Bob Vila Radio: Locating a Leak in the Roof

Before you can repair a roof leak, you first need to locate the problem. That sort of detective work is rarely a cinch, but these tips can help you crack the case more quickly.

The toughest part of fixing a roof leak is often to figure out where the water is getting in. It’s not uncommon for water to enter the roof at one spot before traveling, by dint of gravity, to the spot where you finally notice it as a stain on the drywall, for example, or as a saturated panel of fiberglass insulation.

How to Find a Leak in the Roof


Audio clip: Adobe Flash Player (version 9 or above) is required to play this audio clip. Download the latest version here. You also need to have JavaScript enabled in your browser.

Listen to BOB VILA ON LOCATING ROOF LEAKS, or read the text below:

The best way to spot a leak is to head up to the attic on a rainy day. Bring along a flashlight with a good, strong beam and use it to look for areas of wetness. Since water reflects light, so you should be able to find the spot pretty quickly. Once you’ve found it, remember to mark it so that you can find it again a day or two later.

When you have a clear day, make your way up to the roof. Meanwhile, ask a helper indoors to tap on the spot you marked in the attic. Working together, the two of you should be able to locate the shingles directly above the wet area. Communicating via speakerphone here may be prove faster than taking turns tapping.

If you don’t see signs of entry directly above the mark made in the attic, try looking a little further up the roof. Also, check to see if any of the “usual suspects” in roof leaks are located near to where you’re looking. These include dormer valleys, chimney flashing, and the gaskets surrounding pipes and wiring.

When it comes to making the repair, a little roofing cement can go a long way!

Bob Vila Radio is a newly launched daily radio spot carried on more than 60 stations around the country (and growing). You can get your daily dose here, by listening to—or reading—Bob’s 60-second home improvement radio tip of the day.

  • Favorites Flipboard Facebook Twitter Pinterest Email AddThis
Roofing & Siding