and 0.18 in) thick, 900 and 1,200 mm (35 and 47 in) wide, and from 1,800 to 3,000 mm (71 to 118 in) long. Battens 50 mm (2.0 in) wide × 8 mm (0.31 in) thick, used to cover the joints in fibro sheets. "Super Six" corrugated roof sheeting and fencing.
The Life Safety Code (NFPA 101) [5] and Section 803.1 of the International Building Code limit finishes for interior walls and ceilings to materials in three classes (A, B, or C, with A being the lowest flame spread and C being the highest) and gives greater restrictions for certain rooms:
Weight may cause ceilings to sag if the material is very heavy. Professional installers know how to avoid this, and typical sheet rock is fine when dense-packed. Will settle over time, losing some of its effectiveness. Unscrupulous contractors may "fluff" insulation using fewer bags than optimal for a desired R-value.
Exemptions would be granted under strict control. The regulations did not prohibit the continued use of asbestos-containing materials that were already in place such as asbestos-cement roof sheets or ceilings, the department was satisfied that there was "no undue risk" and they would be replaced in due time.