Commercial Built-Up Roofing (BUR) in Denver, CO | Installation, Replacement & Repair | Durable Flat Roof Solutions by Denver Premier Commercial Roofing
Denver Premier Commercial Roofing offers expert Commercial Built-Up Roofing (BUR) with over 20 years of experience delivering durable flat roof solutions across Denver, CO. BUR systems, often called “tar and gravel roofs,” are constructed with multiple layers of bitumen and reinforcing fabrics, creating a thick, resilient barrier designed to withstand heavy foot traffic, extreme temperature fluctuations, and hailstorms common in Colorado. These multi-ply roofs provide excellent waterproofing and UV protection, with service lifespans typically ranging from 25 to 40 years when installed with high-quality asphalt, coal tar, or modified bitumen products. With excellent fire resistance ratings and strong puncture resistance, BUR is ideal for warehouses, schools, hospitals, and commercial buildings that demand long-lasting performance.
Our services cover new installation, complete replacement, and targeted repairs, with each project tailored to the building’s structure and local climate. We utilize premium materials from trusted manufacturers like GAF and IKO Roofing to ensure maximum durability and energy efficiency. From reinforcing base sheets and installing multiple asphalt layers to applying reflective gravel surfacing that can lower rooftop temperatures by 20–30°F, our certified crews follow strict quality and safety protocols. Denver Premier Commercial Roofing combines technical expertise, superior materials, and proactive maintenance strategies to deliver BUR solutions that protect your property and investment year-round.
Denver Premier Commercial Roofing provides Commercial Built-Up Roofing (BUR) to surrounding Denver, CO cities including Aurora, Lakewood, Thornton, Arvada, Westminster, Centennial, Englewood, Littleton, Broomfield, Commerce City and more.
Why Are We The Best Commercial Built-Up Roofing (BUR) Company in Denver, CO?
- 20+ years of industry experience
- Verified Success
- Certified Professionals & Trusted Manufacturers
- Clear, Transparent Pricing
- Fast Emergency Service
- Experienced, Vetted Teams
- Premium Materials & Superior Craftsmanship
- Long-Term Warranties & Ongoing Support
- Safety-First & Code-Compliant
- Tailored Solutions & Energy Efficiency
- Local Expertise & Permitting Assistance
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Our Commercial Built-Up Roofing (BUR) Services
BUR Roof Installation
Professional installation of multi-ply BUR systems using alternating layers of bitumen (asphalt or coal tar) and reinforcing fabrics such as fiberglass or organic felts. These systems typically include 3–5 plies, creating redundant waterproofing layers that continue protecting the building even if one layer is compromised. BUR roofs have been used for over 100–150 years, making them one of the most time-tested commercial roofing systems in the U.S.
BUR Roof Replacement (Tear-Off & Retrofit)
Full removal of existing roofing materials down to the deck, followed by installation of a new BUR system. Replacement often includes upgraded insulation and modern materials, improving thermal performance and extending lifespan to 25–40 years. Tear-offs typically involve removing multiple layers of felt, bitumen, and aggregate before rebuilding a fully code-compliant system.
BUR Roof Repair
Targeted repairs address issues like blistering, cracking, flashing failure, and gravel displacement. BUR systems are uniquely repairable using compatible materials like hot asphalt, cold-applied adhesives, and patching felts. Because of their layered design, repairs can restore waterproofing without replacing the entire system—saving up to 30–50% compared to full replacement in many cases.
BUR Roof Maintenance Programs
Scheduled maintenance services include semi-annual inspections, debris removal, gravel redistribution, and resealing flashings. Proactive maintenance helps prevent small issues—like blisters or splits—from escalating, extending roof life by up to 20–30%. Regular upkeep is critical since BUR systems rely on intact multiple layers for maximum performance.
Additional Commercial BUR Roofing Services
BUR Roof Inspection & Leak Detection
Comprehensive inspections evaluate ply integrity, flashing details, drainage systems, and membrane condition. Since BUR roofs rely on layered redundancy, leaks often occur when multiple plies are compromised—most commonly at penetrations and seams. Advanced diagnostics help detect moisture beneath the surface, preserving insulation performance and preventing structural damage.
BUR Roof Coatings & Surfacing
Application of reflective coatings, asphalt emulsions, or gravel surfacing to protect the membrane from UV radiation and weathering. Gravel surfacing can provide 100% UV protection while also improving fire resistance with non-combustible materials. Reflective coatings can reduce rooftop temperatures and improve energy efficiency, especially on large commercial buildings.
BUR Roof Insulation & Tapered Systems
Installation of insulation layers (such as polyiso or fiberboard) beneath BUR membranes to improve thermal resistance and drainage. Proper insulation design can reduce energy consumption by 10–20% and prevent ponding water by incorporating tapered systems with slopes like 1/4" per foot, which is critical for long-term durability.
BUR Flashing & Waterproofing Details
Custom installation and repair of flashing around roof penetrations, HVAC units, parapet walls, and edges. Since more than 80% of commercial roof leaks occur at transitions and penetrations, properly installed BUR flashing—using reinforced felts and bitumen—is essential for maintaining a watertight system.
