Blog / October 11, 2026

Chimney Flashing & Roof Check After the First Ice Mornings: A Wylie & DFW Homeowner Guide

Short answer: in the week after the first couple of cold North Texas mornings (when frost shows up on the lawn and the cars ice over), walk the chimney from the ground and look for daylight at the seam, missing or rusted flashing, and dark stains running down the brick. Chimney flashing is the single most common first leak on a North Texas roof, and a 5-minute ground check catches almost every problem.

1) Why chimney flashing fails first

• Flashing is the thin metal seam where the chimney meets the shingles — it takes the most weather stress on the roof.
• North Texas heat cycles, hail, and the small freeze-thaw swings in late fall crack the sealant and the mortar joints.
• A small flashing gap can leak for months before it ever shows as a ceiling stain near the fireplace.

2) Ground-level check (do this first)

• Stand back from the house and look at the chimney from two angles.
• Note daylight visible between the chimney and the shingles at any corner.
• Look for tar or sealant that has cracked, pulled away, or is missing in spots.
• Check the brick for dark vertical stains running down from the flashing line.

3) Check the cricket (the small roof behind the chimney)

• A cricket is the small peaked diverter on the uphill side of a wider chimney.
• Look for missing shingles on the cricket, exposed felt, or debris piled where water can't drain.
• Leaves behind the chimney are the most common reason a cricket leaks before the flashing does.

4) Attic-side confirmation

• On a sunny day, look in the attic around the chimney for any daylight showing through.
• Check for damp insulation or dark wood around the chimney framing.
• Smell for musty or charred odors after a cold morning — a slow leak often shows up as a smell first.

5) What to photograph and when

• Date-stamped photos of the chimney base, the cricket, and any visible stains or daylight.
• Wide shot from the yard plus a close-up of the most concerning spot.
• Photo log makes any future insurance conversation or repair quote much smoother.

6) When to call a roofer

• You see daylight at the chimney base or any visible gap.
• You notice ceiling stains or damp smells near the fireplace.
• The flashing is visibly rusted, lifted, or missing in places.
• You're not sure whether what you see is cosmetic or functional.

7) What a small flashing repair usually involves

• Re-sealing the counter-flashing against the brick with a high-grade roof sealant.
• Replacing rusted step flashing along the chimney-to-roof seam.
• Re-mortaring any cracked joints where the flashing meets the chimney crown.
• For older roofs with chronic flashing leaks, a cricket rebuild or full re-flash is often the smarter move.