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ROOFING INSPECTION & REPAIR
AMERICAN CEMWOOD ROOFING
BEST ROOFING PRACTICES
BUILT UP ROOFS
CATHEDRAL CEILING VENTILATION
CERTIFICATIONS for ROOFING CONTRACTORS
CHIMNEY FLASHING Mistakes & Leaks
COLD WEATHER ROOF TROUBLE
DECKS, ROOFTOP CONSTRUCTION
EPDM, RUBBER, PVC ROOFING
EXTRACTIVE BLEEDING on SHINGLES
FIRE RETARDANT PLYWOOD
FLASHING on BUILDINGS
FLAT ROOF MOISTURE & CONDENSATION
Green House or Solarium Roof Leaks
HEAT TAPES & CABLES on Roofs for Ice Dams
ICE DAM PREVENTION
MASONITE WOODRUF FIBERBOARD ROOFING
NOISE CONTROL for ROOFS
PLASTIC ROOFING TYPES
PVC, EPDM, RUBBER ROOFING
ROOF ARCHITECTURAL STYLES - PHOTO GUIDE
ROOF CLEANING RECOMMENDATIONS
ROOF COLOR RECOMMENDATIONS
ROOF INSPECTION SAFETY & LIMITS
ROOF LEAK DIAGNOSIS & REPAIR
ROOF NOISE TRANSMISSION
ROOF REPLACEMENT SNAFUs
ROOFING FELT UNDERLAYMENT REQUIREMENTS
ROOFING MATERIALS, Age, Types
SADDLE CONSTRUCTION at CHIMNEYS
SNOW GUARDS & SNOW BRAKES
STANDARDS for ROOFING
STRESS SKIN INSULATED PANELS
TEST LABS - ROOF SHINGLE
TREES & SHRUBS, TRIM OFF BUILDING
TRUSSES, Floor & Roof
UNDERLAYMENT REQUIREMENTS on ROOFS
VENTILATION in BUILDINGS
WALK-ON ROOF SURFACES
WARRANTIES for ROOF SHINGLES
WORKMANSHIP & ROOF DAMAGE
Cemwood roofing failures & warranty information: this website provides information about American Cemwood fiber cement roofing shingles, shakes, and roof failures, including roofing claims information for Permatek, Permatek II, Royal, Cemwood, and Cascade shakes, and Pacific Slate and Trieste tiles or roof "shingles" and includes advice for home inspectors, home buyers, and homeowners where these roofing products are used.
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Newer formulations of fiber cement roofing tiles introduced in the 1980s and 1990s used wood fibers instead of asbestos and were marketed widely in the western United States as a fire-resistant alternative to wood shakes. Made from a mixture of Portland cement and wood fibers, they weighed 400 to 600 pounds per square and were designed to imitate slates or wood shakes.
They promised excellent resistance to insects, fungus, fire, and weathering and carried warranties ranging from 25 to 50 years. Within five years of installation, however, many of the fiber-cement shakes began to deteriorate. Problems included surface crazing, cracking, delamination, and softening and resulted in a number of lawsuits against key manufacturers and several companies abandoning the product.
The problems and failiures in wood fiber cement roofing products were generally linked to high water absorption, which created an alkaline solution that was corrosive to the wood fibers. Some fiber cement roofing products have fared better than others. In general, fiber cement roof products that are steam-cured in an autoclave will have lower water absorption, but they tend to be more brittle.
Comparing Asbestos Cement Roof Shingles to American Cemwood Shingles
Our photo (left) is of asbestos cement roofing shingles, a product that can usually be easily distinguished from American Cemwood roofing shakes and other members of that product family. We provide further Cemwood roofing identification information below.
For information about fiber cement roofing inspection, diagnosis, repair, and repalcement, see ASBESTOS CEMENT ROOFING. Also see MASONITE WOODRUF FIBERBOARD ROOFING and for similar building siding products see SIDING HARDBOARD for hardboard siding product failures and warranty claims.
American Cemwood Roofing Claims Contact Information
The following information was provided by the American Cemwood Claims Administrator. Independent Claims Administrator for American Cemwood Roofing Litigation Settlement, P.O. Box 162, Lancaster, CA 93584. Contact the Cemwood Administrator at 1-800-708-3266.
Quoting from original source (that includes product photos): http://www.cemwoodclaims.com/identify.html
How to Identify American Cemwood Roofing Shakes, Permatek Shakes, and related products:
Watch out: when inspecting a Cemwood any other roof, be careful about walking on cemwood roofs or any other roof surface that is fragile, as you are likely to damage the roof and may convert a roof of uncertain future life to a need for an immediate re-roof job. Stay off of roofs that are fragile, wet, slippery, moss covered, steep, or have any other safety concern that leaves you uncertain about your abiltiy to make a safe on-roof inspection.
List of Fiberboard & Fiber Cement Roof Shingle Warranty Claims Companies & Websites
George Podrug provided Masonite Woodruf™ roofing information for home inspectors in 1999.
Defective Hardboard Siding (similar products): see these detailed articles:
Frequently Asked Questions (FAQs) about Cemwood roof shake roof failiures, class action, settlement, warranty, replacement.
Questions & answers or comments about American Cemwood Roof shake class action settlement, product identification, failures, & repair advice.
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Technical Reviewers & References
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