Imagine your roof is like a giant umbrella for your house. It’s designed to keep the rain out, right?
But here’s the tricky part: wherever something pokes through that umbrella – like a chimney – you have a potential weak spot. That’s where chimney flashing comes in.
So, what exactly is chimney flashing?
It’s a thin layer of metal installed around the base of your chimney, sealing the gap between the chimney and your roof.
Think of it like the seal around your shower – water would get everywhere without it. Chimney flashing does the same job, but for your roof, keeping rainwater from sneaking in through the cracks.
You might wonder, “Why is this little metal strip so important?”
Well, let me tell you, in my 15+ years as a roofing pro, I’ve seen more leaks caused by improperly installed or missing flashing than anything else.
When flashing is properly installed, it diverts water away from vulnerable areas. But trouble awaits if it’s cracked, rusted, or poorly fitted.
A solid flashing job can save you from headaches – leaks, rot, mold, and structural damage. It’s one of those things you don’t notice when it’s done right, but you’ll see when it goes wrong.
Now, let’s get into the nitty-gritty. You might think flashing is just a simple metal strip, but different types are designed for specific jobs. Here’s a quick rundown:
This is used along the sides of the chimney. It’s called step flashing because it’s installed in a step-like pattern tucked under each row of shingles. It’s great for shedding water away from the joint.
This is the top layer of flashing that overlaps the step flashing. It’s embedded into the chimney’s mortar joints, creating a second barrier to keep water out.
This type is installed at the base of the chimney. It helps direct water away from the bottom edge, where it most likely pools.
Sometimes called a “saddle,” this is a small, peaked structure built behind the chimney to divert water away. It’s essential for larger chimneys that could create a water trap.
Each plays a part in making sure water has no way in. And trust me, you want them all working together like a well-oiled machine.
Picture this: It’s a rainy Sunday afternoon, and you notice a wet spot on your ceiling near the chimney. That’s the first sign of a leak at the chimney, and trust me, it’s not something to ignore.
Leaks at the chimney are like a ticking time bomb – the longer you wait, the worse the damage gets.
Here’s what I tell my clients to look out for:
One of the most common signs is a brown, discolored patch on your ceiling. If it’s near your chimney, that’s a big clue that the flashing might be failing.
Water can sneak in and travel down the walls. If you notice dampness or peeling wallpaper, especially around the fireplace, it’s time to check your flashing.
Take a look at the exterior of your chimney. If you see moss or mold growing where the chimney meets the roof, it’s a good sign that water is pooling and not draining correctly.
Sometimes, the water makes it inside. If you hear or see water dripping in your fireplace during a rainstorm, there’s likely a problem with your flashing.
If you spot any of these signs, don’t wait. A small leak might seem no big deal, but water damage can spread quickly. Fixing it can save you thousands in repairs down the road.
I once had a client, a lovely older couple, who called me out to look at a small stain near their chimney. They thought it was nothing serious.
When I got up on the roof, I found that the flashing was rusted through, and the wood underneath was starting to rot. If we hadn’t caught it when we did, the damage could’ve been disastrous.
We replaced the flashing, repaired the wood, and sealed it tight. The couple was so relieved – and that’s what I love about this job. It’s not just about fixing roofs; it’s about protecting people’s homes and giving them peace of mind.
If you notice any issues with your chimney or want a quick check-up, call me at JM Exteriors. I’m always happy to help keep your home safe and dry.
