How To Install Valley Metal On A Shingle Roof

Installing valley metal on a shingle roof is a critical task that ensures efficient water runoff and prevents leaks in areas where two roof planes intersect. The shingle roof installation process starts with safety precautions, including protective gear and stable ladder positioning. After removing old shingles and cleaning the surface, apply a 36-inch-wide ice and water shield along the valley. Install and secure metal flashing, then lay and trim shingles to overlap the flashing. Finally, inspect for gaps and perform a water test to ensure a watertight seal.

6 Steps To Install Valley Metal on A Shingle Roof

Here are the steps that roofing installers take:

1. Taking Safety Precautions

Before commencing any roofing work, prioritize safety:

• Protective Gear: Use necessary safety gear, including gloves, eye protection, and safety boots.
• Weather Conditions: Install on a clear, calm day to prevent safety hazards.
• Ladder Safety: Ensure your ladder is stable and positioned on firm ground.

2. Prepare the Roof Valley

• Remove Old Shingles and Underlayment: Tear off all shingles and underlays over the valley to expose the subdeck, inspecting whether it is in good condition or needs repairs.
• Clean the Surface: Remove any nails, obstacles, or debris to ensure smooth installation of underlays and flashing.

3. Install the Underlayment

Apply Ice and Water Shield

• Center a 36-inch-wide strip of ice and water protector membrane along the valley, temporarily tacking it in place. 
• Peel away the backing and press the membrane onto the deck, smoothing out wrinkles. 
• Overlap additional pieces by at least 6 inches, working from the eave upward.

4. Install the Metal Valley Flashing

• Cut the Metal Flashing: Measure and cut the metal valley flashing to the appropriate length, ensuring it extends beyond the eave to direct water into the gutters.
• Position the Flashing: Center the flashing over the underlayment in the valley, ensuring equal coverage on both sides.
• Secure the Flashing: Fasten the flashing by nailing along the edges, about 1 inch in, to allow for metal expansion and contraction. Overlap each metal piece by at least 6 inches, applying asphalt plastic cement under each overlap to ensure a watertight seal.

5. Install Shingles Along the Valley

• Lay the Shingles: Lay the shingles on both sides of the valley, stopping at the chalk lines to ensure proper overlap with the flashing.
• Trim the Shingles: With a utility knife, trim the shingle so that it overlaps at the chalk line along the chalk marks.
• Secure the Shingles: Place the shingles at least 2 inches from the trimmed edge to prevent water infiltration. Cut off a 2-inch triangle from the top corner of each final shingle at the valley to direct water flow. Embed the valley end of each shingle into a 3-inch-wide band of asphalt plastic cement for enhanced adhesion and waterproofing.

6. Inspect and Finalize the Installation

• Check for Proper Sealing: Check to see if the shingles are properly sealed and if there are no gaps between them and the flashing.
• Remove Debris: Clear the roof of debris caused by the installation for cleanliness and safety.
• Perform a Water Test: If feasible, gently hose down the valley area to test if the water is properly running off and if there is no leakage in shingle roof.

5 Advantages of Installing Valley Metal on A Shingle Roof

Installing valley metal on a shingle roof offers several advantages:

1. Enhanced Water Flow: Metal valleys efficiently channel water off the roof, reducing the risk of leaks and water damage.
2. Debris Shedding: Open metal valleys shed debris, snow, and ice faster than other valley types, minimizing blockages and maintenance.
3. Durability: Metal flashing withstands the elements better than shingle-only valleys, offering increased longevity and resistance to wear.
4. Leak Prevention: Metal’s impermeable nature provides a robust barrier against water infiltration, safeguarding the roof’s integrity.
5. Aesthetic Appeal: Metal valleys can enhance a roof’s visual appeal, especially when materials like copper add distinctive lines and contrast.

Incorporating metal valleys into a shingle roof system improves functionality and contributes to the roof’s overall performance and appearance.

6 Maintenance Tips for Metal Valley

Proper maintenance of metal roof valleys ensures their longevity and optimal performance. Here are key maintenance tips:

1. Regular Inspections: Inspect at least twice a year, ideally in spring and fall, to identify any signs of damage, such as dents, scratches, or loose components.
2. Debris Removal: Keep valleys clear of leaves, branches, and other debris to prevent water accumulation and potential corrosion. To reduce slipperiness and ease debris removal, it’s best to perform this task when the roof is dry.
3. Gutter and Drain Cleaning: Clean gutters and drains at least twice a year to prevent clogs, which can cause water to overflow into roof valleys and cause damage.
4. Trim Overhanging Branches: Regularly trim nearby tree branches to avoid contact with the roof, which can scratch the surface and deposit debris, leading to moisture retention and potential damage.
5. Post-Storm Checks: After significant weather events, inspect the roof valleys for damage or debris buildup to address issues promptly and maintain roof integrity.
6. Address Minor Repairs Promptly: Fix minor issues such as loose fasteners or small rust spots immediately to prevent them from escalating into more significant problems.

Adhering to these maintenance practices can ensure that your metal roof valleys remain functional and durable, effectively protecting your home from water damage.

Conclusion

In conclusion, installing valley metal on a shingle roof significantly enhances water flow, reduces the risk of leaks, and ensures longevity. Metal valleys’ durability and ability to shed debris and ice make them an excellent choice for safeguarding your roof’s integrity. Moreover, the aesthetic appeal of materials like copper can elevate the overall look of your home.

Regular inspections and debris removal are crucial to maintaining optimal performance. Clearing gutters and trimming overhanging branches can prevent water accumulation and damage. By relying on experts like Precision Roofing a trusted roofing company for proper installation and maintenance, homeowners can enjoy the full benefits of Valley Metal, ensuring their roofs remain functional and visually appealing for years.