A Small Village With Big Roofs On Its Edge
Itasca has maybe nine thousand people and a downtown you can walk in ten minutes. It also has office and corporate campus buildings along Thorndale with roof fields bigger than some of the village blocks. We work both ends of that, and neither one gets treated like the other.
Coated field, rooftop units flashed
The Campuses Off Thorndale
The corporate and office buildings on Itasca’s north and east edges went up mostly between the late 1970s and the 2000s, and their roofs share a profile: wide low-slope fields, heavy rooftop mechanical, and a lot of curbs, ducts and conduit to flash around. On a building like that the field of the membrane is rarely what fails. The failures happen at the details, and specifically at the mechanical.
Rooftop units are the single most common source of leaks we trace on these campuses. Curb flashings work loose as units vibrate, condensate lines discharge onto the membrane and slowly break it down, and every HVAC service call leaves footprints, dropped tools and sometimes a sheet metal screw that nobody mentions. When a tenant reports a wet ceiling under an office bay, we look at what is bolted to the roof above it first.
Coatings matter here too. A lot of these roofs are at the age where the owner is deciding between a coating system and a full replacement, and the honest answer depends on what is under the surface, not on what looks worn from the parapet. If the membrane is sound and the insulation is dry, a coating buys real years for a fraction of a tear-off. If there is trapped moisture in the assembly, coating seals the problem in and the owner pays twice. We core-check before recommending either. Commercial roofing and roof inspections lay out how we evaluate it.
Buildings Full Of People Who Cannot Move
Office tenants are a different constraint from a warehouse floor. Nobody can work under a hammer drill, odors from hot work travel through the return air, and parking near a lift is a fight you do not want to have with a tenant on a Monday. So on Itasca office jobs we set the plan first: staging away from the main entrances, deliveries timed outside business hours where it matters, odor-producing phases coordinated with the building engineer so intakes can be managed, and daily cleanup so the property never looks like a job site to a visiting client.
Property managers get photo reports they can forward to ownership without translating them. Every leak we trace comes with pictures of the actual entry point, not a description. That matters when somebody upstairs has to approve the spend. Commercial roof leak work is most of what brings us to these buildings the first time.
What We Do In Itasca
- Commercial roofing and flat roof work on the office and campus buildings along the Thorndale corridor.
- TPO roof replacement and TPO repair, plus coating systems where the assembly underneath supports it.
- Leak tracing around rooftop units, curbs and penetrations, with photo documentation for ownership.
- Shingle roof replacement and repair on the older houses in and around the village core.
- Gutter replacement, gutter repair and storm damage repair on the residential side.
The Old Town Core Is Its Own Job
Walk into the village center and the buildings change completely. Itasca’s original core has houses that predate anything on the corporate edge, some going back well over a century, plus small commercial buildings along the old main street. Those roofs come with steeper pitches, real plank decking, masonry chimneys that need counterflashing cut into the mortar, and porch roofs with low slopes tied into steeper main runs.
They also come with mature trees. Shaded north slopes hold moisture, valleys pack with leaves every fall, and limbs over the roof mean the phone rings the morning after every wind event. When we replace a roof in the old part of the village we run ice and water shield well past the code minimum at the eaves and up every valley, because ice at the overhang is the recurring winter problem on these houses. We also bring shingle samples to the house so the profile reads correctly on an older building rather than looking like a suburban product dropped on it.
Storms Cross This Corner Of The County Often
Northern DuPage catches hail, and the cells that track the Elgin-O’Hare and I-290 corridors hit Itasca regularly. Our advice is the same for a homeowner and for a building owner: get it looked at within a couple weeks of the storm, even when nothing is leaking. Hail bruises the mat or the membrane without opening it, and the failure shows up a season or two later when the carrier will call it age. Documentation right after the storm is what makes the difference. See hail damage repair and insurance claims.
Guardian Roofing Systems is second generation. Angelo Ristich learned the trade under his father Frank, took the company over and modernized it, and he supervises jobs himself on both the commercial and residential side. BBB A+ rated, HomeAdvisor Elite Service award, licensed and insured in Illinois, with emergency patch response when something opens up after hours. Finished work is in the gallery, and the contact page gets you on the schedule.
Brown shingle over stucco, old core
Itasca At A Glance
Corporate campus roofs along Thorndale with heavy rooftop mechanical, an old village core with century-plus houses and mature trees, and hail cells crossing the corridor every season.
Mon to Sat, 9 to 5, with emergency patch response when storms hit.
(312) 590-4853Who We See On The Same Northern Run
Itasca is the western end of our northern DuPage County route. Wood Dale sits directly east where the buildings turn into freight and flex space, Addison south of that runs light industry along Lake Street, and Bensenville puts the crew on the O’Hare cargo side. Down toward the middle of the county, Lombard is all house work. Because these towns sit within a few minutes of each other, one commercial mobilization on the Thorndale corridor usually has residential jobs scheduled around it the same week. The whole territory is mapped on the service areas page.
What Itasca Owners Ask Us
The leak is right under a rooftop unit. Is that a roof problem or an HVAC problem?
Often both, and that is the argument we get called into. Loose curb flashing is roofing. A condensate line dumping onto the membrane is mechanical, but it is destroying the roof. We photograph what we find and tell you plainly which trade owns which part rather than pointing at the other guy so we can go home.
Can you do the work without disrupting our tenants?
Yes, and it is planned before we mobilize. Staging goes away from main entrances, deliveries get timed around business hours where it matters, and hot or odor-producing phases get coordinated with the building engineer so air intakes can be managed. We clean the site daily so the property does not look like a job site to anybody visiting.
Should we coat our roof or replace it?
Depends on what is under the membrane, and you cannot tell from the parapet. If the assembly is dry and the field is sound, a coating buys real years at a fraction of replacement cost. If moisture is trapped in the insulation, coating seals the problem inside and you pay for the roof twice. We take cores and show you what came out.
My house is over a hundred years old. Will you work on it?
Yes, and it is some of the more interesting work we do. Expect plank decking with gaps, a masonry chimney that needs counterflashing cut into the mortar rather than caulked over, and a porch roof tied into a steeper main run. We bring shingle samples to the house so the profile suits the building instead of fighting it.
We get ice at the eaves every winter on the older house.
That is heat escaping into the attic melting snow that then refreezes over the cold overhang. The permanent fix is air sealing and insulation plus real intake and exhaust ventilation. When we reroof we also run ice and water shield well past the code minimum at the eaves and up the valleys so a dam has nothing to work with.
How soon after hail should we have someone up there?
Within a couple weeks, on a house or a building, even if nothing is leaking. Hail bruises without opening, and if you wait until it leaks the carrier gets to call it age instead of storm. We inspect free, document it the way an adjuster needs it, and tell you straight whether filing is worth it.
One Call Covers The Campus Or The House
Call Guardian Roofing, tell us what building you have and what the roof is doing, and you will get a straight price and an honest read on the timeline. Or send the details through the contact page and we will call you back the same business day.