Roofing in Warrenville, IL
Warrenville is a small DuPage town that most people drive through on the way to somewhere else: the Cantera development on one side, the I-88 corridor running across it, Fermilab and the forest preserves close by, and a residential core with a very particular era stamped on it.
The Addition Problem
Warrenville has more low-slope residential roofing per house than anywhere else we cover, and it is because of when the town built out. A lot of the 1970s and 1980s stock here has had a sunroom, a family room extension, a covered porch or a converted breezeway added at some point, and an enormous proportion of those additions have roofs under 2:12.
Which matters, because a roof under 2:12 cannot use asphalt shingles. Aurora states that flatly in its own code and the principle is the same in DuPage. Shingles shed water, they do not hold it back, and on a nearly flat roof water lingers and wind pushes it sideways up under the courses.
That is why so many Warrenville homeowners describe a roof that is fine in ordinary rain and leaks in a downpour, or leaks only when the weather comes from one direction. The roof is not damaged. It is the wrong roof, and no amount of resealing fixes a materials mismatch. What it needs is a membrane, and the options are on the TPO and EPDM page.
1970s and 1980s Stock, Second Time Around
The main roofs on those same houses are typically on their second or third covering by now, which raises the layer question. Two layers means everything comes off, and quite a few Warrenville houses are already there.
The other era-specific issue is ventilation strategy, or the absence of one. Houses of this vintage frequently have gable vents and nothing else, or gable vents plus a ridge vent added during a later re-roof, which is worse than either alone. A ridge vent will happily pull air from a nearby gable vent rather than from the soffits, short-circuiting the attic entirely and leaving the far corners unventilated. If you have both, one of them usually needs to go.
DuPage, Cantera and the Commercial Side
Warrenville is DuPage County and runs its own building department, so the permit process is the city's rather than anything Kane County or Aurora does. Straightforward enough, and we handle it.
On the commercial side, the Cantera development and the office and light industrial along Ferry Road and the I-88 frontage are almost entirely single-ply membrane roofs, which is a different service altogether. Drainage design, tapered insulation, curb detailing around rooftop units, and planned maintenance programmes. That work is covered on the commercial roofing page.
Sunroom or addition that only leaks in heavy rain? That is usually the wrong roof rather than a broken one.
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What We Do in Warrenville
All services available in Warrenville. Low-slope and membrane work is a bigger share of what we do here than anywhere else on the list.
Warrenville Roofing Questions
Why does my sunroom leak only in heavy rain?
Because the pitch is too shallow for the material. Shingles need gravity to work and a nearly flat roof gives them nothing to work with, so a real downpour pushes water back up under the courses. It needs a membrane, not more sealant.
Can you do both the main roof and the addition at once?
Yes, and it is cheaper that way. Two different systems, one mobilisation, one permit.
I have gable vents and a ridge vent. Is that a problem?
Usually yes. The ridge vent tends to draw from the gable vents rather than the soffits, which leaves most of the attic unventilated. Typically one of them needs closing off.