Built-up roof replacement typically costs $5-$12 per square foot, or about $50,000-$120,000 for a 10,000-square-foot commercial roof. Total price depends on roof size, number of asphalt-and-felt plies, insulation needs, tear-off, access, and local labor rates.
The ranges below assume a conventional flat or low-slope roof and professional installation. Repairs to wet insulation, structural damage, or drainage can raise the estimate.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Installed BUR roof | $5/sq ft | $8/sq ft | $12/sq ft | New membrane and standard installation |
| 10,000-sq-ft replacement | $50,000 | $80,000 | $120,000 | Before major deck repairs |
| Tear-off and disposal | $1/sq ft | $2/sq ft | $4/sq ft | Varies with layers and disposal access |
| Roof inspection | $150 | $400 | $800 | May be credited toward a project |
What a new built-up roof costs by square footage
Contractors commonly price built-up roofing (BUR) by the square foot or roofing square. One roofing square covers 100 square feet. A new BUR assembly generally runs $5-$12 per square foot installed, equivalent to $500-$1,200 per square. A straightforward job with good roof access and no tear-off tends toward the lower end; complex removal, upgraded insulation, or numerous penetrations pushes the quote upward.
A practical budget for a standard 10,000-square-foot roof is $50,000-$120,000, with roughly $80,000 as a midpoint. The midpoint assumes ordinary commercial-grade materials, a typical multi-ply assembly, and normal access in a middle-cost U.S. market. It is not a guaranteed national price: contractor availability, building height, roof condition, and local disposal costs matter.
Smaller roofs may have a higher per-square-foot rate because mobilization, safety setup, and equipment costs are spread over fewer square feet. For example, a 2,000-square-foot project at $7-$12 per square foot could total $14,000-$24,000. Larger, unobstructed roofs may achieve lower unit pricing, but extensive drains, curbs, skylights, and rooftop equipment can erase some scale savings.
Assumptions: Existing commercial low-slope roof, standard access, ordinary BUR materials, and no major structural repairs.
How felt plies, asphalt, insulation, and labor shape the quote
A replacement quote usually combines the new roof assembly with labor, tear-off, disposal, and project overhead. The breakdown below gives common planning ranges; individual bids may group some tasks together. For a 10,000-square-foot roof, multiply each per-square-foot range by 10,000 to estimate a rough line-item total.
| Quote component | Typical rate | 10,000-sq-ft example | What changes the price |
|---|---|---|---|
| Felt, asphalt, surfacing | $2-$5/sq ft | $20,000-$50,000 | Number of plies, asphalt type, gravel or cap sheet |
| Insulation and cover board | $1-$4/sq ft | $10,000-$40,000 | Thickness, board type, required thermal value |
| Installation labor | $1.50-$4/sq ft | $15,000-$40,000 | Crew size, roof access, detail work, local wages |
| Tear-off and disposal | $1-$4/sq ft | $10,000-$40,000 | Existing layers, landfill fees, hauling distance |
| Flashing and roof details | $0.50-$2.50/sq ft | $5,000-$25,000 | Parapets, drains, curbs, penetrations |
For a full replacement, materials and labor are only part of the bill; removal and roof details can add several dollars per square foot. Labor can be estimated with , but contractors generally use crew production rates and project pricing rather than billing every hour separately. Ask whether the quote includes taxes, permits, protection, cleanup, and disposal.
Which roof size, ply count, and insulation specs raise the price?
Roof area is the first major pricing variable, but assembly specifications can change the rate substantially. A basic three-ply system may cost less than a four- or five-ply assembly with upgraded surfacing. More plies require additional material and installation time; the right specification depends on the building, climate, code requirements, and designer’s instructions.
Insulation thickness and condition are especially important. Adding or replacing roughly 1-2 inches of insulation may add about $1-$3 per square foot, while thicker or higher-performance boards can add $3-$5 per square foot or more. If moisture is found beneath the roof, affected insulation often must be removed rather than covered. Wet areas can add $2-$8 per square foot of affected section, depending on depth and repair scope.
Scope changes at 10,000 square feet can move the total by tens of thousands of dollars. For instance, a $2-per-square-foot upgrade to insulation adds $20,000. If a roof has several layers, high parapets, or crowded rooftop equipment, removal and detailing also take longer than a clean, open roof. Ask bidders to state the assumed area, ply count, insulation thickness, and whether they expect a full tear-off.
Drainage and deck condition affect price as well. Ponding water may indicate low spots that need tapered insulation or other correction. Localized deck repairs might cost $5-$15 per square foot of repaired area, while extensive structural work requires a separate evaluation. A proposal should distinguish known repairs from allowances for concealed damage discovered after tear-off.
When tear-off, deck repairs, and crane access add charges
Removing an existing BUR roof commonly adds $1-$4 per square foot for labor, hauling, and disposal. A single light layer with convenient loading access is less costly than multiple layers of asphalt, felt, and gravel. Gravel surfacing can add weight and handling time, while limited staging or a long path to the disposal container may increase labor and equipment charges.
Crane or hoist service may add roughly $500-$2,500 or more per workday, depending on lift capacity, rental duration, travel, and setup. Building height, street closures, and restricted loading zones can require additional coordination or permits. These costs are often more noticeable on small roofs because the fixed equipment charge is divided across fewer square feet.
Confirm removal depth and disposal in writing before comparing bids. One contractor may price removal of the membrane only, while another includes insulation and multiple existing layers. Quotes should also explain how concealed wet areas or damaged decking will be priced, such as a stated per-square-foot repair rate or a written change order requiring approval.
Older buildings may need extra protection for equipment, walls, landscaping, or occupied spaces. Temporary waterproofing between workdays, safety rails, and protection against debris can be included or billed separately. If a project needs overnight dry-in or phased work, ask whether the proposal includes those labor and material charges.
