Storm Damage & Insurance

Roof Leaking? What to Do Right Now

Updated October 2026 · 5 min read · By the Knoxville Roofing Quotes team

Hopefully you're not in full crisis mode. Here's what causes leaks, how to find them, and what to do next.

Why Roofs Leak

Water is sneaky. It doesn't always drip straight down. It follows paths – along rafters, down pipes, through gaps you'd never notice. Here are the most common causes:

Damaged or Missing Shingles

Wind, age, or impact damage leaves gaps. Water gets under the remaining shingles and into the deck.

Failed Flashing

Flashing is the metal pieces around chimneys, vents, skylights, and roof joints. It's supposed to direct water away from vulnerable spots. When it fails (rusts through, lifts, or loses its seal) water gets in. It's one of the most common leak sources. Our chimney flashing guide and skylight leak guide cover two of the usual trouble spots.

Clogged Gutters

Backed up gutters push water under the roof edge. This causes soffit damage and can work its way inside.

Ice Dams

After heavy snow, ice can build up at the roof edge and trap meltwater behind it, forcing it under the shingles. Knoxville averages only about 4.6 inches of snow a year, according to the National Weather Service, so this is uncommon here, but it happens after big snows.

Condensation

Not technically a "leak" but produces the same result. Poor attic ventilation causes moisture to condense on the underside of the deck. It drips down like a leak. Common culprit when the "leak" only happens sometimes.

Plumbing/HVAC Issues

Sometimes what looks like a roof leak is actually a plumbing leak from above, or condensation from AC ductwork in the attic. Worth checking before assuming roof.

Finding the Source

Here's the frustrating part: where water shows up inside isn't necessarily where the leak is. Water can run along rafters and pipes for several feet before it drops through your ceiling.

Start in the Attic

If you have attic access, go up there during or right after a rain (carefully – it might be slippery). Look for:

• Active dripping
• Water trails on rafters or decking
• Dark stains or discoloration
• Wet insulation
• Daylight showing through (shouldn't happen)

Trace any water trails upward to find the entry point.

Check the Usual Suspects

Most leaks happen at:

• Around chimneys
• Around vent pipes
• At roof valleys
• Around skylights
• Where additions meet the main roof
• At flashing points

The Garden Hose Test

Roofers sometimes find stubborn leaks by running water over one section of the roof at a time, starting low and working up, while someone watches inside. It works, but it means being on the roof, so leave it to the roofer unless you can do it safely from a ladder.

Temporary Fixes

You've found the general area. A roofer can't come until tomorrow. Here's how to minimize damage:

Tarping

A tarp is the standard emergency fix when there's visible damage. It needs to extend well past the damage, ideally over the ridge, and be held down with boards screwed into the deck, since weights and sandbags alone tend to blow off. Our emergency roof tarp guide walks through it, including when to leave it to a pro.

Tarps are temporary. They shift, tear and eventually fail, so don't treat one as the fix.

Roofing Cement

Roofers often use roofing cement or sealant as a stopgap on a lifted flashing edge or a gap around a pipe until a proper repair can be made. It buys time, not years, and it's only worth doing if the spot can be reached safely in dry weather.

Bucket Brigade

If you can't stop the leak, contain it. Buckets, plastic bins, towels under them to catch splashes. Empty regularly. Check throughout the night if rain continues.

When to DIY vs Call a Pro

You Can Probably Handle:

• Protecting the inside: buckets, plastic sheeting, moving belongings
• Checking the attic to narrow down the area
• Unclogging gutters from a ladder, if gutters are the cause
• Photographing the damage for your records and insurer

Call a Professional For:

• Anything requiring you to work on a steep slope
• Multiple damaged shingles
• Chimney flashing issues
• Skylight leaks
• Leaks you can't locate
• Any structural damage
• Warranty concerns (a DIY repair can complicate a warranty claim)

Our guide to which roof repairs are safe to DIY explains where to draw the line. For costs, HomeAdvisor's June 2026 national data puts most roof leak repairs around $360 to $1,550.

The Hidden Damage Problem

Here's what people don't realize: by the time you see water dripping inside, damage has been happening for a while. The leak path gets soaked first. Insulation absorbs water. Wood starts to rot.

Getting the leak fixed quickly isn't just about stopping the drip – it's about preventing or limiting the hidden damage. The longer water gets in, the worse it gets.

After the leak is fixed, have someone look in the attic to assess what got wet. Saturated insulation should be replaced. Any wood showing signs of rot needs attention.

Insurance Considerations

Insurers' guides generally say homeowners policies cover sudden, accidental damage, like wind or a falling tree opening up the roof, but not leaks from age, wear and tear or neglected maintenance. Your policy's wording decides it, so check with your agent.

Document everything: photos of the damage inside and out, when you first noticed it, and receipts for emergency repairs. Tennessee's Department of Commerce and Insurance advises filing claims as soon as possible because policies can have notification deadlines. Our insurance claim guide walks through the process.

Preventing Future Leaks

Once you've dealt with this leak, think about prevention:

• Annual roof inspections catch problems early
• Keep gutters clean
• Trim trees that hang over the roof
• Check attic after major storms
• Address small issues before they become big ones

A leak is stressful, but it's usually fixable. Limit the immediate damage, then get a professional out to fix it properly. If the roof is old and leaking in more than one place, our guide to repair vs. replacement can help you decide what's next.

Sources

• HomeAdvisor: Roof repair cost, including leak repair (updated June 2026)
• Farmers Insurance: Does home insurance cover roof leaks?
• Bankrate: Does homeowners insurance cover roof leaks?
• TDCI: Insurance and contractor tips (2026)
• National Weather Service Morristown: Knoxville climate