Our Commercial BUR Roofing Installation Process
Step 1: Roof Deck Preparation & Tear-Off
The process begins by removing existing roofing materials and inspecting the structural deck (steel, concrete, or wood). Moisture detection and repairs are critical—trapped moisture can reduce insulation performance by up to 50%. Proper preparation is essential, as studies show poor substrate conditions contribute to nearly 40% of premature roof failures.
Step 2: Base Sheet Installation
A base sheet (typically fiberglass or organic felt) is mechanically fastened or adhered to the deck, creating a smooth, stable foundation. This first layer acts as an initial waterproofing barrier and helps prevent cracks and splits. It also ensures proper adhesion for subsequent layers, which is critical for long-term system integrity.
Step 3: Hot Bitumen Application (Asphalt or Coal Tar)
Hot-applied bitumen—usually oxidized asphalt or coal tar—is heated in kettles to temperatures exceeding 400°F and applied using mops or mechanical spreaders. Bitumen serves as the primary waterproofing agent, bonding all layers together into a continuous membrane that adapts to building movement and thermal expansion.
Step 4: Multi-Ply Layering (3–5 Layers)
Reinforcing felts (fiberglass or polyester mats) are embedded into the hot bitumen in alternating layers, creating a 3–5 ply system. Each additional ply increases durability, puncture resistance, and redundancy—meaning if one layer fails, others still protect the building. This layered construction is why BUR systems can last 25–40+ years under proper maintenance.
Step 5: Flashing & Waterproofing Details
Critical areas such as penetrations, HVAC curbs, parapet walls, and edges are sealed with reinforced flashing using bitumen and fabric. Since over 80% of roof leaks occur at transitions and penetrations, this step is essential for long-term watertight performance. Proper flashing also improves wind uplift resistance and prevents water infiltration at vulnerable نقاط.
Step 6: Flood Coat & Protective Surfacing (Gravel or Coating)
A final “flood coat” of asphalt is applied, followed by protective surfacing such as gravel, slag, mineral granules, or reflective coatings. Gravel can provide near 100% UV protection while also adding weight to resist wind uplift. Reflective coatings can lower roof surface temperatures by 20–30°F, improving energy efficiency and extending membrane life.
Step 7: Final Inspection, Quality Assurance & Maintenance Planning
After installation, a comprehensive final walkthrough ensures the entire BUR system meets performance and code standards. Contractors inspect ply adhesion, flashing integrity, drainage performance, and surface coverage (gravel or coating consistency). Quality checks often include seam probing and visual inspections to confirm there are no voids, blisters, or exposed bitumen—issues that can shorten roof life by up to 20–30% if left unaddressed.
This step also includes documenting the roof condition and establishing a maintenance plan. Scheduled maintenance—typically twice per year—can extend a BUR roof’s lifespan by up to 30% and significantly reduce lifecycle costs. Many contractors also finalize warranty documentation at this stage, ensuring both workmanship and manufacturer coverage are in place for long-term protection.
Why Choose Us for Commercial Built-Up (BUR) Roofing in Denver?
Commercial BUR Roofing FAQs
A properly installed BUR (built-up roofing) system typically lasts 25–40+ years, depending on the number of plies and maintenance frequency. Systems installed with high-quality materials from manufacturers like GAF are designed for long-term durability, especially when paired with routine inspections and upkeep.
BUR systems consist of multiple layers of bitumen (asphalt or coal tar) alternated with reinforcing fabrics such as fiberglass or organic felts. These are topped with a protective surface like gravel, slag, or mineral granules. Most systems include 3–5 plies, creating a thick, redundant waterproof membrane.
BUR roofing can be energy efficient when paired with reflective coatings or light-colored gravel. Reflective surfacing can reduce roof temperatures by 20–30°F, lowering cooling costs by 10–15%. Systems can also meet standards set by ENERGY STAR when designed with reflective materials.
BUR roofs are highly resistant to hail and heavy foot traffic due to their multi-layer design and gravel surfacing. The thick membrane helps absorb impact, reducing the risk of punctures compared to single-ply systems. This makes BUR especially effective in regions prone to hailstorms and temperature swings.
BUR repairs involve removing damaged sections and applying new layers of bitumen and reinforcing felts to restore waterproofing. Because of the system’s layered design, repairs can often be localized—saving 30–50% compared to full replacement while maintaining performance.
Yes, many BUR systems can be restored if the underlying layers are still structurally sound. Restoration typically involves applying asphalt-based emulsions or reflective coatings over the existing surface, along with repairing damaged areas and reinforcing weak نقاط. This process can extend the roof’s lifespan by 10–15 years and reduce costs by 40–60% compared to full replacement. Restoration also improves UV resistance and can lower roof surface temperatures by 20–30°F, enhancing overall energy efficiency and performance.
Yes, BUR systems often incorporate insulation layers such as polyisocyanurate (polyiso) or perlite boards. Polyiso provides R-values of approximately 5.6–6.5 per inch, improving thermal performance and reducing building energy consumption by 10–20% when properly installed.
BUR systems offer excellent fire resistance, especially when surfaced with gravel or mineral materials. Many systems achieve Class A fire ratings, the highest level of fire protection, making them suitable for commercial and industrial buildings requiring enhanced safety.
Yes, maintenance is essential for maximizing lifespan. Semi-annual inspections and minor repairs can extend a BUR roof’s life by up to 20–30%. Maintenance typically includes checking flashings, redistributing gravel, and sealing small cracks or blisters before they worsen.