Chimney Flashing and Waterproofing in New Jersey

How Chimney Flashing Is Repaired Properly

A lasting chimney flashing repair follows four steps and uses reglet-cut counter-flashing, which separates a fix that lasts from a bead of caulk that does not.

1. Pull the failed flashing and inspect the seam beneath.
2. Weave new step flashing into the shingle courses.
3. Counter-flash into a cut mortar joint, not surface caulk.
4. Breathable waterproofing on the masonry above.

What Sets the Flashing Number

The price depends on chimney size and roof pitch. The method does not change, because cut-in counter-flashing costs more than a caulk bead and is the version that lasts.

Warranty That Means Something

Ask to review the applicable warranty with your written estimate. NJ HIC #13VH11720500, insured, with our own licensed crew on your roof and no subcontractors.

Discounts and Financing

Seniors and veterans save on every job with our discount. 0% financing is on the table. You get the real number in writing before anything starts.

The Leak That Gets Misdiagnosed Most

Water stains near the fireplace, a damp patch on the chimney breast wall, and peeling paint on the ceiling around the chase are often blamed on the roof, the brick, or the gutters. Most of the time the actual cause is the flashing, the metal system where the chimney passes through the roof, which is the hardest detail on the roof to do correctly and the easiest to cover with a caulk bead.

What Correct Flashing Looks Like

1. Step flashing: individual L-shaped pieces woven shingle-by-shingle up each side of the chimney, so every course sheds onto the one below.
2. Counter-flashing: a second layer cut into the mortar joints (a saw cut, called a reglet, not surface-glued) and bent down over the step flashing, where the mortar holds the metal in place.
3. A cricket on the uphill side of wide chimneys. A small peaked diverter that splits water around the masonry instead of letting it pond against the back.
4. Ice and water membrane beneath all of it, because this is the spot ice dams hit first.

What failing flashing looks like: a smear of roofing tar over the joint. Tar bridges the gap for two or three seasons, dries, cracks, and channels the water in more efficiently than no fix at all.

Waterproofing the Masonry Itself

Brick and mortar absorb water, so after repairs we apply a breathable siloxane-type repellent. Water beads off the surface while vapor inside the masonry can still escape, which matters because paint-on sealers that form a film trap moisture inside the brick and the next freeze pops the faces off.

Copper, Aluminum, or Steel

Flashing material matters more than almost anywhere else on the roof: copper costs the most and often outlasts the roof around it, aluminum is the budget standard with a service life in the decades when installed right, and galvanized steel falls in between. We match the material to the roof's remaining life, the house's character, and your plans, since copper on a roof with five years left is wasted and thin aluminum on a slate roof will not last as long as the slate.

How to Prove the Fix Worked

A flashing repair is proven by running directed water on the repaired detail while someone watches the ceiling below, and the dry result is documented with the rest of the photos.

Who is right when a roofer says flashing and a mason says brick? It can be both, which is why a proper repair covers the flashing and the masonry above it: water through failed flashing soaks the brick, and wet brick deteriorates.

Does waterproofing sealer go on every job? After repairs it goes on the masonry above the flashing line as a breathable repellent, but not on glazed or painted brick, which cannot take it.

How long does a proper flashing repair take? The schedule depends on the scope, including any reglet cuts or cricket work, and the expected sequence is discussed after the chimney is inspected.

Why Tar Keeps Getting Sold

Tar stays common on North Jersey chimneys because it is a quick job: a roofer can smear mastic on a chimney joint without cutting a single reglet, and for a couple of seasons the ceiling stays dry. When you compare chimney leak quotes, ask whether the metal is cut into the mortar joint or applied on top of it.

How do I know if my flashing was done right last time? From the ground, counter-flashing should look like a clean metal line set into the joints, and black smears mean tar, while dampness on the chimney framing in the attic after a hard rain means water is still getting in.

Does waterproofing change the brick's color? A proper breathable repellent goes on clear and dries invisible, unlike the shiny wet-look sealers, which are the film-forming kind.