The roof is one of the most critical components of any commercial building. It provides protection against the elements, helps regulate indoor temperatures, and plays a crucial role in the overall structural integrity of the establishment.
However, not all commercial roofs are created equal. There are various roof types, each with its own set of advantages and disadvantages. But out of all the commercial roof types, how do you choose which one is right for you?
In this comprehensive guide, we will explore:
- The differences between flat and sloped roofs
- Identify signs that indicate it’s time to replace your commercial roof
- Delve into different commercial roof types and their pros and cons
- Discuss the costs associated with installing a new commercial roof
Flat vs. Sloped Roofs
Before diving into the specifics of different commercial roof types, let’s first understand the fundamental difference between flat and sloped roofs.
Flat Roofs:
Flat roofs, also known as low-slope roofs, have a nearly horizontal surface. They are commonly used in commercial buildings due to their practicality for housing HVAC systems and other equipment. Flat roofs are typically less expensive to install than sloped roofs.
Drainage can be a challenge with flat roofs, and ponding water can lead to leaks and structural issues if not properly managed. Common materials used for flat roofs include built-up roofing (BUR), modified bitumen, EPDM (ethylene propylene diene monomer), and TPO (thermoplastic olefin) membrane.
Sloped Roofs:
Sloped roofs have a noticeable pitch or incline, allowing rainwater and snow to naturally run off. They are often chosen for their aesthetics, as they can add architectural character to a building.
Sloped roofs tend to be more durable and provide better drainage than flat roofs. Roofing materials for sloped roofs include:
- Asphalt shingles
- Metal
- Tile
- Wood shakes
While sloped roofs may be costlier to install initially, they often require less maintenance over time.
Signs You May Need to Replace Your Commercial Roof
Maintaining the integrity of your commercial roof is vital for the long-term well-being of your building. Here are some signs that may indicate it’s time to consider a roof replacement:
- Age: Most commercial roofs have a lifespan of 20-30 years. If your roof is nearing or has exceeded this range, it may be time for a replacement.
- Leaks: Frequent or persistent leaks, especially after repairs, suggest that your roof’s membrane may be compromised and in need of replacement.
- Visible Damage: Cracks, blisters, or punctures in the roofing material are clear signs of roof deterioration that may require replacement.
- Water Ponding: If water consistently pools on your flat roof, it can weaken the structure and lead to leaks. Proper drainage solutions may be necessary.
- Energy Efficiency Decline: An increase in energy costs due to poor insulation or heat loss through the roof may necessitate a replacement with more energy-efficient materials.
- Interior Damage: Water stains, mold growth, or deteriorating ceiling tiles inside the building can indicate a roof leak.
- Frequent Repairs: If you find yourself frequently patching or repairing your roof, it may be more cost-effective in the long run to invest in a new roof.
7 Different Commercial Roof Types
Now, let’s explore various commercial roof types and their respective advantages and disadvantages.
1) Built-Up Roofing (BUR):
✅ Pros:
- Excellent durability and longevity.
- Provides good protection against UV rays.
- Resistant to fire and strong winds.
❌ Cons:
- Heavier than other roofing systems, requiring strong structural support.
- Installation can be labor-intensive and time-consuming.
- May require periodic maintenance.
2) Modified Bitumen Roofing:
✅ Pros:
- Offers good flexibility and can accommodate building movement.
- Resistant to hail and fire.
- Easy and cost-effective to repair.
❌ Cons:
- Shorter lifespan compared to some other roofing options.
- Vulnerable to punctures and tears.
3) EPDM Roofing (Rubber Roof):
✅ Pros:
- Highly durable and resistant to UV rays.
- Lightweight and easy to install.
- Low maintenance requirements.
❌ Cons:
- Prone to punctures from sharp objects.
- May degrade over time due to exposure to certain chemicals.
4) TPO Roofing (Thermoplastic Olefin):
✅ Pros:
- Energy-efficient and reflective, reducing cooling costs.
- Resistant to UV radiation and chemical exposure.
- Lightweight and easy to install.
❌ Cons:
- May not be as durable as some other roofing materials.
- Vulnerable to punctures.
5) Metal Roofing:
✅ Pros:
- Exceptional longevity, with a potential lifespan of 50+ years.
- Highly resistant to fire, wind, and hail.
- Energy-efficient and reflective.
❌ Cons:
- Initial installation cost can be high.
- Expansion and contraction with temperature fluctuations may cause noise.
- Proper insulation is essential to prevent condensation issues.
6) Asphalt Shingles:
✅ Pros:
- Cost-effective and widely available.
- Easy to repair and replace damaged shingles.
- Variety of styles and colors for aesthetic appeal.
❌ Cons:
- Limited lifespan compared to other roofing materials (15-30 years).
- Vulnerable to wind and hail damage.
- May require more frequent maintenance.
7) Tile Roofing:
✅ Pros:
- Elegant and timeless appearance.
- Exceptional durability and longevity (50+ years).
- Resistant to fire, rot, and insect damage.
❌ Cons:
- Heavy, requiring strong roof support.
- Expensive installation.
- Tile breakage can be challenging to repair.
The Cost of Installing Commercial Roofing Systems
The cost of installing a new commercial roof varies widely depending on several factors, including the type of roofing material, the size and complexity of the roof, labor costs, and local market conditions. Here’s a rough estimate of the cost per square foot for different commercial roof types:
- Built-Up Roofing (BUR): $5 to $10 per square foot
- Modified Bitumen Roofing: $3 to $8 per square foot
- EPDM Roofing (Rubber Roof): $4 to $8 per square foot
- TPO Roofing (Thermoplastic Olefin): $4 to $8 per square foot
- Metal Roofing: $8 to $15 per square foot
- Asphalt Shingles: $2 to $6 per square foot
- Tile Roofing: $10 to $20+ per square foot
Keep in mind that these are rough estimates, and the actual cost of your commercial roof installation may vary. It’s essential to obtain quotes from reputable roofing contractors to get an accurate assessment of the project’s cost.
Learn More About Commercial Roofing Materials
Selecting the right commercial roof type for your building is a crucial decision that can impact your property’s longevity, energy efficiency, and maintenance costs.
Understanding the differences between flat and sloped roofs, recognizing signs that indicate the need for a roof replacement, and weighing the pros and cons of various roofing materials will help you make an informed choice.
Got questions? Johnson Restoration has answers. Contact us today to learn more about types of commercial roofing and get your commercial roofing system back in working order!
