For commercial property owners looking for time-tested performance, few materials compare to the reliability of a built up roof. Often called BUR, this system has been protecting flat and low-slope roofs for more than a century. It combines multiple layers of asphalt and reinforcing fabric topped with gravel or a reflective coating, creating a watertight and durable surface built to last.
- Proven protection: Built up roofs withstand heavy foot traffic and harsh weather.
- Cost efficiency: Offers long-term value through low maintenance and repair costs.
- Flexible design: Works well on office buildings, warehouses, and retail facilities.
What Is a Built Up Roof System?
A built up roof (BUR) is a multi-layered system designed for flat or low-slope commercial roofs. It consists of alternating layers of bitumen (asphalt or coal tar) and reinforcing fabric, often fiberglass or polyester. The final surface is topped with gravel, stone, or a reflective coating to protect against UV rays and weathering.
In Arlington and surrounding areas, where seasonal storms and temperature swings are common, built up roofs remain a popular choice. Their layered structure provides excellent waterproofing and impact resistance, making them ideal for commercial buildings that experience frequent rooftop activity or heavy equipment placement.
How Built Up Roofs Are Installed
Before installation begins, contractors inspect the roof deck for damage and ensure proper slope and drainage. The BUR system is then applied in layers to achieve maximum durability and leak protection.
Step 1: Base Layer Installation
A vapor barrier or base sheet is applied directly to the roof deck to protect insulation and prevent moisture infiltration.
Step 2: Bitumen Application
Heated asphalt or cold-applied bitumen is spread evenly to bond with the reinforcement layers. The number of plies, typically three to five, determines overall thickness and performance.
Step 3: Reinforcement Layer
Fiberglass or polyester mats are embedded into the bitumen to strengthen the membrane and improve flexibility.
Step 4: Surfacing
The top layer can be finished with gravel, mineral granules, or a reflective coating to provide UV protection and reduce thermal stress.
Proper installation is key to longevity. An experienced roofing contractor ensures even layer thickness, tight seams, and appropriate drainage.
Benefits of Built Up Roof Systems
Built up roofs have stood the test of time because of their durability and versatility. Here’s why many Virginia property managers continue to rely on them.
- Long lifespan: With proper care, BUR systems can last 25 to 40 years.
- Superior waterproofing: Multiple bitumen layers form a seamless, watertight barrier.
- Fire resistance: The gravel or mineral surface helps slow flame spread.
- Low maintenance: Repairs are straightforward and infrequent.
- UV and weather protection: Reflective coatings and gravel prevent sun and storm damage.
- Cost-effective over time: Though initial installation may cost more than some single-ply options, long-term performance offsets the expense.
For flat roof structures across Arlington and surrounding areas, BUR provides dependable performance even under challenging weather conditions.
Built Up Roof vs. Other Flat Roof Systems
Understanding how BUR compares to other commercial roof types can help you make a more informed decision.
| Roof System | Installed Cost per Sq. Ft. | Typical Lifespan | Maintenance Needs |
| Built Up Roof (BUR) | $4.00–$8.50 | 25–40 years | Low |
| Modified Bitumen | $4.50–$8.00 | 20–30 years | Moderate |
| EPDM (Rubber) | $4.00–$8.00 | 15–25 years | Low |
| TPO | $5.00–$9.00 | 20–30 years | Low |
| PVC | $6.00–$12.00 | 20–35 years | Low |
While single-ply systems such as TPO and PVC are lighter and faster to install, BUR remains unmatched in multilayer strength and proven performance history.
Maintenance Tips for Built Up Roofs
Routine maintenance helps ensure that a built up roof continues performing as designed. While these systems are known for durability, regular inspections are essential to prevent small issues from turning into costly repairs.
- Inspect semiannually: Check for cracks, blisters, or areas where gravel has worn thin.
- Keep drains clear: Standing water accelerates deterioration and adds stress to the roof deck.
- Monitor flashing and seams: Reseal joints around penetrations, vents, and parapets as needed.
- Watch for surface damage: Heavy foot traffic or equipment can displace gravel and expose layers.
- Recoat periodically: Reflective coatings should be refreshed every 5 to 7 years to maintain UV resistance.
- Repair punctures promptly: Address leaks or exposed areas early to avoid deeper water intrusion.
A preventive maintenance plan tailored to your property’s roof size and use can extend its service life significantly.
5 Signs Your Built Up Roof May Need Attention
BUR systems are durable, but they still require occasional care. Look for these warning signs that it’s time for inspection or repair.
- Blisters or bubbles on the surface from trapped moisture.
- Loose or missing gravel exposing the bitumen layer.
- Ponding water that lasts more than 48 hours.
- Cracked or brittle sections from age or UV exposure.
- Interior water stains near ceiling edges or HVAC units.
If any of these issues appear, scheduling a professional evaluation helps determine whether repairs or resurfacing are necessary.
Common Repairs for Built Up Roofs
Most BUR repairs can be completed quickly and affordably if addressed early.
- Patching blisters: Roofing professionals cut and reseal affected areas with hot asphalt.
- Adding gravel or coating: Re-surfacing improves protection and extends lifespan.
- Repairing flashing: Reinforcing or resealing edges prevents water infiltration.
- Replacing damaged sections: Small localized replacements can restore integrity without full replacement.
Prompt maintenance reduces overall lifecycle costs and prevents widespread damage.
Environmental Benefits of Built Up Roofs
Modern BUR systems can be environmentally friendly when properly maintained. Many manufacturers now offer low-VOC bitumen and reflective coatings that reduce heat absorption and cooling costs. Additionally, gravel or light-colored coatings improve energy efficiency by reflecting sunlight, which is especially beneficial during Virginia’s warm summers.
Some BUR systems also qualify for ENERGY STAR® ratings, making them an appealing choice for property owners pursuing sustainable building practices.
Cost and Longevity in Virginia
In Virginia, a typical built up roof installation costs between $4.00 and $8.50 per square foot, depending on layer count, insulation, and surface material. Most commercial BUR systems last 25 to 40 years with consistent maintenance.
For buildings in Arlington and surrounding areas, local labor rates and accessibility factors such as rooftop equipment, slope, or height can affect total project cost. While BUR systems may require a slightly higher initial investment than single-ply alternatives, they offer exceptional long-term durability and lower maintenance expenses.
Why Built Up Roofs Remain a Top Choice for Businesses
Commercial property owners continue to choose BUR because it offers peace of mind. The multi-ply design delivers redundancy, meaning that if one layer becomes compromised, others continue to protect the building. The gravel or coated surface resists hail and UV damage, while the robust base prevents leaks that can interrupt business operations.
For flat-roofed commercial buildings such as warehouses, schools, and medical centers, this reliability makes BUR one of the most trusted solutions available.
Proven Protection for Commercial Properties
A built up roof remains a strong choice for businesses seeking a durable, low-maintenance roofing system with decades of proven success. Its layered construction, excellent waterproofing, and cost-efficient maintenance make it an ideal fit for commercial properties throughout Virginia.
If your facility in Arlington or surrounding areas needs expert evaluation, reach out to Springfield Roofing & Sheet Metal for professional guidance. Our experienced team can assess your existing roof, recommend the right maintenance plan, and ensure your investment performs for decades to come.
