◆ A Profile in Craftsmanship
Paul Antonou and David Johnson learned the trade together, got licensed together in 2004, and have run Gen-Ex side-by-side ever since. Roofing, gutters, siding, windows — the full exterior package out of McHenry.
Paul Antonou and David Johnson learned the roofing trade as friends, got licensed together in 2004, and built Gen-Ex Construction out of McHenry as a partnership ever since. Two decades of side-by-side work on the same NW Chicago suburb homes.
We cover the full exterior package — roofing, gutters, siding, windows. McHenry County weather is no joke: lake-effect-adjacent winters with heavy snow load, severe summer thunderstorms, occasional hail. After 22 years on these homes, we size every job for the climate it actually lives in.
The same hands that lay your shingles flash your siding. The same eyes that size your gutters set your windows. The full exterior, run in-house.
Asphalt shingle, architectural, and metal systems for McHenry County homes. Tear-off, decking inspection, ventilation, flashing — sized for lake-effect snow load and McHenry County hail.
Seamless aluminum systems sized for NW Illinois snowmelt and heavy spring rain. Get the water off the roof and away from the foundation — fast.
Vinyl, fiber-cement, and engineered wood siding for McHenry-area homes. Insulated where it counts, flashed where it matters.
Replacement windows for the four-season climate. Triple-pane on north walls, low-E coatings, real install crews — not a sub.
Paul or David climbs the roof. Photographs, measurements, decking condition, ventilation, flashing. We bring the findings back to you with a real plan.
Written, itemized, no theatrics. Insurance coordination if there's been hail or wind. A real number — no door-knocker pressure.
Paul and David got their licenses together in 2004 and have run this crew side-by-side ever since. Two owners on the job, never a stranger at the door.
Magnet-swept yard. Manufacturer warranty registered. Paul or David answers the phone after the truck leaves — twenty-two years of McHenry County repeat customers proves that out.
Paul and David did our roof in 2018, gutters in 2022, and the siding last fall. Same crew, same standards, same handshake every time. Two-thirds of our block has them on speed dial now.
Paul or David walks the roof, photographs the damage, and hands you a written estimate in plain language. Two decades of McHenry County experience. No high-pressure pitch.