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ASBESTOS in BUILDINGS ROOFING INSPECTION & REPAIR CERTIFICATIONS for ROOFING CONTRACTORS Questions and Answers about GAF Master Elite Anecdote of a "Bad" Roofing Contractor The GAF Master EliteTM roofing program How to Get the Best Roofing Job CHOOSING A ROOFING CONTRACTOR STEP 1: FINDING A ROOFER STEP 2: CHOOSING A ROOFING CONTRACTOR STEP 3: CHOOSING ROOF MATERIAL STEP 4: NEGOTIATE ROOFING CONTRACT STEP 5: LETTING THE ROOFER ROOF ASBESTOS CEMENT ROOFING Asphalt-asbestos Roofing Materials Cement-asbestos roof shingles Environmental Issues - Asbestos Shingles Wear Signs on Cement Asbestos Shingles Maintenance Tips for Asbestos Cement Shingles Replacements for Asbestos Cement Shingles Corrugated Cement-Asbestos Roofing Asphalt-asbestos Paints & sealants OSHA Regulation Asbestos Roofing ASBESTOS REGULATION Update ASPHALT ROOF SHINGLES ASPHALT SHINGLE DEFINITIONS ASPHALT SHINGLE FAILURE TYPES ALGAE, FUNGUS, LICHENS, MOSS on SHINGLES BLISTERS on ASPHALT SHINGLES CRACKS in FIBERGLASS SHINGLES CUPPING ASPHALT SHINGLES CURLING ASPHALT SHINGLES FISHMOUTHING ASPHALT SHINGLES GRANULE LOSS from SHINGLES HAIL DAMAGED SHINGLES LADDERING & STAIR STEPPING SHINGLES LIFE / WEAR FACTORS in SHINGLES MOSS & LICHENS on SHINGLES ORGANIC FELT SHINGLE DEFECTS SPLICE DEFECTS on ASPHALT SHINGLES STAINS on ROOF SHINGLES CHIMNEY INSPECTION & REPAIRS FIRE RETARDANT PLYWOOD ROOF INSPECTION SAFETY & LIMITS SLATE ROOF INSPECTION & REPAIR SLATE ROOF DURABILITY SLATE ROOF REPAIRS SLATE ROOF SOURCES SLATE ROOF TYPES SLATE ROOF PHOTO LIBRARY SLATE ROOF INSPECTIONS SLATE ROOF INSPECTION CLASS STANDARDS for ROOFING WARRANTIES for ROOF SHINGLES CLASS ACTION SHINGLE LAWSUITS REPORTING SHINGLE FAILURES ROOF FAILURE REPORT FORM WORKMANSHIP & WIND DAMAGE More Information Air Conditioning Bookstore Electrical Environment Exteriors Heating Home Inspection Insulate Ventilate Interiors Mold Inspect/Test Plumbing Water Septic Roofing Structure Accuracy & Privacy Policies Contact Us |
Here is our photo guide and text that can help in identification of asbestos-containing roofing products like asphalt shingles & asbestos-cement roof shingles. This document assists building buyers, owners or inspectors who need to identify asbestos materials (or probable-asbestos) in buildings by simple visual inspection. In the website sections listed below, we provide photographs and descriptive text of asbestos insulation and other asbestos-containing products to permit identification of definite, probable, or possible asbestos materials in buildings. While an expert lab test using polarized light microscopy may be needed to identify the specific type of asbestos fiber, or to identify the presence of asbestos in air or dust samples, many asbestos-containing building products not only are obvious and easy to recognize, but since there were not other look-alike products that were not asbestos, a visual identification of this material can be virtually a certainty in many cases. © Copyright 2009 Daniel Friedman, All Rights Reserved. Information Accuracy & Bias Pledge is at below-left. Use links at the left of each page to navigate this document or to view other topics at this website. Green links show where you are in our document or website. Photo guide to asbestos containing roofing productsMost roofing materials are considered to be non-friable, and are probably less hazardous than other friable asbestos products such as asbestos pipe insulation. However removal of asbestos-containing roofing products is regulated as we discuss below. Guide to Asphalt-asbestos Roof Shingles, Roll Roofing & Roofing Mastics & CoatingsAlso see our asphalt roofing materials articles at ASPHALT ROOF SHINGLES and at ROOFING INSPECTION & REPAIR Guide to Cement-asbestos roof shingles
