08/04/2026
Every time it rains, one overlooked part of your home quietly goes to work. And most Lafayette homeowners have never even heard of it.
It's called window flashing.
You've probably never seen it, but it plays an important role in helping protect your home from water damage.
Here's something that surprises a lot of people...
Your siding and brick aren't designed to keep every single drop of rain out.
In fact, during heavy storms in Louisiana, it's completely normal for a small amount of water to get behind your home's exterior.
Now, that doesn't mean your home is leaking.
It simply means your home was built with another layer of protection to manage that moisture. One of those layers is window flashing.
Window flashing is usually made from metal or a waterproof membrane. It's installed around your windows and hidden behind the siding, brick or trim. Its job is simple: collect any water that gets behind the exterior and direct it safely back outside before it reaches the wood framing, insulation or drywall.
When it's doing its job, you'll probably never know it's there.
The problem starts when the flashing is missing, damaged, worn out or installed incorrectly during construction, a window replacement or an exterior renovation.
When that happens, rainwater can slowly make its way into the wall, one storm at a time.
And because it happens where you can't see it, the warning signs often don't show up right away.
You might notice peeling or bubbling paint around a window. Maybe there's a stain on the wall, a musty smell, damp drywall or even mold.
But by the time you see those signs, water may have already been getting into the wall for weeks... or even months.
Most window flashing is hidden behind the exterior of your home, so you usually can't inspect it directly.
However, what you 'can' do is keep an eye on the visible areas around your windows, especially after a strong storm.
Look for cracked or missing caulking, damaged trim, gaps around the frame, peeling paint, stains, moisture or unusual odors. Outside, check that any drainage openings around the window haven't been painted over or blocked by debris.
It's also worth paying extra attention to windows that have been replaced or homes that have had recent exterior work done. That's when flashing is most likely to have been disturbed if it wasn't installed correctly.
Walking around your home to check your windows only takes a few minutes.
Ignoring an early warning sign, however, can allow a small exterior problem to turn into a much bigger repair hidden inside the wall.
Here in Lafayette and throughout Acadiana, heavy rain and high humidity are just part of everyday life. Understanding how your home is built to handle water can help you spot a problem early, before it becomes a much bigger and more expensive one.