You've probably heard the term "flashing" when people talk about roofs, but do you know what it means? 

In this article, we'll teach you flashing 101 so you understand why it's so important and what can go wrong. You'll learn the different types of flashing, how roofers install it, and common flashing problems to watch out for. After reading, you'll see why hiring a professional to install or repair your flashing is worth the investment to protect your most valuable asset - your home. So get ready for a crash course in this roofing secret that keeps the water out and your house dry. 

What Is Flashing and Why Is It Important? 

Flashing is the material used to seal and protect the joints and seams of your roof from water damage or leaks. Without flashing, rain and moisture can seep into tiny cracks and holes, damaging your attic, ceilings, and walls. 

Why Do You Need Flashing? 

Flashing is essential for any roof to function properly and last long. It reinforces the roofing material and prevents water from getting in where the roof surface meets vertical surfaces like chimneys, vent pipes, skylights, and the roof's edges.  

• Chimney flashing seals the gap between the chimney and the roof surface. Without it, water can pour into the attic and the fireplace's walls. 
• Skylight flashing protects the opening around skylights and prevents leaks into the attic or room below. 
• Vent pipe flashing encircles plumbing vents, exhaust fans, and other pipes that penetrate the roof. 
• Edge flashing lines the outer edges of the roof, including the hips and valleys, to guard against wind-driven rain and moisture getting under the shingles. 

Common Areas That Require Flashing on a Roof 

All roofs have weak points, usually in areas where the structure is interrupted or joined. This is where flashing comes in handy. It serves as a protective barrier in those critical spots. To maintain your home's primary defense against the weather, it's vital to understand the common areas on a roof that require flashing. Let's explore these areas in more detail. 

Valleys 

The valley is where two sloped roof planes meet, forming an internal corner. Flashing is installed lengthwise down the valley to channel water off the roof. Faulty or damaged valley flashing is a leading cause of leaks. 

Dormers 

Dormers are structures that protrude from the roof, and the areas where the dormer meets the sloped roof require flashing to prevent water entry. Look for cracking or buckling around the edges of the dormer, as this can allow water to seep in. 

Pipes or Vents 

Any pipes, vents, or other fixtures penetrating the roof must be properly flashed. The flashing forms a waterproof seal around the base of the fixture. If the flashing shows signs of damage or wear, it should be repaired or replaced quickly to avoid a leak. 

Edges and Seams 

Flashing is also used along a roof's edges, seams, and intersections to seal and join materials together. Edge flashing provides a finished edge along the perimeter of the roof. Look for loose, buckled, or torn-edge flashing and repair or replace it as needed. 

Signs You Need New or Repaired Flashing 

If your roof leaks or shows water damage inside your attic or upper floors, it's time for new or repaired flashing.  

Water stains on siding or water-damaged areas on interior ceilings. This indicates water getting in, often due to damaged or missing flashing. Have a roofer inspect and repair or replace the flashing around pipes, vents, the chimney, and any low or damaged areas where water could enter. 

Cracked, warped, or loose flashing. Flashing should lay flat against the roof, tightly sealed around the edges. If the flashing has come loose, is visibly damaged, or is no longer flush against the roof, it needs to be repaired or replaced to prevent leaks. 

Shingles lifting at the edges or seams. Shingles that lift at the edges allow water to get underneath, which can lead to rot and leaks. Often, this is due to faulty flashing, especially in valleys, around pipes, or the chimney. 

Dark streaks or stains on exterior walls. Water may run down behind damaged flashing, exiting lower on exterior walls. The streaks are a sign water has found a way in, damaging insulation, wood, and drywall inside. 

Condensation or water droplets in the attic. If you notice moisture in the attic, especially in localized areas with seams, vents, or pipes in the roof, it usually indicates a flashing issue. 

How to Properly Install and Replace Flashing 

When it comes to properly flashing your roof, there are a few key steps to keep in mind. Flashing helps seal up vulnerable areas where water could seep, like edges, seams, and penetrations. Installing it correctly is critical to preventing leaks and ensuring your roof lasts as long as possible. 

Inspect the area 

First, inspect the area you need to flash to determine what materials and tools you'll need. You'll want roof cement, sealant, and reinforcing fabric like flashing tape for sealing edges and seams. For penetrations like pipes, you'll want pipe boots or collars. You'll also need basic tools like a caulk gun, utility knife, and work gloves. 

Clean and dry the surface 

Clean the area to remove any dirt or debris. Scrub away any old caulk or roof cement. Allow the surface to dry completely so the new flashing adheres properly. Moisture prevents good adhesion. 

Apply sealant 

Apply a thick bead of roof cement or sealant around the edges, seams, and the base of penetrations. Spread it to about 6 to 8 inches wide using a putty knife or caulk tool. 

Add reinforcing fabric (optional) 

For the best protection, embed a strip of flashing or roof tape into the sealant. Press firmly over the seam or edge so it adheres well. Apply another layer of sealant over the top. 

Install pipe boots and collars (if needed) 

Slide pipe boots or collars over any plumbing, exhaust, or cables penetrating the roof. Secure them according to the product instructions to form a watertight seal. 

Check your work 

Once done, examine all areas to ensure complete and even coverage. Seal up any pinholes, tears, or thin spots in the flashing. For the best protection and durability, consider hiring a professional roofing contractor to inspect, maintain, or replace your roof flashing. They have the proper experience, tools, and safety equipment to do the job thoroughly. 

When to Call a Professional Roofer for Flashing Issues 

When it comes to flashing, it's always best to call a professional roofer if you have any issues. Flashing is critical to preventing leaks and water damage, so it's not something you want to DIY if you're inexperienced. Here are some of the main reasons to call a roofer for flashing problems: 

Complicated or dangerous repairs 

If flashing around skylights, chimneys, or other complex roof structures needs repair or replacement, it's best left to the pros. These areas often require custom flashing solutions and can be difficult or unsafe for DIYers to access. 

Signs of damage or leaks 

Notice water stains on ceilings, water dripping into the attic, or other signs of leaks? Call a roofer immediately to inspect and repair or replace damaged flashing before the problem worsens. They can also check for and fix any underlying issues, like damaged shingles. 

Professional inspections 

Even if you don't see any apparent problems, having a roofer inspect your flashing every few years is a good idea. They can spot issues early on and perform preventative maintenance to maximize the lifespan of your roof. It's much easier and more affordable to fix small problems now rather than major leaks or water damage down the road. 

Directorii: The Best Roofing Specialist Near You to Flash a Roof 

Understanding roof flashing is crucial for maintaining your home's integrity. These protective seals help prevent water damage in vulnerable areas like chimneys, skylights, and valleys. Proper flashing prevents expensive repairs due to rot, mold, and more. That's where Directorii steps in. We provide a platform to connect you with professional roofers near you who can install or repair your flashing expertly. Each contractor on Directorii is thoroughly vetted, licensed, and certified, with genuine reviews to ensure you receive high-quality, prompt service. Trust your roofing needs to Directorii - your gateway to professional roofing solutions.