Built-Up Roofing (BUR): Cost, Lifespan & Complete Guide (2025)
Built-Up Roofing (BUR) is the oldest and most proven flat roofing system, consisting of multiple layers of bitumen (asphalt or coal tar) alternating with reinforcing fabrics (plies) and topped with a protective surface of gravel or mineral cap sheet. BUR systems are extremely durable and waterproof, making them a staple of commercial roofing for over a century.
Avg. Cost/Sq Ft
$7.00
Avg. Cost/Square
$700
Typical Lifespan
30 yrs
Full cost range: $5.00 - $10.00 per sq ft($500 - $1000 per roofing square)
Pros & Cons of Built-Up Roofing (BUR)
Advantages
- Proven system with 100+ year history
- Excellent waterproofing (multiple redundant layers)
- Gravel surface provides UV protection and fire resistance
- Good for high foot-traffic areas
- Seamless when properly installed
- Low maintenance requirements
Disadvantages
- Strong odors during hot-applied installation
- Heavy system — may need structural reinforcement
- Difficult to locate leaks in multi-layer system
- Not environmentally friendly
- Limited to flat/low-slope applications
- More expensive than single-ply options
Who Should Choose Built-Up Roofing (BUR)?
Commercial buildings and large flat roofs requiring proven, heavy-duty waterproofing. Ideal for roofs with heavy foot traffic or rooftop equipment.
Types of Built-Up Roofing (BUR)
3-Ply BUR
$5.00-$7.00/sq ft20-25 years
Standard commercial application.
4-Ply BUR
$6.00-$8.50/sq ft25-35 years
Enhanced durability with additional layer.
5-Ply BUR
$7.50-$10.00/sq ft30-40 years
Maximum protection for critical applications.
Built-Up Roofing (BUR) vs. Other Materials
| Material | Avg. Cost/Sq Ft | Lifespan |
|---|---|---|
| Built-Up Roofing (BUR) | $7.00 | 30 years |
| Asphalt Shingles | $4.50 | 20 years |
| Metal Roofing | $9.50 | 50 years |
| Tile Roofing | $12.00 | 75 years |
| Slate Roofing | $18.00 | 125 years |
| Wood Shake & Shingles | $9.00 | 30 years |
| TPO Roofing | $6.50 | 20 years |
| EPDM Rubber Roofing | $5.50 | 25 years |