Commercial Asphalt Roof
Commercial asphalt roofing sets the stage for a comprehensive exploration of a vital aspect of building infrastructure. This guide delves into the diverse world of commercial asphalt roofs, examining their various types, installation processes, advantages, and disadvantages. We will explore the lifecycle costs, maintenance requirements, and environmental impact, offering a balanced perspective for those involved in commercial construction and property management.
From the initial selection of materials—including built-up roofing (BUR), modified bitumen, and shingles—to the intricacies of installation and long-term maintenance, we aim to provide a clear and accessible understanding of commercial asphalt roofing systems. We will also compare asphalt roofing to other popular commercial roofing options, helping you make informed decisions based on your specific needs and budget.
Commercial Asphalt Roofing: A Comprehensive Guide
Commercial asphalt roofing systems represent a significant portion of the roofing market, offering a balance of cost-effectiveness, durability, and ease of installation. This guide provides a detailed overview of commercial asphalt roofing, encompassing its various types, installation processes, advantages, disadvantages, maintenance requirements, cost considerations, and environmental impact. We will also explore a hypothetical project to illustrate practical applications.
Introduction to Commercial Asphalt Roofing Systems
Source: freemangeneralcontracting.com
Commercial asphalt roofing systems are widely used due to their affordability and relatively straightforward installation. They consist of several layers designed to protect buildings from the elements. Key materials include asphalt, which provides waterproofing, and various reinforcing layers for strength and durability. The specific composition and layering vary depending on the type of system.
Several types of commercial asphalt roofing materials exist, each with its characteristics:
- Built-Up Roofing (BUR): This traditional system involves multiple layers of asphalt felt saturated with bitumen, alternating with layers of hot asphalt. It’s known for its durability and resistance to ponding water.
- Modified Bitumen Roofing: This system uses polymer-modified bitumen, enhancing flexibility and durability compared to standard BUR. It’s often applied using a torch or heat-welding process.
- Asphalt Shingles: While less common for large commercial applications, asphalt shingles are sometimes used on smaller commercial buildings or for specific sections of a roof. They are relatively easy to install but generally have a shorter lifespan than BUR or modified bitumen.
Lifespans vary significantly depending on the material, climate, and maintenance. BUR systems can last 20-30 years with proper maintenance, while modified bitumen can last 15-25 years, and asphalt shingles typically last 15-20 years.
Commercial Asphalt Roof Installation Process
Source: roofingbylandmark.com
The installation of a commercial asphalt roof is a multi-step process requiring skilled labor. Proper installation is crucial for longevity and leak prevention.
- Preparation: This involves inspecting the existing roof deck, removing any debris, and ensuring the surface is clean and dry.
- Base Layer: Installing a base layer, typically a waterproof membrane, provides an additional barrier against moisture.
- Insulation (if needed): Adding insulation improves energy efficiency and reduces heating and cooling costs.
- Application of Asphalt Layers: This involves carefully applying layers of asphalt felt and hot asphalt (for BUR) or modified bitumen (for modified bitumen roofing). Each layer is rolled out and secured to ensure a continuous, watertight seal.
- Flashing Installation: Flashing, typically made of metal, is installed around penetrations (pipes, vents, etc.) to prevent leaks.
- Final Layer: A final layer of surfacing material, such as gravel or cap sheet, protects the underlying layers from UV damage and wear.
Best practices include using quality materials, adhering to the manufacturer’s specifications, and employing experienced roofing contractors. Proper ventilation is also crucial to prevent moisture buildup.
| Roofing Type | Installation Time (approx.) | Cost per Square Foot (approx.) | Advantages |
|---|---|---|---|
| Built-Up Roofing (BUR) | 5-7 days (for a medium-sized building) | $5-$15 | Durable, water resistant, long lifespan |
| Modified Bitumen | 3-5 days (for a medium-sized building) | $7-$18 | Flexible, durable, and easier installation than BUR |
| Asphalt Shingles | 2-3 days (for a smaller building) | $3-$8 | Cost-effective, easy installation |
Advantages and Disadvantages of Commercial Asphalt Roofing
Source: lowes.com
Commercial asphalt roofing offers several compelling advantages, but it also has limitations.
Advantages:
- Cost-effectiveness: Generally less expensive than other roofing systems.
- Durability: Provides reliable protection against the elements for a considerable lifespan.
- Ease of Installation: Relatively quick and straightforward installation process.
- Widely Available: Materials and contractors are readily available in most regions.
Disadvantages:
- Susceptibility to damage from extreme weather: Can be vulnerable to hail, high winds, and extreme temperature fluctuations.
