Removing Asbestos Siding
Removing asbestos siding is a major exterior renovation task frequently faced by owners of mid-century residential homes and commercial structures built between the 1920s and the late 1970s. Manufactured from a blend of Portland cement and chrysotile asbestos fibers, Transite siding is exceptionally durable but brittle. While intact siding is classified as non-friable, the physical process of removing asbestos siding involves prying, de-nailing, and handling brittle shingles that can easily crack and release hazardous airborne dust if executed incorrectly.
Pre-Work Planning, Permitting, and Legal Restrictions
Before initiating the physical tear-off of exterior asbestos siding, property owners must research their regional regulatory framework. Under federal OSHA and EPA regulations, exterior siding removal is classified as Class II asbestos work. In commercial, multi-family, or public buildings, hiring a state-licensed, insured asbestos abatement contractor is legally mandatory. While some jurisdictions grant single-family residential exemptions permitting homeowners to remove siding from their own primary homes, professional abatement is strongly recommended.
Project planning also requires securing municipal building permits and, where required, filing formal 10-day advance notifications with state environmental protection agencies. Furthermore, homeowners must identify an authorized hazardous waste landfill that accepts asbestos-cement debris before taking down a single shingle. Attempting to dispose of siding in standard construction roll-off dumpsters or municipal curbside trash is illegal and results in heavy environmental fines.
Compare legal requirements and operational parameters for professional versus DIY siding removal:
| Operational Parameter | Professional Abatement Contractor | Homeowner (Where Permitted) | Regulatory Mandate |
|---|---|---|---|
| Licensing Requirement | State-licensed Class B or A contractor | Exempt in select single-family homes | OSHA 29 CFR 1926.1101 Class II |
| Advance Agency Notice | Mandatory 10-day prior NESHAP notice | Local building permit notification | State Environmental Protection Division |
| Personal Protective Gear | P100 respirators, disposable Tyvek suits | NIOSH P100 half-face mask, goggles | Mandatory respiratory protection |
| Waste Hauling Rules | Registered hazardous waste transporter | Restricted personal transport rules | DOT Hazardous Material Shipping Rules |
| Air Monitoring | Baseline and boundary perimeter testing | Usually unmonitored; high DIY risk | Mandatory on commercial projects |
Tear-Off Methodology: Gentle De-Nailing and Wet Methods
The safe physical execution of removing asbestos siding is governed by a fundamental engineering principle: keep the shingles intact and continuously wet. Workers must strictly avoid using power circular saws, reciprocating saws, pneumatic pry bars, or hammer blows that shatter brittle shingles. The work area surrounding the foundation must be lined with heavy-duty 6-mil polyethylene plastic drop cloths extending at least ten feet out from the wall to catch any falling chips or nail debris.
Technicians use pump garden sprayers filled with water mixed with surfactant soap to mist the siding before touching it. Workers gently pry the overlapping shingles upward using flat pry bars or specialized shingle rippers to expose the underlying galvanized nails. Nails should be carefully pulled or cut at the shank using end-cutting nippers rather than pounding the shingle. Each freed shingle is carefully lowered by hand—never thrown or dropped from ladders—and stacked directly onto disposal plastic.
Review safe removal techniques versus prohibited hazardous practices when removing siding:
| Removal Task | Safe Certified Technique | Prohibited Hazardous Practice | Safety / Environmental Benefit |
|---|---|---|---|
| Fastener Removal | Cut nail shanks with nippers; pry gently | Hammering shingle face; pulling with claw hammer | Prevents cracking the brittle cement shingle |
| Dust Suppression | Continuous misting with amended water | Dry removal under direct sunlight | Water binds fibers to matrix; prevents aerosolization |
| Debris Handling | Lower shingles by hand into plastic wrap | Dropping shingles from ladders into dumpsters | Eliminates explosive dust clouds caused by impacts |
| Ground Protection | 10-foot wide 6-mil poly drop cloth at base | Working directly over bare grass, dirt, or gravel | Prevents toxic shards from contaminating lawn soil |
| Power Tool Usage | Manual hand tools exclusively (snips, bars) | High-speed circular saws or reciprocating saws | Power saws eject lethal plumes of respirable dust |
Packaging, Site Cleanup, and Substrate Inspection
As siding shingles are unfastened, they must be neatly stacked on plastic drop cloths and wrapped into manageable bundles weighing no more than forty to fifty pounds. Each bundle must be double-wrapped in heavy 6-mil polyethylene plastic sheeting, sealed along all seams with duct tape, and labeled with federally mandated OSHA asbestos warning placards. Overloading bags or creating excessively heavy packages increases the risk of plastic tearing during transport.
