Asbestos Siding: How to Identify It, the Rules and Removal Costs

Today’s results for this topic include a forum thread, a law firm, a video and lab marketing pages. This one reads the federal rule, four agency guides and five published price lists side by side. Roofing has its own rules, covered on our asbestos shingles page.

Five clues that point to asbestos-cement

No clue is proof. Each raises or lowers suspicion enough to decide whether a sample is worth taking; our asbestos testing cost guide lists published lab fees.

Clue	What to look for	Why it matters
Era	Asbestos-cement shingles and siding were produced into the 1980s, per the NPS; Hatschek’s patent was reissued in the US in 1907.	A re-clad older house can still hide original shingles.
Rigid and brittle	Cement snaps and chips at corners; it does not bend or dent.	Vinyl flexes and wood dents.
Nails near the lower edge	On the HABS photograph below, nails sit just above the bottom of each course. EPA notes A/C roof shingles came with factory-punched pilot holes.	Face-nailed, not hidden behind a lap.
Pressed face	The NPS describes pressing that gave a rough rustic surface or one imitating weathered wood.	Identical grain course after course means a moulded product.
Pattern	Straight courses with a wavy lower edge, or diamond and hexagonal layouts (the NPS lists American, Dutch Lap and French).	The diamond wall in the first photograph is a strong flag.

Per the EPA roofing guidance manual (EPA-340/B-94-001), A/C roof shingles were cut from 9 by 16 to 14 by 30 inches. No federal size table for siding was found, so do not rule a shingle in or out by size. The Southwest Clean Air Agency’s sampling method is to wet and break off about one square inch into a sealed bag; skip the test and its guide says to assume asbestos.

Asbestos-cement, fibre-cement or vinyl

Asbestos-cement and fibre-cement are both rigid, cementitious and paintable. The difference is the fibre. The 2015 James Hardie safety data sheet for HardiePlank and HardieShingle lists crystalline silica, calcium silicate, calcium carbonate and cellulose, with no asbestos. Installation date is the first sorting tool.

Material	Made of	In the hand	Status
Asbestos-cement (transite)	Cement and asbestos fibre; 15 to 40% in A/C sheet per EPA	Rigid, brittle, chips at corners	Category II nonfriable ACM
Fibre-cement (modern)	Cement, silica and cellulose (under 15% on the Hardie SDS); no asbestos listed	Rigid; planks or shingles, usually newer installs	Not ACM; cutting makes silica dust
Vinyl	Plastic	Flexes and dents; hollow back	Not ACM; often laid over older cladding
Wood	Timber	Grain varies piece to piece	Not ACM; may hide A/C shingles beneath

Why intact siding is non-friable, in the rule’s own words

The definitions sit in 40 CFR 61.141, the asbestos NESHAP. The test is mechanical: can the dry material be crumbled by hand pressure? Cement siding cannot, so it is Category II. EPA’s roofing manual adds that Category II material is more likely to become friable when damaged than Category I, which is why handling drives every rule below.

NESHAP term	Definition (40 CFR 61.141)	Where siding sits
Friable	Can be crumbled, pulverized or reduced to powder by hand pressure when dry	Not intact cement siding
Category I nonfriable	Packings, gaskets, resilient floor covering, asphalt roofing products over 1%	Roofing; see our shingles page
Category II nonfriable	Any other material over 1% that cannot be crumbled by hand pressure when dry	Intact asbestos-cement siding
RACM	Includes Category II material with a high probability of becoming crumbled, pulverized or reduced to powder	Siding that will be smashed, ground or bulldozed

Two limits matter. The same section excludes residential buildings having four or fewer dwelling units from the facility definition, so a single house is generally outside the NESHAP, though not outside state rules. And per 40 CFR 61.145, covered jobs cross the threshold at 160 square feet of RACM on facility components, with notice due 10 working days ahead.

What turns it into regulated material

The EPA letter of 14 January 1993, linked from the EPA transite siding guidance page, says transite, typically Category II nonfriable ACM, must be removed before demolition if the building has at least 160 square feet of ACM, because almost all demolition will subject it to the regulation if left in place. Left in place during a normal demolition, the whole debris pile becomes regulated waste.

