How To Install Vent Pipe Flashing On An Existing Roof

The last thing you want to deal with is a leaky roof. Your life is busy and hectic enough already that you don’t need another thing to fix. Remaining proactive and putting in things to prevent leaks in the first place is the best way to stop a leaky roof before it starts.

If not, it can cost you thousands of dollars to fix. If you decide to add a fireplace or stove to your home, you’ll want to add vent pipe flashing to prevent leaks. The process is easy, and you don’t need any special skills to get the job done.

The DIY project consists of loosening shingles, putting on the flashing, and nailing it down. It’s really that simple! It’s always a good idea to finish with a roofing cement to seal any cracks or crevices.

This article is going to teach you everything you need to know about installing a vent pipe flashing on an existing roof. We’ll go over step-by-step instructions, the different types of flashing, and more.

The main reason to add in flashing anywhere on your roof is to prevent leaking. When you stop leaks before they start, you create a positive domino effect, including extending the lifespan of your roof. Over the years, the flashing can get out and deteriorate.

It’s always important to know the state of the flashing on your roof to help reduce water damage. Installing vent pipe flashing is simple because it has a big, flanged base that can quickly be lapped into shingles. It’s inexpensive and doesn’t require hiring a roofing contractor or any professional to get the job done.

On average, roof flashing should last 15 to 20 years when applied correctly. This can range, depending on where you live. If the weather in your area is often wet, snowy, or rainy, the lifespan could be less.

After you’ve installed the flashing, you’ll want to ensure that the top and side shingles are bent back. Also, you want to double-check that the metal of the nails matches the metal of the flashing. If not, there can be a chemical reaction that leads to corrosion and erosion over time.

Speaking of double-checking, look at the bottom of the flashing and make sure it’s OVER the shingles on the bottom. Take the nails and hammer into the tops, sides, and bottom edge of the flashing.

Related Questions

Is roof flashing necessary?

Flashing on a roof and on a vent pipe is absolutely necessary. When the roof plane meets a vertical wall, if there’s no flashing, it poses a leak risk. Leaky roofs can cost you thousands of dollars to repair or replace. It can be hard to remove old flashing on split-level roofs or chimneys. The difficulty also depends on the type of material you’re working with. If you’re struggling to get it off, it’s best to hire someone to avoid further damaging your roof. 

Does flashing go over or under tar paper?

When applying flashing on your roof, it can be confusing to know what order things do in. I like to think of it similarly to building a sandwich. You’ll have the drip edge along the eaves before putting the ice and water barrier on. After that, you’ll apply the tar or felt paper over the drip edge. 

Is roof venting required by code?

Ventilation is a must if you’re working with a chimney or stove to keep toxins out of your home. The majority of homeowners also believe that attics should be vented to help create a natural airflow throughout the house. When a roof doesn’t have any ridge vents or just soffit vents, most codes require more.To get a direct answer, you’ll have to look up the codes for your specific city or state. It can vary quite a bit from one place to another. This is a good thing to do whenever you move to a new city or build your own home.