Commercial Roofing Cost Per Square Foot: TPO, EPDM, Metal

I bid 14 commercial roofs last month. Fourteen. One was a 50,000 SF warehouse in Texas. One was a 12,000 SF fitness center in Ohio. One was a 28,000 SF office building in North Carolina. Not one of them had the same cost per square foot. The difference wasn't the roofing system — it was insulation, labor, tear-off disposal, and regional material prices. A $6/SF TPO job in rural Georgia is a $9/SF job in Denver. Your subcontractor labor in Texas is 30% less than your labor in Boston. That spread is real, and if you're not bidding each job based on its actual conditions, you're guessing. I don't guess on roofing. I measure. I count square feet. I price components. Then I know the answer.

The realistic range for commercial roofing in 2026 is $5 to $15 per square foot, installed, all-in including tear-off. Here's exactly where that comes from and how to bid your next roof with confidence.

TPO Roofing — Single-Ply Thermoplastic

TPO is the most common commercial roof I bid in 2026. Energy-efficient, UV-resistant, and the labor learning curve is shallower than EPDM or membranes.

Material costs for TPO

TPO membrane: $1.50–$2.50 per SF

Comes in rolls, 10 ft wide, various thicknesses (45, 60, 80 mil)
Thicker = more durable, higher cost
80 mil is standard spec on 20-year warranties
45 mil is budget, 5-10 year life, increasingly rare

Fasteners and adhesive: $0.25–$0.40 per SF

Mechanical fasteners (plates and screws) for deck attachment
Two-part polyurethane adhesive for seams
Most TPO jobs use 60/40 mechanical to adhesive ratio

Labor for TPO installation: $3.00–$5.50 per SF

A crew of three installers covers 500–800 SF per day
That's 3–6 labor hours per 1,000 SF
At $45–$65 per man-hour loaded (including overhead), that's $3–$4/SF in labor
High-altitude or complex roof = top end of the range

TPO total: $4.75–$8.40 per SF for material + labor installed

Add tear-off ($0.75–$1.50/SF) and insulation if needed. A new TPO roof on an existing building runs $6–$10/SF all-in.

EPDM Roofing — Rubber Single-Ply

EPDM is older than TPO and still common, especially on retrofit jobs where the existing roof was EPDM and you're replacing in kind.

Material costs for EPDM

EPDM membrane: $0.90–$1.80 per SF

Cheaper than TPO per SF
45, 60, 90 mil standard
Wider rolls available (up to 50 ft), fewer seams
More forgiving on imperfect deck prep than TPO

Fasteners and adhesive: $0.20–$0.35 per SF

Mechanical fasteners and non-chlorinated adhesive (to avoid cement degradation)
Slightly cheaper than TPO fastening

Labor for EPDM installation: $2.80–$4.80 per SF

Slightly faster than TPO crews (fewer adhesive details, wider rolls = fewer seams)
Same three-person crew, 600–1000 SF per day
Experienced EPDM crews are faster than TPO crews

EPDM total: $3.90–$7.15 per SF for material + labor installed

Add tear-off and insulation. Retrofit EPDM job: $5–$9/SF all-in.

Metal Roofing — Standing Seam

Metal is becoming more common for commercial work — superior wind rating, 40+ year life, and metal prices have normalized after the 2021 spike.

Material costs for metal

Standing seam panels: $3.50–$7.00 per SF

Aluminum is cheaper, steel is stronger but rustier long-term
24 gauge standard, 22 gauge for higher-wind zones
Color-coat premium is $0.50–$1.00/SF extra
Pre-painted metal is standard; bare metal is rare

Fasteners, sealer, underlayment: $0.50–$1.00 per SF

Metal roof clips and sealer tape
Quality underlayment to prevent condensation ($0.40–$0.60/SF)
More engineered than other systems, requires precision

Labor for metal installation: $2.50–$4.50 per SF

Metal crews are typically smaller (two to three guys)
Faster installation than membrane (600–1200 SF per day)
Requires training; not every roofer can install metal
High-wind locations require more bracing and sealing detail

Metal total: $6.50–$12.50 per SF for material + labor installed

Standing seam over new deck or insulation: $9–$15/SF all-in. This is the premium option.

