Built-up roofing (BUR) typically costs $5-$10 per square foot installed, or about $5,000-$10,000 for a 1,000-square-foot roof. Final pricing depends on roof size and access, the number of asphalt-and-felt plies, insulation, local labor rates, and whether an old roof must be removed.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Installed BUR | $5 per sq ft | $7.50 per sq ft | $10 per sq ft | Typical replacement over a sound deck with standard materials |
| 1,000-sq-ft roof | $5,000 | $7,500 | $10,000 | Installation, standard flashing, and ordinary access |
| Tear-off and disposal | $1 per sq ft | $2 per sq ft | $3 per sq ft | Added when existing roofing must be removed |
| Roof insulation | $1 per sq ft | $2.50 per sq ft | $5 per sq ft | Cost varies with thickness and insulation type |
What a typical built-up roof costs to install
For a straightforward low-slope roof, a contractor may quote $5-$10 per square foot for a complete BUR installation. That equals $5,000-$10,000 for 1,000 square feet and $10,000-$20,000 for 2,000 square feet. A simple roof with easy access and a sound deck falls near the low end; complex edges, multiple penetrations, or premium specifications can push the price higher.
Installed pricing commonly includes asphalt, reinforcing felts, surfacing, standard flashing work, and labor. The estimate may not include tear-off, deck repairs, added insulation, permits, or unusual drainage work, so the written scope matters. A low bid may assume fewer plies or omit details another contractor includes.
A practical planning allowance is about $7-$9 per square foot for a standard replacement before major deck repairs or extensive tear-off. Actual bids vary by region, roof geometry, building use, and local code requirements. Assumptions: U.S. commercial-style low-slope roof, standard BUR materials, normal access, and no major structural repairs.
How asphalt plies, labor, and tear-off shape the quote
BUR is assembled from alternating layers of bitumen and reinforcing fabric, often finished with gravel or another protective surface. The quote combines materials with crew time and job-specific charges. Asphalt application and careful detailing take more work than simply measuring the roof area, particularly around drains, curbs, parapets, and rooftop equipment.
| Quote component | Typical price | What changes the charge | Usually included |
|---|---|---|---|
| BUR materials | $2-$4 per sq ft | Number of plies, asphalt type, and surfacing | Felts, bitumen, and standard cap or gravel layer |
| Installation labor | $2-$4 per sq ft | Roof access, detailing, crew size, and job duration | Layering, application, and standard flashing labor |
| Tear-off and disposal | $1-$3 per sq ft | Existing layers, disposal rates, and hauling distance | Removal and disposal of specified roofing layers |
| Insulation and cover board | $1-$5 per sq ft | Thickness, material, and code or energy requirements | Only when listed in the bid scope |
| Flashing and detail work | $5-$15 per linear ft | Parapet length, penetrations, and metal selection | May be priced separately from field roofing |
Contractors may price the entire assembly as one square-foot rate or separate labor, materials, and removal. For labor-only comparisons, rates commonly work out to about $50-$100 per worker-hour, though roofing bids are usually quoted by area or as a project total.
Compare what each quote includes before comparing its total. Confirm the number of plies, insulation, flashing, tear-off, disposal, and any warranty charges. Clarify whether taxes, permits, and deck repairs are included or billed as extras.
Which roof size and BUR specifications change the price?
Roof area is the first major driver, but price per square foot does not always decline in a straight line as the roof gets larger. A small project can carry a higher unit price because mobilization, equipment setup, and safety measures are spread across fewer square feet. Larger roofs may earn a lower unit rate, yet their total remains higher and their drainage or access needs can add cost.
The number of reinforcing plies also matters. A three-ply assembly may cost less than a four- or five-ply build-up, while more plies can add material and installation time. Specification, rather than the name “BUR” alone, determines the assembly. Ask for the specified ply count and surfacing in writing; the same roof area can produce substantially different bids with different designs.
Insulation thickness is another measurable cost driver. Adding roughly 1-2 inches of rigid insulation may add about $1-$3 per square foot, while thicker or higher-performance assemblies can add more. Drainage slopes, tapered insulation, and cover boards can also raise the material and labor allowance.
Penetrations and perimeter details become more consequential when a roof has dozens of curbs, drains, or vents instead of a few simple openings. Parapets and flashing are often priced by linear foot, and complex details may add $5-$15 per foot or more. Deck damage discovered after tear-off can require repairs billed separately, often around $3-$10 per square foot of affected area depending on the deck type and repair extent.
Pitch, height, and access affect safe material handling. A low-slope roof with an unobstructed loading area is generally simpler than a tall building with limited staging space or restricted equipment access. These conditions can increase crew hours, crane or hoisting charges, and project duration.
Regional labor rates and access create different U.S. bids
Roofing labor and disposal charges differ by location. Large metropolitan areas and regions with high construction wages may price a BUR project roughly 10%-25% above a lower-cost market. Rural areas can have lower hourly rates but higher mobilization or delivery charges when qualified crews and suppliers are farther away.
Weather and local construction demand also affect availability. A busy season can lead to longer scheduling waits and less flexibility on price, while a building that needs immediate water protection may require premium scheduling. These variations are reasons to compare local written bids rather than apply one national rate to every property.
For a rough location-based comparison, a standard $7.50-per-square-foot estimate might fall near $6.75-$8.25 per square foot in a market around 10% below or above that reference. At a 25% premium, the same scope could approach $9.40 per square foot. These are planning adjustments, not guaranteed local prices; urban access, labor supply, and disposal rules can shift the result.
Use a same-scope local comparison, not a national average alone. Ask contractors to state whether travel, roof loading, disposal fees, and local permit costs are included, especially when the property is outside a major service area.
How many crew hours does a BUR installation take?
