Moss and Black Streaks on a Roof: What Each One Means
Black streaks on a roof are usually algae. What causes them, when moss on a roof matters, and how zinc strips and algae-resistant shingles help.
Schaumburg, IL · Free homeowner guide
A stain on the ceiling after the January thaw, shingles in the yard after a May storm, or a 1970s roof on its third layer. This guide to Schaumburg roofing helps you tell a $400 repair from a replacement, and estimate requests go to an independent local roofing contractor partner who puts the number in writing before anyone starts.
Three things wear roofs out here faster than the shingle warranty suggests.
The first is winter. Schaumburg averages about 37 inches of snow a winter, and it does not fall once and melt. It sits, thaws in a January warm spell, refreezes at the eave overnight and builds an ice dam. Water backs up under the shingles and shows up as a stain on the ceiling above a north-facing bedroom. On the 1960s and 70s ranches and split-levels in Weathersfield, Timbercrest and Lexington Fields — low slopes, shallow attics, thin insulation — ice dams are the most common winter roof problem.
The second is spring. Northern Illinois gets hail and straight-line wind from April through June, and the roofs along Roselle Road and Schaumburg Road take it on shingles that were often already 20 years old. Hail bruises the mat; wind lifts tabs and breaks the seal. Both start leaks months later, when everyone has forgotten the storm.
The third is age and layers. A lot of houses in Schaumburg, Hoffman Estates and Streamwood are on a second or third roof, and at least one of those was nailed over the one before it. Local codes generally cap asphalt roofs at two layers — your village building department confirms the rule for your address — and a roof on top of another roof holds heat, hides rotten decking and fails early. A good replacement quote states how many layers are up there and what the tear-off will cost, because that is where surprise invoices come from.
Roof repair — leaks at chimneys, pipe boots, valleys and skylights, wind-lifted shingles, ice dam damage. Most repairs are $300–$1,500 and often done in a morning.
Roof replacement — full tear-off, deck repair, ice-and-water shield at the eaves and valleys, architectural shingles or standing-seam metal, with proper ridge and soffit ventilation. Typical Schaumburg homes run $9,000–$22,000.
Storm damage roof repair — what to check after hail or wind, tarping, repair, and what to photograph for your insurer. Be wary of anyone knocking on doors after a storm, and read the contractor questions first.
Roof inspection — before a sale, after a storm, or because the roof is 20 years old and you want a straight answer instead of a sales pitch.
Flat and low-slope roof repair — the flat sections over the garage or family room on a split-level. Rubber (EPDM), TPO and modified bitumen. Asphalt shingles do not belong on them, and a lot of them have shingles anyway.
Schaumburg first, then the villages around it: Hoffman Estates, Elk Grove Village, Palatine, Arlington Heights, Streamwood, Hanover Park, Roselle, Bartlett, Rolling Meadows and Bloomingdale. Arlington Heights and Hoffman Estates have their own pages because their housing stock differs enough from Schaumburg's to need one.
Illinois licenses roofing contractors through the Department of Financial and Professional Regulation (IDFPR). Ask for the roofer's state license number and look it up on the IDFPR license search — it shows whether the license is active and any discipline. Then ask the Village of Schaumburg, or your own village's building department, whether the roofer needs to be registered there and whether the job needs a permit. This guide is not a roofing contractor and does not hold a license of its own. We only use roofers licensed by the Illinois Department of Financial and Professional Regulation — ask for their state license number. Anything that sounds like a legal question — contract terms, cancellation rights, what a roofer may offer — is one to check with IDFPR, the Illinois Attorney General, your village or an attorney.
Water on the ceiling, shingles in the yard, a sagging line along the ridge, an ice dam with icicles the size of a forearm, or a roof that is simply old and you want to know how long it has left. Request a free estimate and it goes to an independent local roofing contractor partner. If water is coming in, say so — a local roofer will usually tarp first and do the estimate after. If it is a dry week, the repair-or-replace guide is a good ten-minute read first.
When a repair will hold, when it will not, and how to get a straight answer about which one you are looking at.
Leaks at chimneys, pipe boots, valleys and skylights, wind-lifted shingles and ice dam damage — how they're found, what they cost, and when a repair is enough.
Roof Repair →Full tear-off, decking repair, ice-and-water shield, architectural shingles or standing-seam metal and proper ventilation — what a full tear-off should include, and how long it takes.
Roof Replacement →Hail, straight-line wind and ice damage — what to check, what to photograph and how to avoid storm chasers.
Storm Damage →A walk on the roof and a look in the attic, with photos and a written report that says repair, replace or leave it alone — for buyers, sellers, storms and old roofs.
Roof Inspection →The low-slope section over the garage or family room on a split-level. EPDM rubber, TPO and modified bitumen — when it can be repaired, when it needs replacing, and how it should be flashed where it meets the shingles.
Flat & Low-Slope Roofs →Schaumburg, Cook County and the suburbs. Area codes 847, 224.
Black streaks on a roof are usually algae. What causes them, when moss on a roof matters, and how zinc strips and algae-resistant shingles help.
HOA roofing rules explained: who owns a townhome or condo association roof, who pays, how to get a leak fixed, and what single-family HOAs approve.
Commercial roofing in Schaumburg for small buildings: TPO and EPDM explained, repair vs restore vs replace, snow, ice and storm damage, and typical costs.
Soft wash vs pressure wash on a roof: why a pressure washer strips Schaumburg asphalt shingles, what a soft wash is, what it costs, and when to skip it.
Sagging roof line on a Schaumburg house: 1960s rafters, snow load, too many shingle layers, rotten decking, and what each fix typically costs.
Roof repairs before winter in Schaumburg: which must be done before shingles stop sealing, which can be done in winter, and which can wait for April.
Most repairs run $300 to $1,500. A pipe boot or a few wind-lifted shingles is at the low end; chimney flashing, a valley rebuild or ice dam damage with some decking replaced is toward the top. If more than a third of the roof needs work, a good roofer will tell you replacement is the better spend and show the math.
Asphalt shingle replacement runs about $450 to $800 per square (100 sq ft) installed, so a typical 1,600–2,400 sq ft ranch or split-level lands between $9,000 and $22,000 depending on layers, pitch, decking and the shingle. Metal is two to three times that. The cost page breaks it down.
In two parts. On the roof side, a roofer steams the dam off if water is actively coming in, then replaces the damaged shingles and any decking that rotted under them. The lasting fix is at the eave and in the attic: ice-and-water shield at least 24 inches inside the exterior wall line — often two courses, about 6 feet, on low-slope ranches — plus air sealing, insulation and ventilation so the roof stays cold. Get both parts quoted.
Illinois licenses roofing contractors through the Department of Financial and Professional Regulation (IDFPR). Ask for the roofer's state license number and look it up on the IDFPR license search — it shows whether the license is active and any discipline. We only use roofers licensed by the Illinois Department of Financial and Professional Regulation — ask for their state license number.
Photograph the damage, call your insurer, and get a written repair estimate from a licensed roofer. The adjuster decides what's covered; in a dispute, a public adjuster licensed by the Illinois Department of Insurance can represent you — ask your agent or an attorney. This guide doesn't handle claims. Be wary of any roofer who offers to waive, cover or rebate your deductible — it can put your claim at risk. Ask your insurer or an attorney.
Yes, and it is usually the part that leaks. The low-slope section over the garage or family room on a Schaumburg split-level needs a membrane — EPDM, TPO or modified bitumen — not shingles. Doing both halves of the house on the same job means the transition is flashed once, properly.
Call for a free estimate. Mon–Sat 7am–7pm.