Free tool · 2026 Arizona pricing
Flat Roof & Roof Coating Cost Calculator
Price a flat or low-slope roof in Arizona: foam recoats, silicone and acrylic coatings, new spray foam, TPO and modified bitumen. Then work out how many gallons of coating the job needs.
- Foam, coatings, TPO & mod bit
- Coating gallons calculator
- Homes, HOAs & commercial
- Free roof inspection with photos
Foam roof recoat, 2,000 sq ft.
What’s in the range
Typical 2026 Arizona market ranges, not a quote. A core sample or moisture check on foam roofs tells us whether a recoat is still possible.
Every option for this roof
Your roof area and options applied to each project type. Tap a row to switch.
| Project | Estimated cost | Range | $/sq ft |
|---|
Roof coating calculator: how many gallons?
Coverage depends on the dry film thickness you need and the coating’s volume solids. Check both on the product data sheet.
Formula: gallons = area × dry mils ÷ (1,604 × volume solids), plus 10% waste. One gallon spread over one square foot is 1,604 mils thick.
Your exact price
Get Your Exact Flat Roof Price
The calculator gives you a realistic range. A free inspection checks the foam or membrane for moisture and damage and ends with a written price.
- Free on-roof inspection with photos
- Written, line-item estimate
- Licensed & insured — ROC#356304
- GAF President’s Club 2026
Prefer to talk? Call (480) 463-3483, 24/7.
How it works
How Flat Roof Prices Are Calculated
The calculator multiplies your roof area by a typical installed price per square foot for the project you choose. For coatings, it adds repairs to damaged foam or membrane first, because a coating is only as good as the surface under it. New roof systems include one layer of tear-off and a permit allowance.
| Project | Per sq ft | Notes |
|---|---|---|
| Foam roof recoat – acrylic | $1–$4 | Clean, prime, two coats |
| Foam roof recoat – silicone | $1.50–$4.50 | Silicone adds about $0.40–$0.80 |
| Silicone coating over existing roof | $1.50–$4.50 | Over mod bit, BUR or metal |
| Acrylic / elastomeric coating | $0.50–$2.50 | Over a sound, well-drained roof |
| New spray foam (SPF) roof | $4–$10 | Includes one-layer tear-off |
| TPO single-ply | $5–$10 | Includes one-layer tear-off |
| Modified bitumen | $4–$8 | Includes one-layer tear-off |
| Repairs before coating | $0.75–$2.50 | Per sq ft of damaged area |
| HOA / multiple buildings | 15–25% less | Coating jobs priced at volume |
| Permit (new roof systems) | $150–$650 | Varies by city |
Typical 2026 ranges from published Phoenix-area and Arizona foam, coating and flat-roof pricing, cross-checked between sources. Not a quote. Commercial roofs with insulation upgrades price differently; see commercial roof replacement cost.
Arizona flat roofs
What Changes a Flat Roof Price
- Condition of the foam or membraneWet, blistered or UV-damaged areas must be cut out and repaired before any coating goes on. That is the biggest swing in a recoat price.
- Drainage and pondingWater that sits for days breaks down many acrylic coatings. Ponding areas may need silicone, crickets or added slope.
- Parapets, scuppers and canalesPueblo-style roofs have walls and drains that need detailed flashing and coating work. Scuppers and downspouts
- Rooftop equipmentAC units, ducts and pipes take extra time to work around and seal.
- Access and building heightTall buildings, tight lots and occupied businesses add setup and labor time.
- TimingA recoat done before the coating wears through avoids paying for new foam later. Flat roof maintenance in Arizona
Reviews
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Free roofing calculators
More Arizona Roofing Calculators
Each tool uses the same Arizona market data, so the numbers line up from one calculator to the next.
Roof Replacement Cost Calculator
Price a new roof by size, material, pitch and add-ons, with every roof type side by side.
Replacement calculator →+Roof Repair Cost Calculator
Leaks, broken tile, flashing, pipe boots, flat-roof patches and emergency tarps.
Repair calculator →∠Roof Pitch Calculator
Convert rise and run to pitch, angle and slope, with the roof area multiplier for your pitch.
Pitch calculator →ft²Roof Square Footage Calculator
Turn your home’s footprint and pitch into roof square feet, squares and shingle bundles.
Square footage calculator →FAQ
Flat Roof & Coating Questions
How much does a flat roof cost in Arizona?
A new flat roof typically runs about $4–$10 per sq ft for spray foam, $5–$10 for TPO and $4–$8 for modified bitumen, including tear-off of one layer. On a 2,000 sq ft roof that is roughly $8,000–$20,000. Recoating an existing foam roof costs far less.
How much does it cost to recoat a foam roof?
Most Arizona foam recoats run about $1–$4 per sq ft with acrylic, including cleaning, priming and two coats. Silicone adds roughly $0.40–$0.80 per sq ft. On a 2,000 sq ft roof, an acrylic recoat is often about $2,000–$4,000, plus any foam repairs.
How many gallons of roof coating do I need?
Multiply the area by the dry mils you need, then divide by 1,604 times the coating’s volume solids. For example, 2,000 sq ft at 20 dry mils of a 50% solids acrylic needs about 50 gallons, or about 55 with 10% waste. Higher-solids silicone needs fewer gallons for the same thickness.
Should I use silicone or acrylic roof coating?
Acrylic costs less and works well on roofs that drain properly. Silicone costs more but holds up better where water ponds. Very little sticks to silicone except more silicone, so a silicone-coated roof is usually recoated with silicone.
When should a foam roof be recoated instead of replaced?
Recoat while the foam is still dry and sound and the coating has simply worn thin. If large areas of foam are wet, crushed or exposed to the sun for a long time, sections or the whole roof may need new foam. A moisture check or core sample tells you which.
Is foam or TPO better for an Arizona flat roof?
Both work in Arizona. Spray foam is seamless, adds insulation and is renewed by recoating. TPO is a reflective single-ply membrane with heat-welded seams. Drainage, the existing roof and how long you plan to own the building usually decide it.
Get a Firm Price for Your Flat Roof
Book a free inspection. We check the foam or membrane, photograph what we find and give you a written price for a recoat, repair or new roof.
Get My Free Inspection(480) 463-3483