How long should chimney flashing last?


With proper installation, regular inspection, and consistent maintenance, chimney flashing can last up 30 years. But the longevity of flashing depends on many variables, including where you live, the type of material used, the size of your roof, and the type of roof shingles you have.

Subsequently, Should chimney flashing be replaced with new roof? It’s important to have your roof flashing maintained Your roof flashing should outlive the original roof it was installed on, no matter what kind of metal is used. And you already know my recommendation to replace the roof flashing during your roof replacement.

Why does chimney flashing leak? A cracked chimney crown, the effects of weather, wear and condensation on the metal flashing, and leaking bricks can all cause leaky flashing. In a lot of cases, you can actually repair the flashing rather than replace it altogether. However, significant damage could require a complete replacement.

Yet, Is chimney flashing necessary? Chimney flashing is no exception. People often talk about tuckpointing, sweeping, liners and other chimney services but flashing often flies under the radar. However, chimney flashing is an extremely important part of your chimney’s functionality.

Should chimney flashing go under shingles? Seal the sides of the chimney with prebent pieces of step flashing under each course of shingles (Photos 4 and 5). Slightly flatten the step flashing before you nail it in to ensure a tighter, spring-tensioned fit against the chimney.

Can you put new flashing over old?

If you have reglet cut flashing then it can be carefully replaced if it is in bad shape or you don’t like the looks of it. If you have zee flashing at siding or at stucco, it will probably have to stay since it is behind those surfaces.

Does flashing go over or under shingles?

Flashing should overlap the roof-covering material, but on asphalt shingle roofs, for aesthetic reasons, the part of the headwall flashing that extends down over asphalt shingles is often covered with a course of shingle tabs.

What material is used for chimney flashing?

Aluminum – a very popular choice. Aluminum flashing is inexpensive and can be installed on any type of roof. It’s also resistant to rust. Steel – steel is also a very common material used for chimney flashing.

Does flashing need to be replaced?

If your contractor doesn’t see rusting and the metal’s integrity is still holding up, then your flashing won’t need to be replaced during your roof replacement. On the other hand, if it’s damaged, rusted, or if you’re upgrading from a 3-tab to dimensional asphalt shingle, it will need to be replaced.

How long should roof flashing last?

You can expect roof flashings to last 20 to 35 years, with an average of 25 years. A flashing is any material that is used as a transition between roofing and another surface or at a roof penetration, or at a change in plane of the roofing itself. If a roof is leaking, it is likely at a flashing.

Do roofers replace flashing around chimney?

If you’re getting some roof renovation done and you have a chimney, make sure that the roofer you hire is experienced in dealing with replacing the flashing on and around chimneys. Chimney flashing is essential.

Can you put new flashing over old flashing?

Typically, we will replace step flashing when doing a new roof. Also, a new flashing should not be layered over the old flashing. Your roof is supposed to have only one layer of flashing at a time. Installing new flashing is the only way that we can guarantee quality outcomes when replacing your shingle roof.

Should flashing be caulked?

Metal Flashing (or any metal to wood joint) should not be caulked.

Should roof flashing be caulked?

Renew flashing seals by chipping out the old mortar and caulking along the edges of the flashing. Use special masonry caulk to seal the joints between the flashing and the chimney. Seal the seam between the cap and step flashing with urethane roofing cement or silicone caulking compound, as shown at right.


Please enter your answer!
Please enter your name here