Smaller disturbances follow the same logic. The EPA homeowner asbestos guidance says not to saw, sand, scrape or drill holes in asbestos-containing material. OSHA 29 CFR 1926.1101 prohibits cutting, abrading or breaking siding, shingles or transite panels unless less fibre-releasing methods cannot be used, and requires amended water and lowering by chute, crane, hoist or wrapped bundle. And 40 CFR 61.145(c)(6) bars dropping, throwing or sliding regulated material.

Pressure-washing is the trap, because it is how siding gets prepared for paint. The WorkSafe WA safety alert 12/2018 reports that high-pressure water breaks down the cement surface and spreads residue over neighbouring properties, with clean-up costs of $7,000 to $50,000 reported there. It is prohibited in that state.

Leave, paint, cover or remove

The EPA homeowner asbestos guidance frames the choice: intact material that will not be disturbed will not release fibres, sealing binds or coats it, covering places something over it, and removal may be required when remodelling will disturb it.

Option	What it involves	Published cost	The catch
Leave it	Keep intact; secure loose pieces without breaking them	Nil	SWCAA calls it possibly the safest, easiest and least expensive option
Paint (encapsulate)	Damp-wipe, low-pressure spray; never sand	$2 to $6 per sq ft (three guides)	UK HSE: done wrongly, painting can make the product fail
Cover (overclad)	New siding fastened through or over the old	Not priced by any guide read	Banned in Lane County, Oregon: installation renders CAB friable
Remove	Wet, cut nail heads, pry off whole, wrap, landfill	$3 to $15 per sq ft (five guides)	Who may do it varies by state

The most specific published painting method found is the UK HSE’s: repair the surface, wipe dust with a damp rag, paint preferably by low-pressure spray, never sand or rub down. It is not automatically cheap: Fixr reports encapsulation up to $6 a square foot against removal from $7.

The decision path

Seven questions, in order. Each one ends the decision or narrows it.

1. Is work planned that touches the wall? If not, keep the siding intact and stop here.
2. Is it asbestos-cement? If two or more clues fit, test a sample or presume it is ACM, as Oregon’s LRAPA allows on a single-material job.
3. What condition is it in? Connecticut requires a licensed abatement contractor when shingles cannot come off mostly intact.
4. What is the building? An owner-occupied single house sits outside the federal facility definition; rentals, multi-unit and commercial buildings usually do not.
5. What does your agency require? Find the state programme on our asbestos accreditation map, then the local air agency.
6. Is the cheaper finish legal there? Paint only by low-pressure methods; overclad only where fastening through transite is allowed.
7. Budget from line items. Measured area, the disposal site’s fee and replacement cladding, priced separately.

Who may remove it, by jurisdiction

Because the NESHAP leaves most houses out, the agency that governs a re-siding job is usually a state health department or a regional air agency. Six published positions:

Jurisdiction	Who it covers	Permission and notice	Handling and disposal
Federal (EPA NESHAP)	Excludes buildings of four or fewer units	160 sq ft RACM; notice 10 working days ahead	Wet, seal leak-tight, label, approved landfill
Federal (OSHA)	Duties written for employers of the workers	Siding removal is Class II work	Amended water; cut nails with flat, sharp tools; lower panels
Washington (SWCAA)	Owner-occupied single-family homes	Owner or certified abatement contractor only	Two layers of 6 mil plastic; dispose within 10 calendar days
Oregon (LRAPA)	Accredited survey before renovation	Notification and fee for non-friable CAB	No overclad; permitted landfill; shipment form
Connecticut (DPH)	Homeowner may usually remove it	Licensed contractor if not removable mostly intact	Special waste; no more than 1 cubic foot in household trash
Minnesota (MDH)	Lists transite siding in homes	Strongly recommends a licensed contractor	Avoid breaking, sanding, cutting, drilling

The Southwest Clean Air Agency guide is the fullest US agency homeowner procedure for this material: a 6-foot strip of 6 mil plastic at the wall base, hosing about 50 square feet at a time, pulling or cutting nails and lowering each wetted piece by hand, per the guide. It applies only to an owner-occupied single-family home.

Removal prices, by named source

Five consumer cost guides publish a figure. None names the contractors behind it, and they disagree, so they are shown with dates rather than averaged.

