Roof Leak Repair: What You Need to Know

A leaky roof isn’t just annoying — it’s a threat to your home’s structure and your family’s health. Left alone, even a small leak can cause water damage, mold growth, and repair bills that snowball fast. Here’s what causes leaks, how to spot them, and what to do about it.

Common Causes of Roof Leaks

We see the same culprits over and over. Here are the most common reasons roofs leak in Utah:

1. Damaged shingles — Missing, cracked, or broken shingles leave your roof deck exposed to water. Utah’s hail season and high winds are the usual suspects.
2. Clogged gutters — When gutters are packed with debris, water backs up and pools on your roof instead of draining away.
3. Cracked flashing — Flashing seals the gaps around chimneys, vents, and skylights. When it cracks or pulls away, water finds a path inside.
4. Skylight issues — Poorly sealed or aging skylights are a frequent leak source. The seals break down over time, especially with Utah’s UV exposure.
5. Roof vent problems — Broken or improperly sealed vents let moisture right into your attic.
6. Ice dams — A major issue in Utah’s mountains. Ice forms at the eaves, traps water behind it, and forces it under your shingles. We see a lot of ice dam damage in Park City, Heber, and Midway.
7. Aging roof — Every material has a lifespan. As your roof gets older, it simply becomes more prone to leaks.

How to Spot a Roof Leak

Leaks don’t always announce themselves with a dramatic drip from the ceiling. Often, the signs are subtler. Watch for:

• Water stains on ceilings or walls (brown or yellowish spots)
• Dripping water, especially during or after rain or snowmelt
• Musty or moldy smell in the attic or upper floors
• Warped or sagging areas on the ceiling
• Visible damage on the outside — missing shingles, damaged flashing, clogged gutters

Spring is the most common time for leak discoveries in Utah. As winter snow melts, water finds every weak point in your roof. If you notice any of these signs during the spring thaw, don’t wait — get it looked at.

Steps to Repair a Roof Leak

Here’s the general process for tracking down and fixing a leak:

1. Locate the leak. Start in the attic with a flashlight. Look for water stains, mold, or daylight coming through. The entry point is often higher up on the roof than where the stain appears inside.
2. Remove damaged materials. Carefully pull back shingles or other materials around the leak area to expose the damage underneath.
3. Replace shingles or flashing. Install new shingles or flashing, applying waterproof sealant to ensure a watertight seal.
4. Seal any remaining gaps. Use roofing tar or sealant on small cracks and gaps around the repair area.
5. Test your repair. Use a garden hose to spray water on the repaired area and check from inside the attic to make sure the leak is fixed.

When to Call a Professional

Some leaks you can handle yourself with a tube of roofing sealant. But call a pro when:

• The damage is extensive or covers a large area
• The leak involves skylights, chimneys, or complex flashing work
• You’ve patched the same area before and it keeps leaking
• There are signs of structural damage like sagging or rotted decking
• You’re not comfortable working on a roof (no shame in that — roofs are dangerous)

Preventing Future Leaks

The best leak repair is the one you never need. Stay ahead of problems with these habits:

• Inspect your roof twice a year — spring and fall
• Keep gutters clean and flowing freely
• Trim branches that hang over your roof
• Check flashing and vents annually
• Address small issues immediately, before they turn into big ones

Need help with your roof? Call Cardinal Roofing at (801) 330-0311 or get a free estimate.