Madison Roof & Leak
Janesville, Wisconsin

Chimney repair and repointing in Janesville

A chimney can let water in without the roof being involved at all. A cracked crown, a missing cap, spalled brick or eroded mortar joints all admit water into the stack, where it travels down and appears inside looking exactly like a roof leak. Because the symptom is identical, chimneys are a common source of leaks that have been repaired at roof level more than once without success.

Call (706) 696-1888 Rock County

What the job involves

  • Inspection of crown, cap, flashing and masonry condition
  • Repointing of eroded mortar joints
  • Crown repair or recasting where cracked
  • Assessment of whether the leak is masonry or flashing

Signs you need it

  • Damp on the chimney breast inside the house
  • Visible cracking in the crown or spalling brickwork
  • A chimney leak that has been repaired at roof level before

Why roofs fail in Janesville and Rock County

Janesville has a winter long enough and cold enough that ice damming, not storm damage, is the dominant cause of roof leaks. The mechanism is heat loss rather than weather: warm air escaping into the attic melts snow on the upper roof, the meltwater runs down and refreezes over the cold overhang, and the resulting ridge of ice backs water up beneath the shingle courses until it finds a way in. The roof itself is usually in perfect condition. Repeated through a Rock County winter, freeze-thaw also works every flashing joint progressively looser, and spring brings hail and straight-line wind on top. The reason this matters is that fixing an ice dam leak by working on the shingles does not work — the problem is insulation and ventilation, and that is a different job.

Janesville has a population of about 63,575, and the housing stock here sets the pattern for what fails first on a roof.

Questions about chimney repair and repointing in Janesville

Is my leak the flashing or the chimney itself?

Both present almost identically. Flashing leaks usually show at ceiling level where the stack passes through; masonry leaks often show lower, on the breast itself, and worsen with wind-driven rain from a particular direction. Checking both before working on either saves repeating the job.

Does an unused chimney still need a cap?

More so, arguably. An open flue on a disused stack takes rain straight into the structure with nothing drawing it back out, so the masonry stays wet and deteriorates faster than one in use.

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You will get a straight answer on whether Janesville needs someone out today or whether it can wait — before anyone quotes you for anything.

Call (706) 696-1888
Call (706) 696-1888