Guide to Flashing on Roof: What to Know About Roof Flashing in Maryland
You’ve probably heard about shingles, gutters, and even ventilation when it comes to roofing, but what about flashing? Many homeowners aren’t familiar with this critical component—until they start experiencing leaks. Roof flashing plays a crucial role in keeping your home dry by preventing water from seeping into vulnerable areas. Without it, even the best roofing materials can fail.
If you’re dealing with an aging roof, planning a replacement, or simply want to prevent expensive repairs, understanding flashing is essential. Knowing what it does, the different types available, and how to spot potential issues can save you from major headaches down the road. In this guide to flashing on roof systems, we’ll cover what to know about roof flashing, the different types available, common problems, and how professional installation can make all the difference for homeowners in Maryland.
What Is Roof Flashing and Why Does It Matter?
Flashing is a thin, durable material—typically aluminum, steel, or copper—installed in areas where the roof meets another surface. It prevents water from infiltrating seams and joints, directing it safely away from the home.
Even if you have high-quality shingles, your roof can still develop leaks if flashing is missing or installed incorrectly. Over time, exposure to rain, wind, and temperature changes can weaken flashing, making it essential to keep an eye on its condition. Proper installation and maintenance are key to ensuring that your home stays protected from water damage, especially in Maryland’s unpredictable weather.
What to Know About Roof Flashing: Types and Their Uses
Not all flashing is the same. Different parts of the roof require specific types to ensure proper water management. Here are the most common types of roof flashing and their functions.
Step Flashing
Step flashing is used where a sloped roof meets a vertical surface, such as a wall or chimney. It consists of small metal pieces layered between shingles in a stair-step pattern. This method ensures water is directed away from the intersection, preventing leaks where walls and roofs meet.
Valley Flashing
Valleys are the areas where two roof slopes meet, creating a natural channel for water runoff. Valley flashing is installed beneath shingles in these areas to prevent water from pooling and causing damage. Without proper valley flashing, heavy rain can quickly overwhelm these points, leading to leaks and deterioration.
Chimney Flashing
Chimneys are one of the most vulnerable points on a roof. Chimney flashing consists of multiple components, including step flashing along the sides and a continuous metal apron at the front and back. If chimney flashing fails, water can easily seep into the home, causing interior damage.
Drip Edge Flashing
Drip edge flashing is installed along the edges of the roof, guiding water into the gutters instead of allowing it to run down the fascia or siding. This type of flashing is crucial in preventing wood rot and extending the lifespan of your roof’s edge.
Vent Pipe Flashing
Any vent or pipe protruding through the roof requires flashing to prevent leaks around the opening. This type of flashing typically includes a metal base with a rubber or silicone boot that forms a tight seal around the pipe. Over time, the rubber can crack due to UV exposure, so regular inspections are necessary.
Counter Flashing
Counter flashing is used in conjunction with step flashing to create a watertight seal. It is often installed on masonry surfaces like chimneys, where it overlaps step flashing to provide an extra layer of protection against moisture.
Common Roof Flashing Problems and How to Prevent Them
Flashing is durable, but it isn’t indestructible. Over time, it can deteriorate, loosen, or develop issues that compromise its ability to protect your home. Recognizing these problems early can save you from costly repairs.
Rust and Corrosion
Metal flashing, particularly steel, is prone to rust if not properly coated or maintained. Corrosion weakens the material, making it more susceptible to leaks. Choosing rust-resistant materials like aluminum or copper can prevent this issue, as can regular inspections to catch early signs of damage.
Loose or Missing Flashing
Strong winds, heavy rain, and improper installation can cause flashing to shift or detach over time. If flashing is missing, water can easily find its way into your home. A professional roofer can assess your roof for any loose or missing sections and secure them properly.
Cracked Sealant
Many flashing installations rely on sealants to reinforce the connection between materials. However, over time, these sealants can dry out, crack, or shrink, leaving gaps that allow water to seep through. Reapplying sealant when necessary ensures that flashing continues to perform effectively.
Poor Installation
One of the biggest causes of flashing failure is improper installation. If flashing isn’t secured correctly or the wrong type is used, it won’t provide adequate protection. This is why working with an experienced roofing contractor is so important.
How MARS Restoration Ensures Proper Roof Flashing Installation
At MARS Restoration, we understand that even the best roofing materials won’t perform well without properly installed flashing. That’s why we take extra care to ensure flashing is placed correctly, sealed properly, and built to last.
Expert Installation for Leak Prevention
Our team follows industry best practices to install flashing with precision. Whether it’s step flashing for a chimney or valley flashing for a high-water runoff area, we ensure everything is fitted securely to provide long-term protection.
Comprehensive Inspections to Catch Issues Early
If you’re unsure whether your flashing is in good condition, we can help. Our roof inspections include a detailed examination of all flashing areas, allowing us to identify potential weak points before they turn into costly problems.
Reliable Repairs and Replacements
Flashing that is rusted, loose, or missing needs immediate attention. Our team specializes in repairing and replacing damaged flashing to restore its protective function. Whether it’s reinforcing an old chimney flashing system or sealing a leaking valley, we have the expertise to handle it.
When to Call a Professional for Roof Flashing Repairs
While some homeowners attempt DIY repairs, flashing installation and repairs require precision. A small mistake can lead to major water damage, so it’s best to call a professional in certain situations:
- Water stains appear inside your home, especially near walls or ceilings
- You notice missing or visibly damaged flashing
- Your roof has been exposed to severe weather, and you want to ensure everything is intact
- You’re planning a roof replacement and want to make sure flashing is installed correctly
An experienced roofer has the tools and knowledge to install and repair flashing the right way, ensuring maximum protection for your home.
Schedule a Roof Inspection with MARS Restoration
If you’re concerned about the condition of your roof flashing, now is the time to schedule an inspection. Our team will assess your roof, identify any problem areas, and recommend the best solutions to keep your home dry and protected.
Don’t wait until a small issue turns into a costly repair. Contact us today to schedule a professional roof inspection. Call 240-319-7311 or email info@marsrestoration.com to book your appointment.