How to Install Standing Seam Metal Roofing for Valleys (A Major Part of Your Roof)

Standing-seam metal roofing is a great option for many homes. It’s durable, long-lasting, and can add value to your home. But if you’re planning to install standing seam metal roofing on your home, it’s important to know how to install valleys correctly.

In this article, we’ll show you how to install standing seam metal roofing for valleys.

Table of contents

What is standing seam metal roofing?

Standing seam metal roofing is a type of roofing system characterized by vertical metal panels that have raised seams running vertically along the length of the panels.

The seams are interlocked and raised above the level of the roofing panel, creating a distinctive ribbed appearance.

This design provides several advantages, including enhanced durability, weather resistance, and a sleek, modern aesthetic.

The raised seams also help prevent water leakage, making standing seam metal roofing a popular choice for residential and commercial buildings.

What materials are used for standing seam metal roofing?

Standing seam metal roofing is typically made from durable and weather-resistant materials such as steel, aluminum, or copper.

Steel is the most common choice due to its strength and affordability.

Aluminum is also popular for its lightweight nature and corrosion resistance, making it suitable for coastal areas.

Copper is less common but valued for its unique aesthetic appeal and long lifespan.

These materials are available in various thicknesses (gauges) to accommodate different structural requirements and design preferences.

Coatings, such as paint or specialized finishes, are often applied to the metal panels to enhance their durability, color options, and resistance to fading or chipping.

What type of flashing is used for valleys?

For valleys in standing seam metal roofing, a type of flashing called “valley flashing” is typically used.

Valley flashing is designed to direct water away from the joint where two roof slopes meet in a valley. It helps prevent water penetration and protects the underlying structure from potential damage.

Valley flashing for standing seam metal roofing is usually made from the same material as the roofing panels, such as steel, aluminum, or copper.

The flashing is custom-formed to match the profile of the standing seam panels and is installed along the valley, following the contour of the roof.

It is installed under the metal roofing panels and over the roofing underlayment or waterproofing membrane to create a watertight seal.

Valley flashing may also incorporate additional features such as ribs or channels to facilitate water flow and prevent pooling or damming.

Proper installation and alignment of the valley flashing are crucial to ensuring effective water shedding and maintaining the integrity of the roofing system.

How to install standing seam metal roofing for valleys

Installing standing seam metal roofing for valleys requires careful attention to detail and proper techniques to ensure a watertight and durable installation. Here are the general steps for installing standing seam metal roofing in valleys:

Step 1: Preparation

Start by preparing the roof deck and underlayment according to the manufacturer’s instructions. Ensure the roof deck is clean, dry, and free of any debris or protrusions.

Step 2: Valley flashing installation

Install the valley flashing, which is typically a pre-formed metal piece designed specifically for valleys. Begin by positioning the valley flashing at the bottom of the valley, aligning it with the slope of the roof. Secure the valley flashing to the roof deck using the appropriate fasteners recommended by the manufacturer.

Step 3: Metal panel installation

Install the standing-seam metal panels on either side of the valley. Begin at the eave and work your way up the roof. Trim the metal panels to the appropriate length and width, allowing for an overhang on both sides of the valley.

Step 4: Interlocking the panels

As you install the metal panels, ensure that the standing seams interlock properly. The seams should align and interlock securely, forming a watertight connection. Use a seaming tool or machine to crimp the seams together according to the manufacturer’s specifications.

Step 5: Valley protection

Apply a sealant or caulking compound along the edges and seams of the valley flashing to create a watertight seal. This helps prevent water from entering the valley and ensures proper drainage.

Step 6: Trim and finishing

Install the appropriate trim pieces along the edges of the valley and where the metal panels meet the valley flashing. This provides a finished look and further helps to prevent water infiltration.

Step 7: Quality check

Inspect the installation carefully to ensure that all panels are properly aligned, seams are securely interlocked, and the valley flashing is correctly sealed. Check for any gaps, loose fasteners, or potential areas of water entry.

What to consider when installing standing seam metal roofing for valleys

When installing standing seam metal roofing for valleys, several considerations should be kept in mind to ensure proper installation and long-term performance:

Valley design: Determine the appropriate valley design for the specific roof configuration. The two common types of valleys used with standing seam metal roofing are open valleys and closed valleys. Open valleys expose the metal flashing in the valley, while closed valleys have the metal panels covering the entire valley area. Choose the design that best suits the aesthetic and functional requirements of the roof.
Flashing material: Select the right material for the valley flashing, considering factors such as compatibility with the metal roofing panels, corrosion resistance, and durability. Ensure that the flashing material matches or exceeds the thickness of the roofing panels to maintain consistency and prevent potential issues.

