Roof Tear-Off Cost Calculator

What this calculator estimates

This calculator quotes the labour and disposal cost to strip an existing roof down to the bare deck in preparation for a new roof installation in 2026 US dollars. It separates the tear-off scope from the new-system installation, which is what every legitimate re-roof quote should do. Use this number as the tear-off line you expect to see on a contractor estimate.

The bill is split into the line items real re-roof contractors invoice:

• Tear-off labour — pry-bar and shovel removal, magnetic-roller pass for stray nails, load-out to the kerb dumpster. Priced per square foot at the warranty-baseline production rate, scaled by material weight and layer count.
• Disposal and dumpster — typically one 20-yard or 30-yard roll-off, sized to the total debris weight (area × layers × material weight). Includes transfer-station fees and roll-off delivery.
• Deck repair line — visual inspection plus a percentage-of-area allowance for replacing rotted sheathing once the deck is exposed.
• Permit fee — municipal re-roof permit, required in most US jurisdictions.
• Underlayment removal — stripping old 15 lb or 30 lb felt and ice-and-water shield before installing new underlayment.
• Flashing removal — pulling old step flashing, valley flashing, and counter-flashing for replacement with the new roof.

A minimum service-call floor of $650 applies on most US tear-off jobs. Small jobs under 350 sqft hit the floor because mobilising a dumpster, crew, magnetic sweeper, and tarps is the dominant cost on tiny scopes.

How to use it

1. Roof area (sqft) — measure the projected roof area (length × width), not the surface area. For complex roofs, sum each plane.
2. Existing roof material — drives both labour rate and disposal weight. Asphalt is the fastest and lightest; tile and slate take 2x to 3x the labour and triple the dumpster capacity.
3. Number of existing layers — single-layer is the baseline; 2-layer roughly doubles labour and disposal; 3-layer is non-compliant in most US jurisdictions but still occasionally found on older homes.
4. Sheathing condition — good (visual only), fair (~10 percent replacement, typical for a 15- to 20-year-old roof), poor (~25 percent replacement, typical for a roof with documented leaks or ice-dam history).
5. Building height — single-storey is the baseline. Two-storey adds 10 percent for ladder repositioning. Three-storey or higher adds 25 percent for boom-lift or scaffold.
6. Site access — easy (clear driveway, dumpster fits at the eave line), moderate (some shrubs, narrow driveway), difficult (tight lot, side-lot drop required, hoist or crane needed).
7. Distance to transfer station — near (under 20 minutes from the job), standard (20 to 60 minutes), far (over 60 minutes / rural rate). Drives the disposal line.
8. Tear-off permit required — toggle ON for most US jurisdictions; OFF only for rural unincorporated areas with no permit requirement.
9. Remove old felt / underlayment — toggle ON for most jobs; OFF only when the underlayment is in pristine condition and the new system permits direct overlay (rare).
10. Remove old step and valley flashing — toggle ON for most jobs; OFF only when the flashing is being preserved and reused.

Typical 2026 US roof tear-off cost ranges

Add 8 to 15 percent in coastal hurricane zones where high-wind inspections and fall-arrest requirements are stricter.

Cost drivers

Material weight. Tear-off labour and disposal scale almost linearly with the weight of the existing material. A square of 3-tab asphalt is around 260 lb; an architectural laminate is 350 lb; tile is 950 lb per square; slate is 800 lb per square; metal panel is 140 lb per square. Heavier materials need more crew time per square foot and more dumpster capacity. The metal exception: panels often come off in big pieces (faster) but each square is screwed-down individually (slower) — net effect is roughly 1.4x asphalt labour.

Layers. Every additional layer doubles the strip-and-disposal cost almost exactly. A 2-layer asphalt strip costs roughly 1.9x to 2.0x a single-layer strip. The IRC permits a maximum of two layers; many state codes prohibit any overlay. If you find three layers during the strip, the deck inspection becomes critical — three layers usually means hidden deck rot, sagging trusses from overload, or both.

Deck condition. Hidden rot is the largest single cost surprise on a re-roof. On a 15- to 25-year-old asphalt roof, plan for 3 to 12 percent of the deck to need replacement once exposed. On a slate or shake roof, plan for 10 to 25 percent. Common rot zones: valleys (ice damming), eaves, under skylights, around chimneys and bath vents. Insist the contractor photograph any rotten area before replacement so you can verify spend.

Disposal cost. A 20-yard dumpster averages $480 to $620 in most US metros in 2026, including delivery, pickup, and dump fee on 4-ton load. Tonnage overage runs $85 to $150 per ton. Far-rural sites (over 60 minutes from the nearest transfer station) add 25 to 35 percent. Construction-debris recycling fees ($45 to $85 per ton extra) apply in cities with mandatory diversion programs (Seattle, San Francisco, Portland, NYC, Boston).

