Asbestos Shingles: A Homeowner's Identification and Removal Guide

Asbestos shingles are rigid roofing and siding panels made with asbestos fiber in cement. EPA lists roofing and siding shingles among the home materials where asbestos may be found. To identify one you need a lab test: under 40 CFR 61.141, material above one percent asbestos is ACM, measured by polarized light microscopy.

The regulatory category matters more than anything else here, and most homeowner sources get it backwards. The EPA interpretive rule on roof removal is Appendix A to 40 CFR part 61 subpart M. It names asbestos-cement shingles as an example of Category II nonfriable ACM. Asphalt roofing products go in Category I instead. Per that same rule, Category II material is more likely to become friable when damaged than Category I.

Condition, not age, drives the decision. Per EPA, material that has not been damaged or disturbed is not likely to pose a health risk. EPA says anything in good condition that will not be disturbed should be left alone. The same EPA guidance names sawing, sanding, drilling, scraping, cutting, and improper removal as things that release fibers.

This guide covers what the federal record supports: how EPA classifies these shingles, why sight identification fails, what professional testing involves, and what NESHAP and OSHA require once a roof comes off. It also covers how to assess a contractor. Each figure below names the federal source that carries it.

What Are Asbestos Shingles and When Were They Made?

An asbestos shingle is a cement product reinforced with asbestos fiber. EPA groups asbestos cement products with roofing shingles, ceiling and floor tiles, and paper products. Those are the building materials EPA lists as having used asbestos for fiber strength and heat resistance. The fiber acted as a reinforcing agent, which is why the finished panel is hard rather than fluffy. Under 40 CFR 61.141 it is nonfriable: when dry it cannot be crumbled, pulverized, or reduced to powder by hand pressure.

Federal regulation of airborne asbestos long predates the roofs still in service. EPA identified asbestos as a hazardous air pollutant on March 31, 1971. EPA promulgated the asbestos NESHAP on April 6, 1973, now codified at 40 CFR part 61 subpart M. The rule has been amended several times, most heavily in November 1990.

The EPA 1989 ban is the most misquoted fact about these products. EPA describes that rule under the Toxic Substances Control Act as a partial ban. Most of it was overturned in 1991 by the Fifth Circuit Court of Appeals, EPA notes. What survived is a prohibition on new uses begun after August 25, 1989, plus five named product types. Those five are corrugated paper, rollboard, commercial paper, specialty paper, and flooring felt. Cement shingles appear on none of those EPA lists.

Two other federal actions matter more to a homeowner today. The Asbestos Hazard Emergency Response Act of 1986 was enacted as Title II of the Toxic Substances Control Act. AHERA required EPA to write the schools rule. It also required EPA to develop the model plan states use to accredit asbestos inspectors and contractors. In March 2024, EPA finalized a risk management rule prohibiting ongoing uses of chrysotile, which EPA calls the only form still imported into the United States.

How to Identify Asbestos Roof Shingles vs Modern Materials

EPA is blunt about visual identification, and the wording is worth quoting. Generally you cannot tell whether a material contains asbestos simply by looking at it, EPA says, unless it is labeled. If in doubt, per EPA, treat the material as if it contains asbestos and leave it alone. That is why this section describes what an accredited professional establishes rather than offering a driveway checklist.

What can be settled without disturbing anything is which category the material would fall into. Appendix A to 40 CFR part 61 subpart M puts asphalt roofing products in Category I. It puts asbestos-cement shingles, asbestos-cement tiles, and transite board in Category II. EPA draws that line on potential to release fibers when damaged, not on appearance.

The same split runs through the OSHA standard. Under 29 CFR 1926.1101, removing roofing and siding shingles is Class II asbestos work. OSHA defines Class II as removal of material that is not thermal system insulation or surfacing material. OSHA separately presumes thermal system insulation and surfacing material to contain asbestos in buildings built no later than 1980. That presumption reaches pipe lagging and sprayed-on surfacing rather than roofing.

Vermiculite in the attic below a suspect roof is a separate question with its own EPA guidance. A mine near Libby, Montana was the source of over 70 percent of all vermiculite sold in the United States from 1919 to 1990, per EPA. EPA states the Libby vermiculite was contaminated with asbestos and was often sold as Zonolite. The EPA instruction is to assume it contains asbestos, not to disturb it, and to use a trained professional if it has to come out. A licensed asbestos inspection firm can address both in one visit, and the asbestos siding guide covers the wall-mounted version.

Are Asbestos Cement Shingles Dangerous If Left Alone?

EPA is consistent on undisturbed material across its homeowner guidance. EPA says anything in good condition that will not be disturbed should be left alone. Undamaged, undisturbed material is not likely to pose a health risk, per EPA. EPA also advises keeping an eye on it and checking over time for wear or damage.

Disturbance changes the picture, and EPA names the disturbances directly. Per EPA, these materials may release fibers when disturbed, damaged, removed improperly, repaired, cut, torn, sanded, sawed, drilled, or scraped. The EPA homeowner do's and don'ts add two instructions. Avoid sawing, sanding, scraping, or drilling holes in suspect material, and take every precaution against damaging it.

Damage also pulls the material into the regulated tier. Under 40 CFR 61.141, regulated ACM includes Category II nonfriable material that has already become crumbled, pulverized, or reduced to powder. It also covers Category II material with a high probability of becoming so under the forces expected during demolition or renovation. A weathered roof under a crew's weight is exactly the case that NESHAP definition describes. The friable vs nonfriable asbestos explainer covers the threshold.

The health endpoints are not in dispute in the federal record. EPA names lung cancer, mesothelioma, and asbestosis as three major health effects associated with asbestos exposure. The NIOSH Pocket Guide to Chemical Hazards lists asbestos as a potential occupational carcinogen. NIOSH gives the respiratory system and the eyes as target organs.