Flashing dimensions: The size and dimensions of the valley flashing should be carefully measured and calculated to fit the specific roof dimensions and pitch. Properly sized valley flashing is essential for efficient water shedding and preventing water accumulation or leakage.
Underlayment: Install a high-quality underlayment or waterproofing membrane beneath the valley flashing. This layer acts as an additional barrier against water penetration, providing extra protection to the roof structure in case of any potential leaks.
Proper installation techniques: Ensure that the valley flashing is correctly installed according to the manufacturer’s guidelines and best industry practices. This includes proper alignment, securing the flashing with appropriate fasteners, and integrating it seamlessly with the surrounding roofing components.

Water flow considerations: Consider the direction of water flow in the valley and ensure that the valley flashing is installed in a way that directs water away from vulnerable areas and towards the roof drainage system.
Sealing and waterproofing: Use appropriate sealants or adhesives to create a watertight seal where the valley flashing meets the roofing panels and other adjacent components. This helps prevent water infiltration and ensures the longevity of the roofing system.

How do you ensure a standing seam metal roof installation is leak-proof?

To ensure a leak-proof standing seam metal roof installation, the following measures can be taken:

Quality materials: Start by using high-quality materials, including metal panels, flashing, underlayment, and sealants. Choose materials that are specifically designed for standing seam metal roofing and are known for their durability and weather resistance.
Proper installation techniques: Follow the manufacturer’s installation guidelines and industry best practices. Ensure that the panels are properly aligned, securely fastened, and interlocked to form tight seams. Pay special attention to critical areas such as valleys, roof penetrations, and transitions to ensure proper sealing.
Flashing and waterproofing: Install flashing correctly, including valley flashing, sidewall flashing, and any other necessary flashings. Use compatible materials and proper techniques to ensure watertight seals between the flashing and the roofing panels. Additionally, install a high-quality underlayment or waterproofing membrane beneath the roofing panels to provide an additional layer of protection against leaks.

Sealant application: Use sealants or adhesives in accordance with the manufacturer’s instructions to seal joints, seams, and transitions. This includes sealing the panel seams, ridge caps, sidewall flashing, and any other potential points of water entry. Regularly inspect and maintain the sealant to ensure its effectiveness over time.
Proper slope and drainage: Ensure that the roof has an adequate slope to facilitate water runoff. Standing seam metal roofs typically require a minimum slope of 3:12 (14 degrees) to effectively shed water. Properly design the roof’s drainage system, including gutters and downspouts, to effectively carry away water from the roof surface
Professional installation: Hiring an experienced and qualified roofing contractor is crucial for a leak-proof installation. Professionals who specialize in standing seam metal roofing will have the knowledge, skills, and expertise to properly install the roof, ensuring all the necessary steps are taken to prevent leaks

Regular maintenance and inspections: Perform regular inspections and maintenance to identify and address any potential issues early on. Keep the roof clean, remove debris, and promptly repair any damage or signs of wear. Regularly check the sealants and flashings to ensure their integrity.

What kind of special tools are needed for standing seam roofing?

Installing standing seam roofing requires a specific set of tools to ensure proper installation and achieve the desired results. Some of the special tools commonly used for standing seam roofing include:

Seamers: Seamers are essential tools used to crimp or seam the standing seam panels together. There are different types of seamers, such as hand seamers, mechanical seamers, or power seamers, depending on the scale of the project and the desired level of efficiency.

Metal shears or snips: Metal shears or snips are used to cut the metal panels to the desired length or shape. These tools have specialized blades designed to cut through metal with precision.
Seam rollers: Seam rollers are used to smooth and flatten the seams after they have been crimped or seamed. They help ensure a tight and secure connection between the panels.
Roofing nippers: Roofing nippers are pliers-like tools used for cutting or shaping metal panels, particularly for making detailed cuts around obstructions or tight spaces.

