Built up roof is one of the most reliable and long-lasting roofing solutions for both commercial and residential buildings. Also known as built-up roofing, this system uses multiple layers of bitumen and reinforcing fabrics to create a strong, waterproof barrier. A built up roofing system is ideal for flat or low-slope roofs, offering excellent protection against leaks, extreme weather, and wear over time.
In this article, we will explore what a built up roof is, how it works, its advantages, and why choosing USA Builders and Developers for roofing services is a smart decision.
What Is a Built Up Roof?
A built up roof, also known as built-up roofing, is a type of flat or low-slope roofing system that has been used for over a century. It is made by layering multiple sheets of bitumen (asphalt or coal tar) and reinforcing fabrics, creating a strong, durable, and waterproof roof. This layering method gives the roof its name “built up” because the roof is literally built up layer by layer.
The structure of a typical built up roofing system includes:
- Base layers: These are fiberglass or organic mats that provide structural strength.
- Bitumen layers: Asphalt or coal tar acts as a waterproofing agent.
- Top layer: Usually covered with gravel or reflective coatings to protect from UV rays and weather damage.
This multi-layer system makes built up roofing exceptionally durable and resistant to leaks, punctures, and extreme weather conditions.
How Built Up Roofing Works
The durability of a built up roof comes from its carefully designed layers. Each layer plays a key role in protecting your building.
- Base Sheet Installation: The first step is laying the base sheet over the roof deck, providing a strong foundation for the remaining layers.
- Bitumen Application: Hot asphalt or coal tar is applied over the base sheet. Reinforcing fabrics or felt sheets are embedded into the bitumen, and this layering process is repeated several times, usually three to five layers.
- Top Layer Protection: A protective layer of gravel, stones, or reflective coating is added to shield the roof from UV rays, fire hazards, and mechanical damage.
- Sealing and Finishing: All edges, seams, and penetrations such as vents and chimneys are sealed to prevent leaks, resulting in a seamless, waterproof roof system.
The result is a strong, long-lasting roof that performs well in all weather conditions.
Advantages of a Built Up Roof
Choosing built up roofing provides several benefits for homeowners and commercial property owners in Maryland.
1. Durability and Longevity
A built up roof can withstand heavy rain, snow, hail, and strong winds. With proper installation and maintenance, it can last 20–30 years or more, making it one of the most durable roofing options available.
2. Superior Waterproofing
The multiple layers of bitumen and fabric in built-up roofing create a near-impenetrable barrier against water. This is especially important for flat roofs, where water pooling is common.
3. Energy Efficiency
Many built-up roofs use reflective coatings or gravel on the top layer. These features reduce heat absorption, helping keep buildings cooler and lowering energy costs.
4. Low Maintenance
Compared to other roofing types, this roof requires minimal maintenance. Routine inspections and minor repairs by professionals like USA Builders and Developers are enough to maintain optimal performance.
5. Fire Resistance
The asphalt or coal tar layers in a built up roof provide natural fire resistance, adding an extra layer of safety for commercial and residential properties.
Built Up Roof vs Other Flat Roofing Options
Understanding the differences between built-up roofing and other flat roofing options can help property owners make an informed decision. Here’s a comparison table:
| Feature | Built Up Roof | Modified Bitumen Roof | EPDM Rubber Roof |
|---|---|---|---|
| Lifespan | 20–30 years | 15–25 years | 20–30 years |
| Waterproofing | Excellent | Good | Good |
| Maintenance | Low | Moderate | Low |
| Installation Cost | Moderate | Moderate | Lower |
| Energy Efficiency | High (with reflective coating) | Moderate | Moderate |
| Fire Resistance | High | Moderate | Low |
As the table shows, a BUR provides excellent durability, waterproofing, and fire resistance, making it a smart long-term investment for commercial and residential properties alike.
Applications of Built Up Roofing
Built up roofing is a versatile solution suitable for a variety of buildings. Common applications include:
- Commercial buildings: Office complexes, warehouses, and retail stores often benefit from the durability and low maintenance of a built-up roof.
- Residential properties: Flat or low-slope residential roofs can benefit from the waterproofing and energy efficiency of built up roofs.
- Industrial facilities: Factories and manufacturing plants need strong, durable roofs that can handle heavy machinery vibrations and extreme weather conditions.
Why Choose USA Builders and Developers for Built Up Roofing
Installing a built up roof requires professional expertise to ensure durability and waterproofing. USA Builders and Developers offers expert roofing services in Maryland, including Baltimore, Bethesda, Anne Arundel, and Montgomery counties.
Reasons to choose them include:
- Experienced Team: Over 20 years of professional roofing experience.
- High-Quality Materials: Durable bitumen, mats, and protective top layers.
- Tailored Solutions: Roofing systems customized to your building’s size, slope, and weather conditions.
- Maintenance and Repairs: Professional inspections and maintenance to extend your roof’s life.
- Customer Satisfaction: Proven reputation for reliable service and long-lasting results.
Built Up Roof Maintenance Tips
Even the most durable built-up roofing system requires basic maintenance to ensure long-term performance.
- Regular Inspections: Check the roof at least twice a year, and after storms.
- Remove Debris: Keep leaves, branches, and dirt off the roof to prevent water pooling.
- Check Seams and Flashings: Inspect edges, seams, and penetrations to prevent leaks.
- Prompt Repairs: Address small cracks or punctures immediately.
- Professional Maintenance: Hire experts like USA Builders and Developers for thorough inspections and repairs.
Cost Considerations for Built Up Roofing
The cost of a built-up roofs depends on the roof size, number of layers, materials, and labor. Although the upfront cost is higher than some alternatives, the long-term durability, energy efficiency, and low maintenance make it a cost-effective choice.
| Cost Factor | Typical Price Range (USD) |
|---|---|
| Materials (per sq. ft.) | $3–$7 |
| Labor (per sq. ft.) | $4–$8 |
| Total Installation (2,000 sq. ft.) | $14,000–$30,000 |
| Maintenance (annual) | $200–$500 |
Final Thoughts
A built up roof is a durable, energy-efficient, and reliable roofing solution for commercial and residential buildings. Its layered construction provides excellent waterproofing, fire resistance, and long-term performance. Property owners in Maryland can rely on USA Builders and Developers for expert installation, maintenance, and repair of built-up roofing systems.
Choosing a built up roof means investing in a roofing system that protects your building for decades, reduces maintenance costs, and provides peace of mind, making it one of the smartest choices for your property.
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