Best Way to Shingle a Valley

Shingling a valley requires precision and good materials to ensure water runs off properly. It’s essential for preventing leaks and damage.

Materials and Tools Needed

• Asphalt Shingles
• Hammer and Nails
• Utility Knife
• Chalk Line
• Roofing Cement
• Roofing Underlayment
• Safety Gear

Start by gathering all necessary materials and tools. Look for quality shingles designed for valleys. Asphalt shingles are a popular choice.

Prepare the Valley

Ensure the roof is clean and dry. Install a layer of roofing underlayment starting from the eaves, extending it up the roof edges and into the valleys. This acts as a protective layer.

Next, you need to prepare your shingles. Cut them into manageable sizes with a utility knife. This will make laying them easier and safer.

Line and Secure the Underlayment

Lay a self-adhering underlayment or ice and water shield in the valley. Ensure it adheres smoothly without wrinkles or air pockets. Focus on tight adherence, especially around the edges.

Use roofing nails to secure the underlayment in place. Ensure you avoid nailing too close to the valley center to avoid leaks.

Choosing a Shingling Method

There are two common methods for shingling valleys: the closed valley method and the open valley method. Each has its own advantages.

Closed Valley Method

In the closed valley method, shingles from both roofs are woven into the valley. It provides a continuous surface for water runoff. Start at the bottom of the valley, lay a shingle from one side of the roof, extending onto the valley. Follow this by laying a shingle from the other side over it. Continue doing this, overlapping each successive shingle by about 6 inches.

Open Valley Method

The open valley method involves leaving a clearly visible channel down the valley, usually lined with metal. This can be more effective in heavy rainfall areas. Begin by installing a metal flashing in the valley after the underlayment is secure. Lay shingles up to the edge of the flashing, cutting them precisely. Leave about 2 inches of the metal flashing exposed in the center of the valley.

Mind the Overlaps

In both methods, ensure adequate shingle overlap. This directs water away from the valley effectively. Pay particular attention to the intersection points, ensuring they are tightly sealed with roofing cement to avoid water penetration.

Trim Excess Material

Once the shingles are in place, trim any excess material. Use a utility knife to achieve clean, straight edges. Discard these trimmed pieces safely.

Check for Vulnerable Spots

Inspect the valley for any potential weak spots. Look out for areas where shingles seem loose or improperly adhered. Re-secure these areas with nails and a dab of roofing cement if needed.

Finishing Touches

Give the entire valley another inspection. Ensure that the overlap and coverage are even and continuous. Any gaps could potentially lead to leaks, so it’s vital to catch these early.

Safety Considerations

Wear proper safety gear when working on the rooftop. Ensure that your footing is secure, especially when dealing with steep slopes. If the work feels too risky, consider hiring a professional.

Regular Maintenance

Check your shingles periodically, especially after severe weather. Promptly address any signs of wear or damage. Keeping the valley clear of debris also helps in maintaining proper water flow.

Shingling a valley correctly ensures that water flows away from critical areas of your roof, protecting your home. By following these steps, you can achieve a durable and effective roof valley.