Testing Suspect Asbestos Shingles for Confirmation

Confirmation is a laboratory question, not a field one. At 40 CFR 61.141, ACM is material containing more than one percent asbestos. The method is named in the rule: appendix E, subpart E, 40 CFR part 763, section 1, Polarized Light Microscopy. That same EPA roof removal rule applies the same method and threshold to roofing.

EPA is explicit about who should collect the sample. A trained and accredited professional should take samples for analysis, EPA says, because a professional knows what to look for. EPA adds that there may be an increased health risk if fibers are released. Done incorrectly, EPA says, sampling can be more hazardous than leaving the material alone. Taking samples yourself is not recommended, in the EPA phrasing.

EPA describes two kinds of accredited professional. Inspectors inspect a home or building, assess conditions, take samples of suspected materials for testing, and advise on corrections. Contractors carry out the repair or removal. Per EPA, have a home inspected by a trained and accredited professional when remodeling is planned or when building materials are damaged.

Accreditation is itself a federal construct, which makes it checkable. AHERA tasked EPA with developing a model plan for states to use in accrediting people who inspect for asbestos and carry out corrective action. Personnel working on asbestos activities in schools must be trained and accredited under the Asbestos Model Accreditation Plan, according to EPA. Asking a firm which accreditation it holds, and under which state program, is a question with a federal answer behind it.

What Drives the Cost of an Asbestos Shingle Roof Project

No federal agency publishes prices for asbestos roof work. The defensible version of a cost section is the set of cost drivers the regulations create. The first is whether the project crosses the NESHAP threshold at all. That is what determines whether notification and work-practice requirements attach to the job.

For a single-family home the answer is frequently that they do not. The EPA roof removal rule states that the NESHAP does not cover roofing projects on single family homes. It gives the same answer for residential buildings containing four or fewer dwelling units, citing 40 CFR 61.141. That section defines facility to exclude residential buildings having four or fewer dwelling units. The exclusion is a notification and work-practice exemption for the building owner. It is not a safety finding, and it does not displace state or local requirements.

Where the NESHAP does apply, the thresholds are specific. 40 CFR 61.145(a) attaches the requirements at 260 linear feet of regulated material on pipes. They also attach at 160 square feet on other facility components. A third trigger is 35 cubic feet off facility components where the length or area could not be measured. EPA applies that 160 square foot figure directly to cement shingles.

Disposal is its own line item with its own federal requirements. Under 40 CFR 61.150, asbestos waste must be adequately wet and sealed in leak-tight containers while wet. It must be labeled using the warning labels specified by OSHA at 29 CFR 1910.1001(j)(4). It then goes to a waste disposal site operated in accordance with 40 CFR 61.154. A waste shipment record, originated and signed by the waste generator, tracks it to that site. The asbestos removal guide covers what a bid should itemize.

Legal and Safety Rules for Asbestos Shingle Removal

OSHA governs the work itself whether or not the NESHAP applies. Under 29 CFR 1926.1101, no employee may be exposed above 0.1 fiber per cubic centimeter as an eight-hour time-weighted average. The same section sets an excursion limit of 1.0 fiber per cubic centimeter averaged over thirty minutes.

OSHA also prescribes how roofing comes off. 29 CFR 1926.1101(g)(8)(ii) requires roofing material to be removed in an intact state where feasible. Wet methods must be used on anything not intact, or that will be rendered not intact during removal. That requirement lifts only where wet methods are infeasible or would create a safety hazard. Cutting machines must be continuously misted during use. The parallel EPA recommendation in Appendix A is to use methods that damage roofing as little as possible.

Respiratory protection follows the same logic. OSHA requires respirators during Class II asbestos work when the material is not removed in a substantially intact state. They are also required for Class II work with no negative exposure assessment, under 29 CFR 1926.1101(h)(1). The trigger is the condition of the material coming off the roof rather than the size of the job. The asbestos respirator guide covers what that requires of an employer.

Notification, where required, runs on a federal clock. Under 40 CFR 61.145(b), written notice must be postmarked or delivered at least 10 working days before stripping or removal begins. It must be updated when the amount of asbestos affected changes by at least 20 percent. A working day is Monday through Friday, including holidays falling on those days, per 40 CFR 61.141. A licensed asbestos abatement firm prepares and files that notice.

Your Next Step: Plan an Asbestos Shingle Project

Start by leaving the roof alone. EPA guidance for a homeowner who suspects asbestos is to treat the material as if it contains asbestos. Leave it alone, and have the property inspected by a trained and accredited professional before any remodeling that could disturb building materials.

Then choose between repair and removal on evidence rather than the calendar. EPA describes repair as sealing or covering. Encapsulation means treatment with a sealant that binds the fibers together or coats the material so fibers are not released, per EPA. Enclosure means placing something over or around it to prevent release of fibers. With any type of repair the asbestos remains in place, EPA notes. The encapsulation vs removal guide compares the two paths.

Removal is not automatically the right answer even once asbestos is confirmed. EPA runs its schools program on the principle of in-place management. Removal is not usually necessary unless the material is severely damaged or will be disturbed by demolition or renovation, per EPA. EPA also states that removal is complex and must be done only by a trained and accredited professional. Improper removal may actually increase exposure to fibers, in the EPA wording.

Finally, verify the contractor against the program that regulates it. State and local agencies may have more stringent standards than the federal government, EPA notes. EPA publishes a State Asbestos Contacts list identifying the state agency that administers each program. That agency holds the most current list of accredited firms and training courses. Confirm accreditation there, get the scope in writing, and keep the waste shipment record required by 40 CFR 61.150.