How To Flash A Roof Against Brick Wall

How to Flash a Roof Against a Brick Wall

To guard against water penetration and damage, it is crucial to properly flash a roof where it meets a brick wall. Inadequate flashing can lead to leaks, mold, and structural issues. This article will explore the essential aspects of flashing a roof against a brick wall, providing a comprehensive guide to ensure a watertight seal.

Step 1: Preparation

Before installing flashing, ensure the roof surface and brick wall are clean and dry. Remove any debris or vegetation that could interfere with the bond. Mark the location where the flashing will be installed and measure the length of the area to be covered.

Step 2: Install Base Flashing

Base flashing is a continuous strip of metal or self-adhesive membrane that provides the primary water barrier between the roof and the wall. Position the base flashing over the roofing material, extending it up the brick wall by at least 6 inches. Secure it with roofing nails or adhesive.

Step 3: Install Step Flashing

Step flashing creates individual seals for each row of shingles. Cut pieces of step flashing to the length of the shingles, allowing for a 2-inch overlap with the base flashing. Insert the lower edge of the step flashing under the shingles and slide the upper edge up the brick wall, overlapping the base flashing.

Step 4: Seal Joints and Penetrations

Use a high-quality sealant to waterproof all joints and penetrations in the flashing system. Apply a generous bead of sealant along the edges of the flashing where it meets the roof and wall. Additionally, seal any openings for pipes or vents.

Step 5: Counter Flashing

Counter flashing is an optional but recommended layer of protection. It is a piece of metal installed over the step flashing, covering the exposed portion of the base flashing. Counter flashing prevents water from entering the space between the flashing and the brick wall.

Conclusion

By following these essential aspects, you can effectively flash a roof against a brick wall, ensuring a watertight seal that will protect your home from damage. Proper flashing techniques are vital for maintaining the integrity of your roof and preventing costly repairs in the future.