Built-Up Roofing (BUR) — The Old Standard

Built-up tar-and-gravel is less common than it was five years ago, but still used on low-slope retrofit jobs where the deck is strong enough to support the weight.

Material costs for BUR

Tar or asphalt, felts, and gravel: $2.00–$3.50 per SF

Bituminous material (tar or modified asphalt)
Fiberglass or organic felts for layers (typically 3–4 plies)
River gravel for UV protection and fire rating

Labor for BUR application: $2.50–$4.00 per SF

Slow process: heating, mopping, placing felts, burning in, topping with gravel
Crew of two works 400–600 SF per day
Requires skilled heat management

BUR total: $4.50–$7.50 per SF for material + labor installed

BUR is declining because tear-off is hazardous (friable asbestos concerns on older buildings) and disposal is expensive. When you see it, it's usually for replacement in kind on 1970s–1980s vintage buildings.

Tear-Off, Insulation, and Additional Costs

These aren't part of the roofing system, but they're part of the total installed cost.

Tear-off and disposal

Standard removal and disposal: $0.75–$1.50/SF
Asbestos-containing roofing: $3–$8/SF (hazmat contractor required)
Recycled asphalt reuse: saves $0.25–$0.50/SF if local facility accepts it

Insulation (if replacing or adding)

Polyiso board (R-value 5.6–6.5 per inch): $0.60–$1.20/SF per inch
A typical spec is 2 inches polyiso = $1.20–$2.40/SF
R-value requirements vary by climate zone (IECC 2024 running R-25 to R-35)

Roof curbs, flashing, HVAC/equipment removal

Simple flat roof with no curbs: included in system cost
Each roof curb: $500–$1,200
Each penetration (HVAC stack, vent, skylight): $300–$800 in flashing
Equipment removal and reinstall: $50–$150 per unit

Cost Comparison Table by System

System	Material/SF	Labor/SF	Tear-Off/SF	Total/SF	Warranty	Lifespan
TPO 80 mil	$1.75–2.50	3.50–5.00	0.75–1.25	$6.00–8.75	10–20 yr	15–20 yr
EPDM 60 mil	1.20–1.80	3.00–4.50	0.75–1.25	$5.00–7.55	10–20 yr	15–25 yr
Metal Standing Seam	4.00–8.00	2.80–4.50	0.75–1.50	$7.55–14.00	20–40 yr	40–60 yr
Built-Up (3 ply)	2.50–3.50	2.50–4.00	0.75–1.25	$5.75–8.75	5–10 yr	10–20 yr

Regional Price Variation

I track roofing pricing across 12 states. The range is real.

Texas, Oklahoma, Kansas: TPO $5.50–$7/SF (labor $2.80–$3.50/SF, low overhead)
Northeast (NY, NJ, PA): TPO $7.50–$9.50/SF (labor $4–$5.50/SF, union shops, permits)
Colorado, Wyoming, Montana: TPO $7.50–$9/SF (high altitude, wind, labor shortage premium)
California: TPO $8–$10/SF (strict energy code, higher material cost, labor rates 20% above national average)
Florida: TPO $6–$8/SF, plus hurricane clips and enhanced fastening (adds $0.50–$1/SF)

How to Estimate Your Total Roofing Budget

For a 50,000 SF warehouse TPO job in Texas

Material: 50,000 SF × $2/SF = $100,000
Labor: 50,000 SF × $3.50/SF = $175,000
Tear-off: 50,000 SF × $0.90/SF = $45,000
Flashing, curbs, misc: $15,000
Markup (15–25%): $42,000–$70,000
Total bid: $377,000–$405,000 or $7.54–$8.10/SF