Once all siding is stripped, technicians meticulously inspect the ground plastic, roll it inward to trap any settled debris, and dispose of the drop cloths as contaminated waste. The underlying exterior wall sheathing—typically old tar paper, asphalt-saturated felt, or wood tongue-and-groove boards—must be HEPA vacuumed and inspected for rot or water damage. If the black asphalt underlayment paper also contains asbestos, it must be removed under the same wet protocols before new siding is installed.
Examine post-removal cleanup standards and substrate preparation requirements:
| Post-Removal Phase | Required Procedure | Tool / Material Deployed | Quality Verification Standard |
|---|---|---|---|
| Ground Debris Cleanup | Fold plastic inward; HEPA vacuum soil border | True HEPA negative-air vacuum | Zero visible cement chips or shards on ground |
| Substrate Detailing | Carefully pull remaining protruding nail shanks | End-cutting pliers and pry bars | Smooth, flush wall plane ready for house wrap |
| Underlayment Inspection | Evaluate original asphalt felt paper for ACM | Bulk sampling if paper is fibrous | Safe removal or overlay with modern synthetic wrap |
| Waste Staging | Store double-wrapped bundles in secure area | Labeled, sealed 6-mil poly bundles | Protected from weather, children, and vandalism |
| New Cladding Prep | Install modern vapor-permeable house wrap | Synthetic building wrap (e.g. Tyvek) + tape | Creates weather-tight barrier for new vinyl/siding |
How to Safely Oversee Removing Asbestos Siding in 5 Steps
Follow these five certified safety steps to properly plan, execute, and verify exterior asbestos siding removal.
Confirm Asbestos Content and Obtain Permits
Have an accredited laboratory test a sample and secure necessary municipal building permits before starting.
Establish Ground Protection and Personal Gear
Lay 6-mil plastic drop cloths 10 feet out from the wall and equip all workers with P100 respirators and Tyvek suits.
Saturate Shingles and Cut Nails Manually
Thoroughly mist the siding with soapy water and cut nail shanks with nippers to release shingles intact without cracking.
Double-Wrap Shingles in Heavy 6-Mil Plastic
Neatly stack damp shingles in 40-pound bundles, double-wrap in 6-mil poly, seal with duct tape, and apply hazard labels.
Transport Waste to an Authorized Monofill Landfill
Haul sealed bundles in an enclosed vehicle under an asbestos waste manifest and obtain stamped disposal receipts.
Frequently Asked Questions (8 Questions Answered)
Q1: Is removing asbestos siding dangerous?
It is safe if shingles are kept wet and removed intact by hand, but becomes highly dangerous if shingles are sawed, broken, or smashed.
Q2: How much does it cost to remove asbestos siding?
Professional removal typically costs between $8 and $16 per square foot, totaling $8,000 to $18,000 for an average single-family home.
Q3: Can you remove asbestos siding with a circular saw?
No, cutting asbestos siding with power saws is illegal under OSHA and EPA rules because it generates lethal airborne dust clouds.
Q4: Is it better to remove asbestos siding or side over it?
Siding over it with fan-fold foam and new vinyl siding is often preferred because it is cheaper, safer, and adds extra insulation.
Q5: How do you pull nails out of asbestos siding without breaking it?
Use end-cutting nippers to snip the nail head or slide a flat shingle ripper behind the tile to gently pry the fastener.
Q6: What should you wear when removing asbestos siding?
Wear a NIOSH-certified P100 half-face respirator, disposable hooded Tyvek coveralls, safety glasses, and puncture-resistant work gloves.
Q7: Can asbestos siding be recycled?
No, asbestos siding cannot be recycled or crushed for road base; it must be permanently buried in a licensed hazardous waste landfill.
Q8: How long does removing asbestos siding take on an average house?
A professional crew typically takes 2 to 4 days to strip, package, clean up, and haul away the siding from an average house.
Final Thoughts & Key Takeaways
In conclusion, understanding removing asbestos siding provides essential clarity, practical strategies, and actionable advice. By incorporating these foundational insights, adhering to verified safety guidelines, and following structured best practices, you ensure reliable, long-term outcomes while preventing common mistakes. Stay informed, consult certified professionals when needed, and maintain consistent quality care.