How long a commercial BUR replacement takes
A crew of four to six roofers may need about one to three weeks to replace a typical 10,000-square-foot roof, depending on weather, removal, roof details, and daily work hours. A simple open roof can move faster; occupied buildings, multiple levels, complicated drainage, or extensive repairs can extend the schedule. Contractor estimates should specify approximate start dates and whether the duration includes tear-off and cleanup.
Labor rates vary by market and specialty. Commercial roofing labor may translate to roughly $50-$100 per worker-hour in the project price after payroll costs, supervision, insurance, and overhead are accounted for. This is not necessarily the hourly wage paid to a roofer. The effective rate can be higher for urgent mobilization, difficult access, or work requiring additional safety measures.
Weather delays can add time even when the contract price stays fixed. BUR installation depends on dry conditions and careful handling of hot asphalt or other specified materials. Ask how the crew will protect an exposed roof if rain interrupts work, and whether temporary cover, extra mobilization, or schedule extensions carry additional charges.
How U.S. location and roof access change BUR pricing
Labor, disposal, insurance, and equipment prices vary across the country. As a rough planning adjustment, a high-cost coastal city may run 15%-30% above a national midpoint, while a lower-cost rural market may be 10%-20% below it. These are broad comparisons, not fixed regional rates; a remote site can still cost more if materials and crews must travel a long distance.
Urban buildings often have higher delivery and access costs because of traffic, street restrictions, limited staging space, and crane coordination. A suburban warehouse with a broad, unobstructed roof may be simpler to service. Rural projects can have lower labor rates but higher freight charges or fewer available commercial roofers, especially during busy periods.
Use local bids to calibrate the estimate rather than applying one national rate blindly. For a $80,000 midpoint project, a 20% market premium would imply about $96,000 before unusual repairs; a 15% discount would imply about $68,000. Compare proposals with the same scope and assembly, and check that each includes equivalent insulation, tear-off, flashing, and warranty terms.
Three sample BUR replacement quotes for different roofs
These examples illustrate how area and scope affect totals. They are planning estimates rather than contractor offers, and they assume ordinary access and no major structural damage. Real proposals should be based on a site inspection and measured roof area.
| Project and scope | Unit estimate | Labor assumption | Estimated total |
|---|---|---|---|
| 2,000 sq ft, new three-ply roof over prepared surface | $7-$10/sq ft | 4-person crew, 3-5 days | $14,000-$20,000 |
| 10,000 sq ft, tear-off and standard replacement | $7-$11/sq ft | 5-person crew, 1-2 weeks | $70,000-$110,000 |
| 20,000 sq ft, tear-off, upgraded insulation, complex details | $9-$14/sq ft | 6-person crew, 2-3 weeks | $180,000-$280,000 |
The $70,000-$110,000 example is a useful comparison point for a conventional 10,000-square-foot replacement. Its rate includes removal and standard replacement but excludes major deck reconstruction, exceptional crane needs, and premium insulation specifications. The larger project has a higher rate because it includes more demanding insulation and detailing, despite its greater area.
Check whether each quote measures gross roof area or deducts openings, and whether parapets or vertical flashing are included. A low total may reflect a thinner assembly or excluded removal rather than a more efficient bid. Request the unit price for added insulation, replacement decking, and concealed wet areas so that change orders are easier to evaluate.
Can repairs or a different membrane lower the bill?
Repair may be less expensive when damage is localized and the existing roof remains dry and structurally sound. Minor BUR repairs can range from about $300-$1,500, while larger patching or flashing work may run $1,500-$5,000. A moisture survey can help identify whether the problem is limited to one area or extends beneath the surface. Repeated leaks, widespread wet insulation, or a failing deck can make full replacement more practical.
Replacing BUR with a single-ply membrane may change material and labor pricing, but there is no universal low-cost winner. EPDM can fall near $4-$9 per square foot installed, and TPO near $5-$10 per square foot, before significant tear-off or insulation work. Compatibility, fire and wind requirements, drainage, warranty terms, and the existing deck all affect the final comparison.
Compare complete roof assemblies rather than membrane prices alone. A membrane quote that omits insulation or tear-off is not directly comparable to a full BUR replacement. A professional should assess roof moisture, drainage, flashing, and building requirements before recommending an overlay, repair, or different system. Covering a wet or damaged assembly can shift costs into future leaks and repairs.
Ways to control the BUR replacement budget without cutting scope
Get at least three written bids using the same roof plan and specifications. Ask each contractor to price the same number of plies, insulation thickness, surfacing, tear-off depth, flashing details, and disposal. Include alternates for upgrades separately so the base price remains easy to compare. Confirm whether the proposal includes permits, protection, cleanup, and a workmanship warranty.
Scheduling before active leaks become an emergency can provide more time to compare bids and coordinate materials. Avoid choosing a date that conflicts with the building’s busiest operations if that would require night work or extensive phasing. If replacement is necessary, combining nearby roof areas into one mobilization may lower duplicated setup and equipment charges, provided the work can be planned without disrupting operations.
Keep the scope fixed, but do not remove necessary tear-off, insulation, drainage, or safety work simply to lower the initial quote. Ask for a documented repair allowance for deck damage rather than an unexplained contingency. If the roof has isolated sound areas, request a professional assessment of whether phased replacement is technically appropriate; an overlay or partial replacement should not be assumed suitable without checking moisture and code constraints.
Before signing, verify the contractor’s commercial roofing experience, insurance, written warranty coverage, payment schedule, and process for approving extra work. A detailed quote helps limit surprises: it should state roof area, assembly layers, insulation type and thickness, removal method, disposal, flashing scope, schedule assumptions, and unit prices for likely repairs.