Business Details
22 Years
experience
Emergency
services
Your Trusted Partner for Roofing & Siding Solutions in McHenry, IL
Gen Ex Construction was founded in 2004 by Paul Antonou and David Johnson, two longtime friends with a shared commitment to excellence in exterior construction. With over 15 years of combined experience, we specialize in residential and commercial roofing, siding, and gutter solutions while maintaining strict safety standards and meticulous attention to detail. Our team works directly with insurance companies to ensure clients receive full compensation for storm damage claims, backed by a 10-year workmanship warranty and an A+ rating from the Better Business Bureau. We guarantee customer satisfaction through transparent communication, documented pre-existing conditions, and a 24-hour emergency hotline for urgent needs. 
Services
Residential Roofing
Commercial Roofing
Siding Repair
Gutter Services
Emergency Storm Damage
Details
- Year established: 2004
Highlights and features
- 15+ years of combined experience in exterior construction
- A+ rating with the Better Business Bureau
- Google Guaranteed with verified licenses and insurance
- 10-year workmanship warranty on all installations
- Direct insurance claim assistance with adjuster coordination
Associations and certifications
- Better Business Bureau
- Google Guaranteed
- Owens Corning Preferred Contractor
What people say
Prompt, professional
Knowledgeable, responsive
Timely manner
Excellent job
Highly recommend
Services
Residential Roofing
We specialize in complete residential roofing solutions including repairs, replacements, and storm damage restoration. Our certified technicians use premium materials like Owens Corning shingles to ensure lasting protection. Homeowners benefit from our insurance claim expertise and meticulous documentation process that maximizes coverage while minimizing stress.
Commercial Roofing
Our commercial roofing division handles multi-tenant properties, industrial buildings, and retail spaces with tailored solutions. We offer TPO membrane systems, flat roof repairs, and maintenance contracts for property managers. Our team accommodates business schedules with after-hours work options and guarantees minimal disruption to operations during installations.
Siding Repair
We restore damaged siding to original condition using matching materials and color-matching techniques. Our process includes careful documentation of pre-existing conditions and coordination with insurance providers. Customers receive comprehensive protection through our 10-year workmanship warranty covering all installation-related issues.
Gutter Services
Our gutter specialists provide full system replacements, repairs, and maintenance using durable materials that resist clogging. We install seamless gutters with protective features that channel water away from foundations. The service includes detailed inspections to identify potential water damage risks during roof projects.
Emergency Storm Damage
Available 24/7 for urgent storm damage situations, our rapid response team provides temporary fixes and permanent repairs. We handle insurance claims directly and offer same-day assessments with detailed documentation. Emergency services include tarping, water extraction, and structural stabilization to prevent further property damage.
People
Paul Antonou
Co-Owner
Co-founder with 20+ years in exterior construction, Paul oversees operations and quality control. He ensures all projects meet safety standards and customer expectations through hands-on management and continuous staff training programs.
David Johnson
Co-Owner
Co-founder and technical expert, David manages complex installations and insurance negotiations. With extensive field experience, he developed the company's documentation protocols that help homeowners maximize insurance claims while minimizing out-of-pocket costs.
Questions
What services does Gen Ex Construction offer?
We provide residential and commercial roofing, siding, gutter installations, storm damage repairs, and emergency services with insurance claim assistance.
Do you offer warranties on your work?
Yes, we provide a 10-year workmanship warranty covering labor errors and manufacturer warranties on materials used in installations.
How does your insurance claim process work?
Our team documents damage, coordinates with adjusters, and handles paperwork to maximize your insurance coverage while minimizing your involvement.
Are you available for emergency repairs?
Yes, we offer 24/7 emergency services for storm damage with rapid response times and temporary protection solutions.
Do you serve areas outside McHenry?
We serve McHenry County and surrounding areas including Crystal Lake, Cary, and Woodstock with no additional travel charges.
Can financing options be used for home projects?
Yes, we offer financing options for qualifying customers to make exterior home improvements more accessible and affordable.
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Reviews (2)
Shannon Zerin
Jul 23, 2018
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Quality work, fast, friendly, and professional. Great communication, and competitive prices! From start to finish, threse guys know what they're doing, and they do it well! I would highly recommend them to everyone i know! Call Gen-Ex! 8153883561
Dana Ferguson
Jul 20, 2017
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A great company to work with! Paul is honest, and his guys work hard. Decently priced, and is great working with the insurance adjusters! Thanks Gen-Ex for being awesome!
