Why Is My Roof Leaking Around the Chimney in Fargo-Moorhead?
A roof leaking around the chimney in Fargo-Moorhead is most often caused by failed flashing, the metal and sealant that bridge the brick and the shingles, after years of freeze and thaw movement. Less often the cause is cracked mortar or a chimney that never had a proper cricket behind it. Dodd Roofing and Exteriors can usually repair a chimney leak without replacing the roof when the surrounding shingles still have life left, and our inspections are free.
Why does the chimney leak before the rest of the roof?
A chimney is the one spot where brick, metal, and asphalt meet, and each material expands and shrinks at a different rate. Brick is heavy and barely moves, while the roof deck and flashing shift with every temperature swing. Over time the seam between them opens. Water also has more reasons to stop there. Runoff from the slope above piles up against the uphill side of the chimney, and without a small peaked diverter called a cricket, that water and the snowmelt sit against the flashing instead of flowing around it.
What does freeze and thaw do to chimney flashing in the Red River Valley?
Fargo-Moorhead can swing from below zero overnight to above freezing by afternoon several times in a single week during November and March. Each cycle lets meltwater creep into hairline gaps in the sealant, freeze, and pry the gap a little wider. Tar and caulk that looked fine in summer turn brittle in January and pull away from the brick. Step flashing that was surface nailed instead of tucked under the shingles can lift at the edges. The same pattern shows up elsewhere on the roof, and our post on roof flashing leaks in Fargo walks through it.
How can I tell chimney flashing from masonry or ice dam trouble?
Start with timing. A stain that appears during a spring thaw or a steady rain usually points to flashing. A stain that shows up in the dead of winter after a cold snap may be an ice dam or attic frost, which is a different fix. Look at the brick from the ground too. Crumbling mortar, white mineral streaks, or a leaning cap suggest the masonry itself needs a mason, not a roofer. A ceiling stain on the wall that shares the chimney chase, or damp drywall right beside the fireplace, is the classic sign of a flashing leak. Our guide to a roof leaking after the first snow covers how to tell a true leak from attic condensation.
What does a chimney repair look like on older Fargo and Moorhead homes?
Older homes near Hawthorne and Roosevelt in Fargo, and the established neighborhoods of Moorhead, often have tall brick chimneys with decades of patched tar around the base. Newer homes in south Fargo, West Fargo, and Horace tend to have shorter chases wrapped in siding or stone veneer, where the leak is usually a failed counter flashing or a missing kickout. A proper repair removes the old tar, installs new step flashing woven into each shingle course, sets counter flashing into the mortar joint instead of smearing sealant over it, and adds a cricket when the chimney is wider than about thirty inches, which is what the building code expects. We finish by sealing the joint with a cold rated sealant that keeps its grip through a North Dakota winter.
Does homeowners insurance cover a chimney leak?
It depends on the cause. Policies in North Dakota and Minnesota generally cover sudden damage, such as a storm tearing flashing loose or hail bruising the shingles around the chimney, but they exclude wear and tear and slow leaks from aging sealant. Interior damage follows the same logic. Take photos of the stain, the flashing, and the roof before anyone cleans anything up, and read your policy for the wind and hail deductible. Our storm damage page explains how we document damage for a claim, and the homeowner guide library collects the rest of our insurance explainers.
What should I do before the first snow?
Set a bucket under the drip, move belongings out of the way, and photograph the stain with the date. Do not climb onto a wet or icy roof to look for the source. The best repair window in Fargo-Moorhead runs until nighttime temperatures stay below freezing, usually late October, because sealant needs milder weather to cure. A chimney repair done now is far cheaper than the drywall, insulation, and decking that a winter of slow leaking can ruin. Book a free inspection with Dodd Roofing and Exteriors by calling (701) 831-0710, or read more about our roof repair work in the Fargo area.
Comments