Reliable Flat & Low-Slope Roofing Systems for Industrial and Commercial Buildings

Cornerstone Restoration provides expert commercial roofing installation, repair, and replacement for flat and low-slope roof systems throughout Illinois. We specialize in TPO (Thermoplastic Polyolefin) and Modified Bitumen roofing — durable, energy-efficient solutions ideal for warehouses, retail centers, office buildings, and other commercial or industrial facilities.

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Our certified installers work with leading manufacturers including GenFlex®, Mule-Hide®, GAF®, and CertainTeed®, ensuring your roof performs under the toughest conditions while meeting all warranty and code requirements.

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TPO Roofing Systems (GenFlex® & Mule-Hide®)

TPO (Thermoplastic Polyolefin) roofing is one of the most popular commercial flat roof materials due to its energy efficiency, strength, and low maintenance requirements.

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Advantages of TPO Roofing:

• Energy Efficient: Highly reflective white membrane reduces cooling costs.

• Durable & Flexible: Resists punctures, tears, and UV exposure.

• Low Maintenance: Ideal for large commercial roofs with long service life.

• Versatile Installation: Available in fully adhered or mechanically fastened systems for different project needs.

• Manufacturer Options: Choose from GenFlex® or Mule-Hide® TPO systems, both backed by strong manufacturer warranties.

 

Modified Bitumen Roofing (CertainTeed® & GAF®)

Modified Bitumen (Mod Bit) is a time-tested flat roofing system known for its rugged durability and multilayer protection. It’s ideal for smaller commercial roofs or buildings requiring granular surface protection.

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Modified Bitumen Features:

• Tough, Weather-Resistant Membrane: Excellent performance in Illinois’ temperature extremes.

• Granulated Surface Options: Added UV protection and slip resistance.

• Flexible Installation: Installed using torch-down or peel-and-stick (cold-applied) methods, depending on building type and safety requirements.

• Trusted Brands: Available from CertainTeed® and GAF®, two of the industry’s leading commercial roofing manufacturers.

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Insulation & Roof Board Systems

We offer ISO board (polyisocyanurate insulation) and other insulation materials to improve thermal performance, reduce energy costs, and create a stable substrate for your new flat roofing system.

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Our team ensures proper slope, drainage, and adhesion to meet manufacturer specifications and building code requirements.

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Why Businesses Choose Cornerstone Restoration

• Over 20 years of commercial roofing experience

• Certified installers for GenFlex®, Mule-Hide®, GAF®, and CertainTeed® systems

• Expertise in both fully adhered and mechanically fastened TPO roofs

• Torch-down and peel-and-stick modified bitumen specialists

• Comprehensive insulation and drainage solutions using ISO boards

• Licensed, insured, and compliant with OSHA safety standards

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