Permit fee. Municipal re-roof permits run $150 to $450 in 2026. Coastal high-wind zones require additional uplift inspections ($95 to $185). Historic districts may require exterior-appearance review (variable; $100 to $400). Always pull the permit — it is the single best protection against future insurance-claim denial.

Building height and access. Single-storey single-driveway homes are the baseline. Two-storey adds 10 percent for ladder repositioning. Three-storey or higher adds 25 to 35 percent for OSHA 29 CFR 1926.501-compliant fall protection. Difficult lots (tight side-yards, slope side drops, no driveway parking for the dumpster) add another 20 to 30 percent for hoist, crane, or curb-conveyor rental.

When tear-off is required versus when overlay is allowed

Tear-off required when:

• Existing roof has 2 or more layers (IRC prohibits 3).
• Visible deck sag, soft spots, or daylight from below.
• Active leaks at 2 or more locations.
• Hail or wind damage on insurance claim (carriers require deck inspection).
• Heavy material being replaced with lighter material (or vice versa) — the deck must be assessed for re-load.
• Local code prohibits overlay (most coastal and Sun Belt jurisdictions).

Overlay allowed only when:

• Existing roof is a single layer of asphalt shingles with no curl, no cupping, no granule loss.
• Deck is documented sound (recent inspection or known recent re-roof on this deck).
• New material is asphalt over asphalt (no other material combinations).
• Local code permits it (verify with the building department in writing).
• Manufacturer’s warranty allows overlay (most premium brands void warranty on overlay past the first layer).

In practice, tear-off is the correct call on more than 90 percent of US re-roof jobs in 2026. Overlay is a budget compromise with hidden long-term costs.

What to look for in a contractor

A competent tear-off contractor will:

1. Walk the roof and probe seams, valleys, and flashings before quoting — not quote from satellite imagery alone.
2. Line-item tear-off, disposal, deck repair allowance, and permit on the quote.
3. Provide a deck-repair allowance (sheets at a unit price) rather than a flat-fee number.
4. Schedule the dumpster delivery for the morning of tear-off and pickup for the day after install.
5. Magnetic-sweep the driveway and lawn after every workday (nail damage to tires and pets is the most common homeowner complaint).
6. Tarp all landscaping under the eaves before stripping starts.
7. Provide before/after photos of the deck and any rotten sheathing.

Red flags: cash-only quotes, no permit pull, vague tear-off pricing folded into the new-roof price, no magnetic-sweep mentioned in scope, sub-$0.65/sqft tear-off pricing (means the contractor is overlay-quoting and hoping you do not notice), no deck-repair allowance line on the quote.

Code references and standards (US)

• IRC R907 / IBC 1511 — Reroofing requirements; max 2 layers; deck assessment requirements.
• NRCA Field Guide (2026) — Industry quality requirements for tear-off and reroof.
• ASTM D3462 — Standard specification for asphalt shingles for residential roofs (warranty baseline).
• OSHA 29 CFR 1926.501 — Fall protection above 6 ft on commercial roofs.
• OSHA 29 CFR 1926.502 — Fall protection system specifications (PFAS, guardrails, safety nets).
• EPA Hazardous Waste Rules — Pre-1980 buildings may contain asbestos in built-up roofs; test before strip.
• IRS Tangible Property Regulations (§263(a)) — Re-roof capital improvement vs repair tax treatment.

Diagnostic checklist before tear-off

Before signing the tear-off contract, walk the roof with the contractor and confirm:

• Layer count (count at the eave drip-edge, at valleys, and at a vent boot).
• Visible deck sag from below (attic inspection with flashlight).
• Active leak history (mark stains on ceilings — these map to roof problem zones).
• Asbestos test on pre-1980 built-up roofs (mandatory in CA, NY, MA, IL — recommended everywhere).
• Solar panels (must be removed and reinstalled — $1,500 to $3,500 separate line).
• Skylights (replace at the same time as the roof — $500 to $1,500 each).
• Satellite dishes, antennas, vent fans (mark for relocation or removal).
• Gutter condition (replace at re-roof if 10+ years old — $1.50 to $4.50 per linear foot).

Related calculators

• Roof replacement cost calculator — total replacement quote including tear-off and new system.
• Roof deck replacement cost calculator — detailed deck-repair pricing when rot is found.
• Roof inspection cost calculator — pre-tear-off inspection and asbestos testing.

Sources: 2026 NRCA Field Guide; GAF Pro and Owens Corning Platinum contractor cost benchmarks; HomeAdvisor and Angi 2026 re-roof installed-quote medians (Dallas, Atlanta, Phoenix, Tampa, Columbus); IRC R907 and IBC 1511; ASTM D3462; OSHA 29 CFR 1926.501 and 1926.502; EPA NESHAP asbestos regulations.