- Shorter lifespan compared to other systems: Compared to TPO or metal roofing, asphalt roofing has a shorter lifespan.
- Maintenance requirements: Regular maintenance is necessary to extend its lifespan.
Comparison with other roofing options:
- TPO (Thermoplastic Polyolefin): More expensive than asphalt but offers a longer lifespan and better reflectivity.
- EPDM (Ethylene Propylene Diene Monomer): Similar in cost to modified bitumen, offering good durability and flexibility.
- Metal Roofing: More expensive than asphalt but boasts exceptional longevity and durability, often exceeding 50 years.
Maintenance and Repair of Commercial Asphalt Roofs
Source: aabroof.com
Regular maintenance is key to prolonging the lifespan of a commercial asphalt roof and preventing costly repairs. A proactive approach is far more economical than reactive repairs.
- Regular Inspections: Conduct thorough inspections at least twice a year, after winter and before the start of the rainy season, checking for signs of damage.
- Cleaning: Remove debris such as leaves, branches, and dirt to prevent water retention and damage.
- Seam Inspection: Carefully examine seams for any signs of cracking, separation, or lifting.
- Drainage Check: Ensure gutters and downspouts are clear and functioning correctly to prevent water damage.
Common problems include punctures, leaks, blisters, and granule loss. Punctures and leaks require immediate attention to prevent further damage. Blisters, often caused by moisture buildup, should be addressed promptly to avoid more serious problems. Granule loss can indicate aging and potential vulnerability to UV damage.
Repair methods depend on the type and extent of damage. Minor repairs might involve patching or sealing, while more significant damage may necessitate replacing sections of the roofing system.
Cost Considerations for Commercial Asphalt Roofing
Source: americanroofingnow.com
The total cost of a commercial asphalt roofing project encompasses several factors. A detailed breakdown is essential for accurate budgeting.
The total cost includes materials, labor, permits, and potentially other associated costs like debris removal and site preparation.
| Cost Item | Price Range (Low) | Price Range (High) | Factors Affecting Cost |
|---|---|---|---|
| Materials | $2-$8 per square foot | $10-$20 per square foot | Type of asphalt roofing, quantity of materials needed, material quality |
| Labor | $3-$10 per square foot | $15-$30 per square foot | Complexity of the roof, labor rates in the region, project duration |
| Permits | $100-$500 | $1000-$5000 | Local regulations, size of the project, permit processing time |
Environmental Impact of Commercial Asphalt Roofing
The environmental impact of commercial asphalt roofing encompasses manufacturing, installation, and disposal. While asphalt roofing is often cost-effective, its environmental footprint should be considered.
Manufacturing asphalt roofing involves energy consumption and the use of non-renewable resources. Installation may involve the use of solvents and other potentially harmful substances. Disposal can contribute to landfill waste unless proper recycling or repurposing measures are taken.
Some asphalt roofing materials are recyclable, and efforts are underway to increase the sustainability of asphalt roofing production. However, compared to other roofing materials such as TPO or recycled materials, asphalt roofing generally has a larger carbon footprint.
Illustrative Example of a Commercial Asphalt Roof Project
Source: myroofhub.com
Consider a hypothetical two-story office building (10,000 square feet) located in a region with moderate climate and occasional heavy rainfall. The existing roof shows signs of significant wear and tear after 20 years. Given the building’s size and budget constraints, a modified bitumen roofing system is chosen for its balance of durability and cost-effectiveness. The installation involves a thorough inspection of the existing deck, removal of the old roofing material, installation of a new base layer, application of modified bitumen layers using a torch-applied method, and installation of a final cap sheet.
A challenge encountered during installation was the presence of several existing roof penetrations requiring careful flashing installation to prevent leaks. The project was completed within 5 days, within budget, and without major incidents. The modified bitumen system is expected to provide at least another 15 years of reliable service with regular maintenance.
Essential FAQs
What is the average lifespan of a commercial asphalt roof?
The lifespan of a commercial asphalt roof varies depending on the type of roofing material, climate, and maintenance. Generally, it ranges from 15 to 30 years.
How often should I inspect my commercial asphalt roof?
Regular inspections, ideally twice a year (spring and fall), are recommended to identify and address potential problems early, preventing costly repairs.
What are the signs of a failing commercial asphalt roof?
Signs of a failing roof include leaks, blisters, cracks, missing granules, and significant ponding water.
Can I repair a commercial asphalt roof myself?
Minor repairs may be possible for DIY enthusiasts with experience, but larger repairs or complete replacements should be handled by qualified professionals.
What is the best way to dispose of old commercial asphalt roofing materials?
Check with your local waste management authority for proper disposal guidelines. Many areas have specific regulations and recycling options for roofing materials.