A 1,000-square-foot roof with straightforward access may take a small crew about 2-4 working days, depending on tear-off, weather, drying or application requirements, and detailing. A 2,000-square-foot project may take roughly 3-6 days; extra layers, difficult access, or substantial flashing work can extend the schedule. These are broad job-duration estimates, not a promise of continuous workdays.
A roofing crew may include several installers, with the team size adjusted to the roof area and method of moving materials. Labor expense reflects not only time laying the plies but also setup, perimeter protection, material handling, cleanup, and detail work. A quote that assumes fast production should still explain how penetrations and transitions will be completed.
Rain, cold temperatures, or wind can interrupt work and expose the building to schedule risk. Contractors may need to sequence removal and installation so the roof remains protected overnight. Ask how temporary waterproofing is handled and whether weather-related delays change the price.
Project duration and labor cost rise when the roof cannot be loaded or worked efficiently. Confirm crew size, expected workdays, working hours, staging requirements, and whether the estimate includes temporary protection. Those details help explain differences between bids that otherwise show similar unit rates.
When tear-off, deck repairs, and roof details add charges
Removing an existing BUR roof commonly adds $1-$3 per square foot, with the actual rate depending on the number of layers, how material is handled, and local disposal fees. Multiple old layers may require more labor and create heavier debris loads. Some jurisdictions restrict how many roofing layers can remain, making removal a code or permit requirement rather than an optional upgrade.
Deck repairs are difficult to price accurately before the old roof is opened. Contractors may list a unit rate for replacement sheathing, metal deck work, or other repairs, then bill against an approved quantity. Request an allowance or written approval process so unexpected damage does not become an open-ended charge.
Drains, scuppers, rooftop units, skylights, and parapet walls need careful tie-ins. Replacing a drain or rebuilding a curb can add roughly $150-$600 per item, depending on access and the extent of plumbing or carpentry work. Flashing replacement may be included, excluded, or limited to specific areas, so the estimate should define the scope.
Ask for separate line items for tear-off, disposal, drainage, flashing, and deck repair. This makes the base installation rate easier to assess and helps the owner identify which extras are known, optional, or dependent on concealed conditions.
BUR compared with modified bitumen and single-ply roofing
Modified bitumen often costs about $4-$9 per square foot installed, depending on attachment method, surfacing, and roof details. It uses bitumen-based sheets and may require fewer layers than a traditional built-up assembly. It can be a lower-cost alternative for some low-slope roofs, though building specifications, fire ratings, and contractor availability affect suitability.
Single-ply membranes such as EPDM, TPO, or PVC commonly fall around $4-$10 per square foot installed. The material and installation method vary: membrane thickness, fastening, insulation, seams, and perimeter details all affect the bid. The lowest initial price is not necessarily comparable if it includes a different insulation package or excludes old-roof removal.
BUR may be chosen where a multi-layer assembly and gravel or other surfacing meet the building’s needs. Its heavier build-up can affect loading, and hot-applied work may not suit every occupied site or specification. A contractor should verify deck capacity and fire-safety procedures where applicable.
Compare complete roof assemblies rather than headline rates. Match insulation, tear-off, flashing, warranty, and drainage scope across BUR and alternatives. A $6-per-square-foot membrane bid and an $8-per-square-foot BUR bid cannot be judged fairly if the former excludes removal or has a different thermal specification.
Three BUR quote examples for different roof scopes
A small, accessible 600-square-foot garage roof with a sound deck and a basic three-ply assembly might receive a quote near $6.50-$8 per square foot, or about $3,900-$4,800. A small job can have a higher per-square-foot rate than a larger roof because mobilization and setup are spread over less area. This example assumes no tear-off or insulation replacement.
A 1,500-square-foot commercial roof with a standard assembly, ordinary flashing, and one existing layer to remove might price at $7.50-$10 per square foot for installation plus $1-$2 per square foot for tear-off. The estimated total would be about $12,750-$18,000 before repairs, permits, or unusually complex drainage work.
A 3,000-square-foot roof with upgraded insulation, multiple rooftop units, and difficult material access could land around $9-$14 per square foot, or $27,000-$42,000. The higher range reflects added insulation, detail labor, and access needs; a site inspection is especially important before relying on this planning estimate.
Use these examples to check the arithmetic, not as substitutes for a site-specific quote. Each contractor should state roof area, assembly, unit rate, excluded work, and the price for likely extras. A measured estimate is more useful than a total based only on approximate building dimensions.
Lower the BUR price by controlling scope and timing
Request at least three bids with the same roof area, ply count, insulation thickness, surfacing, flashing scope, and tear-off assumptions. A comparison table can reveal whether a lower total comes from a genuinely better rate or from omitted work. Ask each bidder to identify the unit price for added deck repairs and any extra roofing layers.
Choose materials and specifications that meet the building’s code and performance requirements without adding unneeded upgrades. Do not reduce ply count or insulation solely to lower the quote without checking the design, warranty terms, and local requirements. The less expensive specification should still be an approved assembly for the building.
Where the existing roof is sound and regulations permit, ask a qualified contractor whether an overlay is allowed instead of full tear-off. Avoiding removal can save roughly $1-$3 per square foot, but trapped moisture, poor adhesion, excess roof layers, or damaged decking can make an overlay unsuitable. A roof inspection should determine whether the savings are realistic.
Prepare access to the work area by coordinating vehicle staging, roof access, and removal of obstructions when safe and practical. Schedule non-urgent work before an emergency leak forces rush labor or temporary protection. Bundling nearby roof areas may also reduce repeated setup charges, although the contractor should show the savings clearly.
The most reliable savings come from a tightly defined scope, sound scheduling, and avoiding work the roof does not need. Keep a contingency of about 5%-10% for concealed deck damage or other discoveries, and require approval before work outside the contract proceeds.