The typical life expectancy of an cement asbestos shingle roof was given as 30 years, but we've seen these roofs that were now 50 years old in good condition. Typical roof wear or failure patterns are either failure of the shingle fasteners or broken and falling shingles. Asbestos cement corrugated roofing has been in use over the same time period and was generally a thicker material used in low-cost applications such as on sheds, barns, and low-income housing in some areas. Roofing materials that use fibers and aggregate other than asbestos are properly called "fiber cement" roofing products. Some manufacturers use the term "fiber-reinforced cement" for these products. All of these products use some sort of fiber along with cement. Before 1978 in the U.S. the common fiber used was asbestos. Cement asbestos shingles (or asbestos cement roofing shingles) have a medium in-place cost and durability compared with other roofing products and a a fire rating of Class A or B. Also see Corrugated Cement-Asbestos Roofing. Environmental Issues With Cement Asbestos Roof ShinglesThe asbestos in cement asbestos roofing products is not friable under normal conditions. That is, it is not normally easily crushed into dust by hand. However very work asbestos cement shingles, or shingles that are mishandled during demolition (breaking into many small pieces, running power saws to cut the material) risks creating airborne asbestos-contaminated dust which could be a health and environmental hazard. Also in some communities special measures and added costs are involved because of a requirement for air-testing during removal and possibly costs to dispose of the material in an appropriate landfill. (After all, originally this material came from the land.) Asphalt-asbestos paints and sealantsAsbestos-filled asphalt paint was used damp proofing on building foundations and as a roofing sealant for many decades up to 1978 Also see our articles at ROOFING INSPECTION & REPAIR OSHA Regulation of roof demolition where asbestos containing roofing materials ACRM are presentBeginning in 1986 OSHA set a permissible exposure limit (PEL) of 0.2 fibers per cubic centimeter (f/cc) of air over an 8-hour time-weighted average exposure period. OSHA also set an action level of 0.1 f/cc of asbestos for an 8-hour TWA average, and (the highest permitted short term asbestos fiber exposure) 1.0 f/cc "excursion limit" for a 30-minute time period. According to NRCA, the National Roofing Contractors' Association, their studies up to February 1992 had not found a single roofing job at which these limits were exceeded, and NRCA reported that in some cases no fiber release was detected. We note that the association would have been referring only to asphalt-based roofing materials, not jobs involving the demolition of other ACRM such as cement-asbestos roof shingles (or "asbestos roof tiles" as some consumers refer to them) which might produce different statistics. ... Technical Reviewers & References
Use links just below or at the left of each page to navigate this document or to view other topics at this website. Green links show where you are in our document or website.
ASBESTOS IDENTIFICATION IN BUILDINGS
Use links just below or at the left of each page to navigate this document or to view other topics at this website. Green links show where you are in our document or website.
ASBESTOS IDENTIFICATION IN BUILDINGS | ||||||
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IDENTIFICATION of ASBESTOS in BUILDINGS More Information InspectAPedia Blog - News Updates Air Conditioning & Heat Pumps Bookstore Electrical Environment Exteriors Heating Home Inspection Insulate Ventilate Interiors Mold Inspect/Test Plumbing Water Septic Roofing Structure Accuracy & Privacy Policies Contact Us |
More Information on Building Diagnostic Inspections and Repairs
For more information about fiberglass as an indoor air quality concern see:
For more information about asbestos as an indoor air quality concern with focus on easy ways to identify asbestos materials in buildings, see:
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03/03/2009 - 06/01/1993 - InspectApedia.com/sickhouse/asbestoslookG.htm - © 2009 - 1988 Copyright Daniel Friedman All Rights Reserved - InspectAPedia® is a Registered U.S. Trademark