Your roof valley is where two slopes meet—forming a natural channel that carries rainwater down to the gutters.
Think of valleys like highways for rain. They move more water than any other part of your roof.
Because they’re constantly handling runoff, they wear down faster and are one of the top sources of roofing leaks.
✅ If you understand how valleys work, you can prevent damage before it starts.
Here’s what most homeowners don’t know:
Valleys are under constant pressure
They often see more water than any other spot
Poor design or materials = major leak risks
“Every drop that hits your roof ends up in the valley. That’s why it wears out faster.” – Adam Sand
Two roof planes come together at an angle.
That intersection becomes a trough, guiding water down and off your house.
But valleys are also structural weak points—especially when:
Shingles are misaligned
There’s no waterproof membrane
Nails are placed too close to the center
Shingles from each side are woven together in a crisscross pattern.
🚫 Problem: Water flows back and forth, wearing out the shingles faster.
“If you’ve got woven valleys, you’re probably looking at repairs—or a full replacement—sooner than you think.”
One slope’s shingles overlap the other, then the top layer is cut to fit.
🎯 Benefits:
Cleaner look
Better flow control
Reduced shingle wear compared to woven
Still, closed valleys can erode over time if not reinforced properly.
Start with a waterproof membrane
Add a W-shaped metal channel
Nail it only at the edges
Shingle over for protection and aesthetics
“With a metal valley, you replace your roof when the main faces wear out—not because your valleys failed first.”
✅ Longest-lasting
✅ Best protection
✅ Clean, professional finish
Investing in a better valley system does more than prevent leaks:
Extends roof life
Reduces repair calls
Improves curb appeal
Prevents rot, mold, and structural damage
Many companies even offer free or discounted upgrades for a limited number of feet.
Most homeowners don’t think about valleys—until there’s a leak in the drywall.
“Your valleys are where all the raindrops go to party—and if the path’s broken, the party moves inside.”
✅ Inspect your valleys.
✅ Ask your contractor what type you have.
✅ Upgrade when you can—it pays for itself.
It’s where two sloped roof sections meet. Valleys channel rainwater off your roof and into gutters—but they’re also vulnerable to leaks.
They wear out shingles faster due to zigzag water flow. This can lead to premature leaks and early replacements.
A metal W valley is the most durable and protective option. It resists leaks and extends your roof’s lifespan.
In some cases, yes—especially during repairs or partial replacements. Many companies offer incentive upgrades.
Look for:
Water stains on ceilings
Sagging shingles near joints
Rust on valley metal
Visible granule loss or cracking