Frequently Asked Questions
What are the most common types of commercial roofing systems?
The most common commercial roofing systems include:
- TPO (Thermoplastic Polyolefin) – Energy-efficient, durable, and resistant to UV rays.
- EPDM (Ethylene Propylene Diene Monomer) – A rubber membrane known for flexibility and weather resistance.
- PVC (Polyvinyl Chloride) – Strong, resistant to chemicals, and excellent for flat roofs.
- Metal Roofing – Long-lasting, durable, and highly resistant to extreme weather.
- Modified Bitumen – A flexible, asphalt-based system with excellent waterproofing.
- Built-Up Roofing (BUR) – Multiple layers of bitumen and gravel for added protection.
How long do commercial roofs last?
The lifespan depends on the material and maintenance:
- TPO & PVC: 15-30 years
- EPDM: 15-30 years
- Metal: 30+ years
- Modified Bitumen: 20-30 years
- BUR: 20-30 years
How do I know if my commercial roof needs repairs or replacement?
Signs that indicate your roof may need repairs or replacement include:
- Leaks or water damage inside the building.
- Ponding water on the roof.
- Cracks, blisters, or punctures in the membrane or coating.
- Loose or missing flashing or edge metal.
A professional inspection can determine if repairs or a full replacement is necessary.
What is the best roofing system for a flat commercial roof?
TPO and PVC are popular choices but the best roofing system depends on factors like your climate and slope. The best system can be determined by having a commercial roofing contractor, like WNC Roofing, come out and examine your facilities specific needs and situation.
How often should I have my commercial roof inspected?
It’s recommended to have your commercial roof inspected twice a year—once in the spring and once in the fall. Additionally, an inspection should follow major storms or severe weather events.
What is the cost of a commercial roof replacement?
The cost depends on factors like roof size, material, installation complexity, and location. On average it can cost anywhere from $5-20 per sq.ft. depending on the material and take off requirements.
A professional roofing contractor can provide an accurate estimate based on your specific needs.
Can a commercial roof be repaired instead of replaced?
Yes, minor issues like leaks, small punctures, or localized damage can often be repaired. However, if the roof is severely damaged, aged, or has multiple problem areas, a replacement may be the best long-term solution.
How can I extend the lifespan of my commercial roof?
To maximize your roof’s lifespan:
- Schedule regular inspections and maintenance.
- Keep gutters and drainage systems clear.
- Address minor repairs before they become major issues.
- Ensure proper ventilation and insulation.
Do I need a permit to replace a commercial roof?
Yes, most local building codes require a permit for commercial roof replacements. The exact requirements vary by location, so it’s best to check with local authorities or consult a commercial roofing contractor.
Should I coat my commercial roof?
Coating your roof is a great option if it’s in good condition and It’s not recommended for severely damaged or moisture-trapped roofs. A roof survey is necessary to evaluate your roof to see if a coating will adhere appropriately and last.