Why the chimney is a top leak source
A chimney pushes a masonry column through a roof that flexes and sheds water in a different way than brick does. Where the two meet, a thin strip of metal flashing is all that stands between rain and the attic. When that metal lifts, rusts or loses its sealant, water follows the brick down inside the house, and the stain often shows up far from the chimney itself.
Hampton Roads weather finds the weak points fast. Salt air near the water eats at fasteners and sealant, nor'easter wind drives rain sideways into the uphill face of the chimney, and the swing between hot summers and cold winters keeps opening hairline gaps between mortar and metal. Water that dams behind a wide chimney has nowhere to drain, which is why the high side needs a cricket.
Masonry leaks too. Cracked mortar joints, a crumbling crown and brick that wicks moisture all let water in above the roofline, and no amount of new flashing fixes water that enters through the brick. A proper look at the chimney covers both the metal and the masonry before anyone picks up a tube of sealant.
Step flashing, counter flashing, crickets and masonry sealing
Roof Masters works the chimney in layers. Step flashing is woven into the shingle courses up each side, so every course sheds water over the metal below it. Counter flashing is set into the mortar joints and laps over the step flashing, which lets the roof and the chimney move without opening a gap. Along the downhill face a base flashing runs under the shingles and up the brick.
On a wide chimney, a cricket, a small peaked saddle behind the uphill side, splits the water and sends it around the brick instead of letting it pile up. Without one, leaves, pine needles and snowmelt collect against the uphill face and the flashing carries the load alone. Roof Masters builds the cricket as part of the flashing job and ties it into the shingle system already on the roof.
Chimney sealing covers the masonry above the roof. The crew looks at the mortar joints, the crown and the brick face, seals what is open, and treats the joint where the counter flashing meets the brick. The goal is that water has no side door: it runs off the crown, over the flashing and onto the shingles, then down to the gutter.
What to watch for after a storm, and what stays covered
Look at the chimney from the yard once a year and after any major storm. Rust streaks, a gap between the metal and the brick, lifted shingles near the chimney, and a ceiling stain on the wall that backs onto it are all reasons to call. Whether the house is in Yorktown, Poquoson or Williamsburg, the rhythm is the same.
A flashing repair is a small job when it is caught early and a decking repair when it is not. Roof Masters inspects first, then tells you whether a re-flash and seal is enough or whether wet decking and shingles around the chimney have to come out too. Estimates are free and same-week, and active leaks get the 24/7 emergency line.
Roof Masters pairs the manufacturer's warranty on materials with a workmanship warranty on the installation, and financing is available through GreenSky if the chimney turns into a bigger repair. Call (757) 219-2106, say where the stain is showing, and ask for the chimney to be looked at before the next rain.