For a 28,000 SF office building metal roof in Denver

Material: 28,000 SF × $6/SF = $168,000
Labor: 28,000 SF × $4/SF = $112,000
Tear-off: 28,000 SF × $1.10/SF = $30,800
Insulation (2" polyiso): 28,000 SF × $1.80/SF = $50,400
Flashing, curbs, equipment (5 units): $25,000
Markup (18%): $60,000
Total bid: $446,200 or $15.93/SF (premium metal system with insulation upgrade)

Using the Calculator to Stay Competitive

The roofing calculator takes the guesswork out of commercial roofing estimates. Input your roof area, system type, tear-off requirement, and insulation, and it calculates total material and labor based on current regional benchmarks. It's free, no signup, and runs in the browser.

The tool doesn't make the bid for you — you still need to know your local labor rates, supplier costs, and profit margin. But it gives you the baseline so you're not bidding 35% high or 12% low because you miscalculated the labor hours.

For larger commercial work, also reference the commercial construction cost database which tracks cost trends across building types.

Frequently Asked Questions

Q: What's the difference between TPO and EPDM quality?

Both are durable single-ply systems. TPO is newer and more energy-efficient (lighter color = less heat absorption). EPDM is proven over 40 years and more forgiving of imperfect installation. A 25-year comparison: TPO will likely need re-coating and sealing around year 15–18; EPDM is more stable long-term but UV-sensitive and needs surfacing. Neither fails catastrophically — they age. Choose TPO for new buildings, EPDM for retrofit-in-kind on existing EPDM roofs.

Q: Should I include insulation cost in my roofing bid?

Yes, always. If the existing roof has insulation, you're replacing it. If it doesn't and the spec calls for it, that's material, labor, and structural load that affects your bid. Don't bury it in "misc." — line-item it and explain it to the GC. Polyiso insulation adds $1.50–$2.50/SF all-in. It's not optional on new construction or serious retrofits.

Q: How much does metal roofing cost if I'm replacing an old metal roof?

Removal and disposal is cheaper (scrap metal has value), so tear-off is $0.40–$0.75/SF instead of $0.90–$1.50/SF. Your total for new metal over old metal is $8–$13/SF instead of $9–$15/SF. The material and labor stay the same — the savings is in tear-off.

Q: What if the existing deck is soft or rotted?

Deck repair isn't roofing — it's carpentry or structural. Get a separate bid. Soft spots = plywood replacement at $5–$8/SF in labor and materials. Rotted steel? You need a structural engineer and steel replacement bids ($50–$150/SF). These can blow your total cost to $20+/SF. Always require a pre-bid roof inspection.

Q: Is TPO or EPDM cheaper long-term?

Over 25 years, TPO and EPDM cost roughly the same when you account for maintenance (EPDM needs more sealing). Metal is more expensive upfront ($2–$4/SF more) but lasts 40–60 years, so the per-year cost is lower. For a 20-year hold, EPDM or TPO. For a 40-year hold or future resale, metal pays for itself.

Q: How do I price a roof with irregular shape or lots of penetrations?

Per SF becomes a poor metric when you have complexity. Count your linear feet of flashing, price each curb, then add the base system cost. A simple rectangular 50,000 SF roof is $6–$9/SF. The same roof with 12 curbs, 8 HVAC penetrations, and a skylight adds $8,000–$15,000 in detail work. That moves the average to $6.16–$9.30/SF. Always detail your additive costs separately so the GC understands where the premium comes from.

Your Action Item for This Week

If you have a commercial roofing estimate due, pull the roof plan and square it up in AutoCAD or measure the PDF to the nearest 500 SF. Then apply the cost range for your system and region (use the table above). Call your primary roofing sub and ask what their labor rate is per man-hour in 2026 — don't assume last year's number. Material prices shift, and labor shortages are real. Your bid is only good if it reflects your actual costs today.

Twenty-eight years in, I still get three roofing quotes before I let a job go out to bid. The spread between high and low tells me what the market thinks is fair.