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ENVIRONMENTAL HAZARDS - INSPECT, TEST, REMEDY
ACOUSTICAL SEALANT CHOICES
AGE of a BUILDING - how to determine
AIR BYPASS LEAKS
AIR LEAK DETECTION TOOLS
AIR LEAK MINIMIZATION
AIR LEAK SEALING PROCEDURE
AIR POLLUTANTS, COMMON INDOOR
ALLERGENS in BUILDINGS, RECOGNIZING
ANIMAL ALLERGENS / PET DANDER
APPLIANCE EFFICIENCY RATINGS
ARCHITECTURE & BUILDING COMPONENT ID
ASBESTOS CEILING TILES, Asbestos-Containing
ASBESTOS CEMENT ROOFING
ASBESTOS CEMENT SIDING
ASBESTOS DUCTS, HVAC
ASBESTOS-FREE INSULATION MATERIALS
ASBESTOS IDENTIFICATION IN buildings
ASBESTOS FLOORING HAZARD REDUCTION
ASBESTOS FLOORING REMOVAL GUIDE
ASBESTOS LIST of PRODUCTS
ASBESTOS MATERIAL REGULATIONS
ASBESTOS MATERIAL REGULATIONS Update
ASBESTOS MATERIAL REGULATIONS, OSHA
ASBESTOS PHOTO GUIDE to Materials
ASBESTOS REMOVAL, Amateur, Incomplete
Asbestos Removal, Certification
ASBESTOS REMOVAL, Wetting Guidelines
ASBESTOS RISK ASSESSMENT
Asbestos Under the Microscope
ATTIC LEAKS, CONDENSATION & MOLD
BASEMENT HEAT LOSS
BUCKLED FOUNDATIONS due to INSULATION?
BUILDING NOISE DIAGNOSIS & CURE
CATHEDRAL CEILING INSULATION
CEILING FINISHES INTERIOR
CEILINGS, DROP or SUSPENDED PANEL
CEILINGS, PLASTER TYPES
CERAMIC TILE FLOOR, WALL
CERAMIC TILE, ASBESTOS in?
CHIMNEY INSPECTION DIAGNOSIS & REPAIR
CHINESE DRYWALL HAZARDS
DEW POINT CALCULATION for WALLS
EFFLORESCENCE, Salts & White / Brown Deposits
FIBERGLASS INSULATION MOLD
FLOOR TILE HISTORY & INGREDIENTS
FLOOR TILES ASBESTOS
FLOOR TYPES & DEFECTS
HEAT LOSS in BUILDINGS
HOUSE DOCTOR, how-to be
HUMIDITY LEVEL TARGET
ICE DAM PREVENTION
INDOOR AIR QUALITY IMPROVEMENT GUIDE
INSULATION FACT SHEET- DOE
INSULATION IDENTIFICATION GUIDE
INSULATION R-Values & Properties
METAL LATH, PLASTER & STUCCO
METHANE GAS SOURCES
MOISTURE CONTROL in BUILDINGS
MOLD: A COMPLETE GUIDE TO MOLD
Museum Artifact Preservation
NOISE / SOUND DIAGNOSIS & CURE
ODORS & SMELLS DIAGNOSIS & CURE
PAINT FALURE, DIAGNOSIS, CURE, PREVENTION
PLASTER & BEAVERBOARD & DRYWALL
PLASTER BULGES & PILLOWS
PLASTER LATH, METAL
PLASTER, LOOSE FALL HAZARDS
PLASTER TYPE IDENTIFICATION
PLASTER VENEER Best Practices
ROOF VENTILATION SPECIFICATIONS
SAFETY HAZARDS & INSPECTIONS
SEARS KIT HOUSES
SOUND CONTROL in buildings
Splits in Structural Wood Beams
STAIN DIAGNOSIS on BUILDING EXTERIORS
STAIN DIAGNOSIS on BUILDING INTERIORS
STUCCO WALL METHODS & INSTALLATION
STRUCTURAL DAMAGE PROBING
SWEATING (CONDENSATION) on PIPES, TANKS
Thermal Expansion Cracking of Brick
THERMAL EXPANSION of MATERIALS
THERMAL IMAGING, THERMOGRAPHY
THERMAL MASS in BUILDINGS
THERMAL TRACKING Indicates Heat Loss
VAPOR BARRIERS & CONDENSATION in BUILDINGS
VENTILATION in BUILDINGS
VINYL CHLORIDE HEALTH INFO
Volatile Organic Compounds VOCs
WALL CONSTRUCTION BARRIER vs CAVITY
WATER ENTRY in buildings
WINDOWS & DOORS
WINTERIZE A BUILDING
WOOD Burning Heaters Fireplaces Stoves
World Trade Center Collapse Dust Photos
Asbestos-containing building fireproofing materials & coatings: this article describes common asbestos fireproofing materials used in buildings on ceilings and walls. We have not prepared but will add description of spray-on fiberglass coatings used on steel columns and ceilings in high rise buildings such as the lower floors of the NY World Trade center. This document assists building buyers, owners or inspectors who need to identify asbestos materials (or probable-asbestos) in buildings by simple visual inspection. 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.
Green links show where you are. © Copyright 2013 InspectAPedia.com, All Rights Reserved. Author Daniel Friedman.
Asbestos Fireproofing- Tremolite Asbestos-containing Spray-on or Slab (Tremolite) Fireproofing 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.
Also see ASBESTOS DUCTS, HVAC a field identification guide to visual detection of asbestos in and on heating and cooling system ducts and flue vents. Also see ASBESTOS FIREPROOFING SPRAY-On Coatings. Also see Micro-Photographs of Dust from the World Trade Center collapse following the 9/11/01 attack. Links to U.S. government and other authoritative research and advice are included.
Asbestos based building fireproofing materials including both the thick Tremolite asbestos panels below, chrysotile asbestos panels and asbestos-containing paints and coatings for fire resistance, are described here. Also see ASBESTOS FIREPROOFING SPRAY-On Coatings.
Slabs of 1" thick asbestos insulating board, typically 6" wide, were used as fireproofing on commercial building ceilings and possibly walls.
According to some experts, this material is usually Tremolite asbestos, a particularly hazardous form of asbestos which occurs as both fibrous asbestiform (see 1st lab micro photograph) and non-fibrous granular form which in our samples includes high percentage of ultra-small sub-micron asbestos particulates (see 2nd lab micro photograph).
This material when viewed overhead from below, can appear to be simple concrete.
But a closer look shows its fibrous nature, and inclusions which do not resemble concrete. Unlike cementious asbestos board, this material is soft, very friable, and easily damaged or disturbed. [This tremolite insulation was removed from the building by experienced professional asbestos abatement workers. It should not be handled by amateurs.]
Microphotographs taken in our forensic laboratory show what this particular asbestos material looks like under high magnification and polarized light. See Asbestos Under the Microscope.
Not commonly used in single family residences or small buildings, but common in high-rise buildings into the 1970's, including the lower floors of the World Trade Center, leading to asbestos fiber release at "ground zero" on 9/11/00. At some locations where this material was sprayed on the under-side of steel roofing and on steel columns, it may be hidden by finish materials and enclosures.
Frequently Asked Questions (FAQs)
Questions & answers or comments about asbestos content in building fire proofing materials, including spray-on fireproofing & solid block or sheet fireproofing materials.
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Technical Reviewers & References
Related Topics, found near the top of this page suggest articles closely related to this one.