Commercial Roofing

A. Flat Roofs

• EPDM (Ethylene Propylene Diene Monomer)
  • Synthetic rubber membrane
  • Long-lasting (up to 50 years), flexible, and weather-resistant
• TPO (Thermoplastic Olefin)
  • Single-ply membrane
  • Reflective, energy-efficient, and resistant to UV and chemical exposure
• PVC (Polyvinyl Chloride)
  • Single-ply membrane
  • Durable, fire-resistant, and chemical-resistant
• Built-Up Roofing (BUR)
  • Multiple layers of bitumen and reinforcing fabrics
  • Durable and good for heavy foot traffic areas
• Modified Bitumen
  • Similar to BUR but with added polymers for flexibility
  • Durable and easy to maintain

B. Metal Roofs

• Standing Seam
  • Interlocking metal panels that run vertically
  • Highly durable and low maintenance
• Corrugated Metal
  • Wavy metal sheets
  • Cost-effective and durable

C. Green Roofs

• Vegetative Roofing Systems
  • Layers of vegetation over a waterproof membrane
  • Improves insulation, reduces stormwater runoff, and enhances building aesthetics

D. Asphalt Shingles

• Used occasionally for small commercial buildings
  • Cost-effective and easy to install

A. Leaks

• Caused by punctures, membrane shrinkage, or poor installation
• Repair with patches, sealant, or membrane replacement

B. Ponding Water

• Due to poor drainage or roof slope
• Address by improving drainage systems or installing tapered insulation

C. Roof Membrane Damage

• Cracks, blisters, or punctures
• Repair with patches, sealants, or membrane replacement

D. Flashing Failures

• Improper or deteriorated flashing around edges, vents, or chimneys
• Repair or replace flashing to prevent leaks

E. Thermal Expansion and Contraction

• Can cause membrane or metal roof panels to crack or become loose
• Use flexible materials and proper installation techniques to mitigate

A. Preparation

• Inspect and prepare the roof deck
• Remove old roofing materials if necessary

B. Installation

• Apply insulation if required
• Install the chosen roofing membrane or material
• Ensure proper sealing and attachment, especially around edges and penetrations

C. Finishing

• Install flashing and edge details
• Inspect and test for proper drainage and sealing

A. Regular Inspections

• At least twice a year and after severe weather
• Check for damage, leaks, and wear

B. Cleaning

• Remove debris from roof surface and gutters
• Ensure drains and downspouts are clear

C. Prompt Repairs

• Address minor issues before they become major problems
• Use professional services for significant repairs or complex systems

D. Roof Coatings

• Apply reflective or protective coatings to extend the roof’s life and improve energy efficiency