Source	Updated	What is priced	Published figure
Fixr	August 2022	Removal, per sq ft	$7 to $9
Fixr	August 2022	Example, 1,500 sq ft home	about $7,500
HomeAdvisor siding guide	20 June 2026	Typical job	$708 to $5,696 (average $3,202)
HomeAdvisor siding guide	20 June 2026	Per sq ft	$8
HomeAdvisor removal guide	17 June 2026	Siding, per sq ft	$3 to $15
The Asbestos Institute	8 January 2024	Per sq ft	$7 to $10
The Asbestos Institute	8 January 2024	2,000 sq ft, with disposal	$14,000 to $20,000
Bob Vila	21 December 2023	Siding, per sq ft	$7 to $9
Computed here	11 October 2026	Fixr rate times 1,500 sq ft	$10,500 to $13,500

Two inconsistencies matter. According to Fixr, removal is $7 to $9 a square foot, yet its example puts a 1,500 square foot home at about $7,500; at its rate that area is $10,500 to $13,500. HomeAdvisor reports a typical job of $708 to $5,696 at $8 a square foot, implying about 88 to 712 square feet: a partial wall, not a house.

New cladding is a separate line: Fixr reports $7,500 to $22,500. For coverage questions, our page on whether insurance covers asbestos removal reads policy language; your policy and state insurance department have the final word.

For contractors

For restoration firms, siding usually arrives sideways: a storm-damaged wall, a fire elevation or a window opening cut through transite. Removal by employees is Class II asbestos work under OSHA, with cementitious siding practices in paragraph (g)(8)(iii). Scope it before demolition starts.

Document or line item	Why the file needs it
Survey or test result before the wall is opened	LRAPA requires a survey on site; EPA’s 1993 letter makes left-in-place transite a demolition problem
Area by elevation, with condition notes	Sets whether the 160 sq ft line applies and whether pieces will come off intact
Method statement: wet, cut nails, lower, never drop	Mirrors OSHA 1926.1101(g)(8)(iii)
Notification copy, where required	LRAPA and covered NESHAP jobs
Waste manifest and landfill ticket	SWCAA requires a manifest; Connecticut treats it as special waste
Separate lines: removal, disposal, new cladding	What an adjuster compares against published figures

An adjuster typically asks for the test result, measured area, method and disposal receipt. Our asbestos removal cost guide covers abatement pricing more broadly, and the standards hub collects the rules used here.

Questions people actually ask

Is it okay to live in a house with asbestos siding?

Agency guidance treats intact siding as low concern. Minnesota’s health department says asbestos cement siding that is intact and in good condition is generally considered nonfriable and not hazardous, and the Southwest Clean Air Agency says it will not release fibres unless disturbed. The concern comes from breaking, drilling, sanding or pressure-washing it, so plan any wall work around it.

How can you tell if siding has asbestos?

Look for rigid, brittle cement shingles on a house clad before the mid-1980s, with nails in a row near the lower edge, a pressed wood grain or rough face, and straight or diamond courses. Those clues only raise suspicion. A laboratory test of a small wetted sample confirms it, or you can presume the material is asbestos and follow the handling rules.

Is it worth removing asbestos siding?

Often not, unless work forces it. The Southwest Clean Air Agency calls leaving it alone possibly the safest, easiest and least expensive option, and Connecticut does not require removal unless a renovation or demolition puts the shingles in the way. Removal makes sense when the wall must be opened, the shingles are failing, or a demolition is planned.

Can you still get asbestos siding?

Not as a new US product. The National Park Service says asbestos-cement shingles and siding were produced into the 1980s, and EPA’s 1994 roofing manual describes A/C shingles as no longer manufactured in the US. Salvaged pieces still circulate. US law never simply banned the material; our page on when asbestos was banned explains why.

Can you paint asbestos siding?

Yes, with care. EPA lists sealing as a recognised repair, and the UK Health and Safety Executive’s sheet a16 sets the method: repair the surface, wipe dust with a damp rag, paint preferably by low-pressure spray, and never sand or rub down. Do not pressure-wash first; Western Australia prohibits high-pressure water on asbestos cement.

Can you put new siding over asbestos siding?

It depends on your agency. HomeAdvisor’s guide says covering is safe when an asbestos professional takes precautions, but Lane Regional Air Protection Agency in Oregon does not allow new siding over cement asbestos board because installation renders it friable. Fasteners pass through or between shingles, so check local rules before quoting an overclad.