New flashing installed around a roof vent pipe with shingles in place

A recent job in Southport: we opened the area around a leaking roof vent, checked the decking, and rebuilt the flashing and shingles. See the repair step by step

What you may notice

Signs that point toward a roof vent leak

These signs are worth an inspection. None of them confirms the source on its own.

A stain or drip near a vent location Discoloration or drips on a ceiling or wall near where a vent pipe passes through the roof, often near a bathroom, kitchen or laundry area.
It shows up during rain The spot appears or grows during rain, especially wind-driven storms, rather than when fixtures are in use.
A cracked or loose boot From the ground, the collar around the pipe looks cracked, split, or pulled away from the pipe.
Lifted shingles or exposed nails Shingles around the vent are lifted, or nail heads near the flashing are uncovered.

Repair options

Reseal, replace the boot, or rebuild the vent area

The inspection tells us whether we can fix the boot or flashing, or whether there's wider wear that needs work.

Reseal When the boot and flashing are still sound and the gap is small, resealing exposed nails or a seam may be enough.
Replace the boot or flashing When the collar is cracked or the flashing is damaged, we replace it and tie it back into the shingles.
Rebuild the vent area When water may have gotten under the shingles, we take off the shingles around the vent, check the decking and rebuild the layers.
Shingles removed around a roof vent pipe, with the decking exposed for inspection Ice and water shield on the roof decking around a vent pipe, tucked under the existing underlayment New roof vent flashing with sealant applied to its underside before installation

Why boots fail

How pipe boots and vent flashing wear out

Rubber collars and sealants sit exposed to sun, heat and wind-driven rain. Over time they can dry out, crack, or pull away from the pipe, and nails near the flashing can loosen or lose their seal. Storms that drive rain sideways test that joint harder than a light shower.

Worth a look when: the roof has been through several storm seasons, the boots have never been replaced, or a stain appears near a vent location.

Original roof vent pipe boot on a gray shingle roof before the repair Close view of the original roof vent pipe boot

Inspection

What the inspection covers

We check the boot, the flashing, the shingles around it and, when needed, the decking underneath, so the estimate matches what is really there.

Weighing a bigger decision? The roof repair vs. replacement guide explains the difference.

Gustavo Vera is a FORTIFIED Roofer (provider ID R012048). FORTIFIED is a program of the Insurance Institute for Business & Home Safety (IBHS) for building roofs that better resist high wind, hail and hurricanes, which is worth knowing if you are planning a new roof.

Roof vent leak questions

Common questions about vent and pipe boot leaks

Does a ceiling stain near a bathroom mean the roof vent is leaking?

Not necessarily. A roof vent is one possible source, but water can travel along the decking before it shows inside, and plumbing or condensation can cause stains too. An inspection looks at the roof side to find where water is getting in.

What are a pipe boot, roof jack and vent collar?

They are common names for the flashing that seals the roof around a pipe that passes through it. Pipe boot and roof jack usually mean the whole fitting; the collar is the part that wraps the pipe.

Are bath fan vents and plumbing vents the same thing?

No. A plumbing vent lets the drain system breathe; a bath fan vent carries exhaust from a bathroom fan. Either one may exit through the roof, and the fitting on the roof can be different, so tell us what you know about the room below the leak.

Does every vent leak need the full repair in the photos?

Not always. Some vent leaks only need resealing or a new boot. Opening the area to the decking makes sense when water may have reached the wood or earlier fixes have not held. The plan depends on what the inspection finds.

Will a vent leak mean I need a new roof?

Not necessarily. The inspection tells us whether we can fix the boot or flashing, or whether there's wider wear that needs work. We explain what we see and you decide. There is no sales pressure.

How much does roof vent or pipe boot repair cost?

It depends on what the inspection finds: the type of fitting, how easy it is to reach on the roof, and how much damage there is around it. A reseal, a new boot, and work down to the decking are different jobs, so the estimate is written for what your roof needs.

Is the inspection free?

Yes. The inspection and estimate are free, and the inspection includes photos and notes. If you want a written inspection report and don’t hire us for the work, the report has a fee based on the time and roof involved.

Service area

Roof vent leak repair in Brunswick and New Hanover Counties

We repair roof vent and pipe boot leaks across Brunswick County and New Hanover County, including Southport, Oak Island, Leland, Wilmington and Carolina Beach and Kure Beach. See the towns and communities we serve in Brunswick County and New Hanover County.

Leak near a roof vent?

Request a roof vent leak inspection

Tell us the property address, which room shows the stain or drip, and the best way to reach you.