Hemming tools: Hemming tools are used to create hems or folds along the edges of the metal panels. This process enhances the strength and stability of the panels while also providing a finished appearance.
Standing seam roofing tools: There are specialized tools designed specifically for standing seam roofing, such as panel benders, panel cutters, seaming pliers, and panel notching tools. These tools help in bending panels, cutting notches, or making intricate adjustments during the installation process.
Roofing seam probes or gauges: Seam probes or gauges are used to measure the width and height of the seams, ensuring consistency and accuracy throughout the installation. They help maintain uniformity and achieve proper panel alignment.

Power tools: Common power tools such as drills, impact drivers, and nibblers may be required to facilitate the installation process, including drilling holes for fasteners or making precise cuts in the metal panels.
Safety equipment: Safety equipment, such as gloves, safety glasses, and fall protection gear, should always be used when working at heights or handling sharp metal components.

What accessories are needed for a standing seam metal roof installation?

When installing a standing seam metal roof, several accessories are essential to ensure proper functionality, aesthetics, and weather resistance.

These accessories include ridge caps, which cover and seal the ridge line where roof slopes meet, providing a finished appearance and protection against water infiltration.

Eave trim, or drip edge, is used along the roof’s eaves to create a clean edge and direct water away from the fascia, preventing water damage.

Valley flashing directs water away from roof valleys, reducing the risk of leaks and ensuring proper water shedding.

Sidewall flashing is installed at wall junctions to create a watertight seal and protect against water intrusion.

Gable trim is applied to the gable ends of the roof, giving a neat and finished look while covering and protecting the exposed edges of the metal panels.

In areas prone to heavy snowfall, snow guards or snow retention systems can be installed to prevent sudden snow slides and evenly distribute the snow.

Roof ventilation components, such as ridge vents or roof vents, ensure proper airflow and ventilation in the attic space, regulating temperature and reducing moisture buildup.

Sealants and adhesives are used to create watertight seals at joints, seams, and transitions, preventing water infiltration.

Properly selected fasteners, such as screws or clips, are used to secure the metal panels to the roof structure.

A roofing underlayment or waterproofing membrane is installed beneath the metal panels as an additional layer of protection against water infiltration.

What safety precautions should be taken when installing a standing-seam metal roof?

When installing a standing-seam metal roof, it is crucial to prioritize safety. Here are some essential safety precautions to consider:

Personal protective equipment (PPE): Wear appropriate PPE, including safety glasses or goggles, work gloves, a hard hat, and slip-resistant footwear. Additionally, consider using a safety harness and fall protection equipment when working at heights.

Ladder safety: Use a sturdy and properly positioned ladder when accessing the roof. Ensure that the ladder is on stable ground, securely placed, and follow proper ladder safety practices. Consider having a spotter or helper stabilize the ladder while you climb.
Roof safety: Take precautions when working on the roof. Be aware of potential hazards, such as slippery surfaces, sharp edges, or unstable footing. Use caution when moving around, especially on steep-slope roofs. Consider using roof brackets or temporary roof anchors to provide secure anchorage points and prevent falls.
Weather conditions: Pay attention to weather conditions. Avoid working on the roof during adverse weather, such as high winds, rain, or storms, as it can increase the risk of accidents and injuries. Ensure proper lighting when working in low-light conditions.

Tool safety: Use tools and equipment properly and follow manufacturer instructions. Keep tools in good condition, inspecting them before use to ensure they are functioning correctly. Use tools specifically designed for the task at hand to minimize the risk of accidents.
Electrical safety: Be cautious of nearby power lines and electrical hazards. Keep tools and equipment away from electrical sources, and ensure proper grounding of any electrical equipment used during the installation.
Material handling: Take care when handling metal panels, accessories, and other roofing materials. Use proper lifting techniques to prevent strain or injury. Avoid overloading the roof with excessive materials, which can compromise the roof’s structural integrity.

Communication and coordination: If working as part of a team, maintain clear communication and coordination to ensure everyone’s safety. Assign specific roles and responsibilities, establish a system for signaling or alerting others, and have an emergency plan in place.
Training and experience: Ensure that the individuals involved in the installation are properly trained and experienced in working with standing seam metal roofs. If needed, consider hiring professional roofing contractors who specialize in this type of roofing system.
Building codes and regulations: Adhere to local building codes and regulations regarding safety requirements for roof installations. Familiarize yourself with any specific guidelines or restrictions in your area.

Can you install standing seam metal roofing yourself?

Installing standing seam metal roofing yourself is a possibility, but it is a challenging task that requires specialized skills, experience, and knowledge of the roofing trade.

It involves precise measurements, cutting and shaping metal panels, aligning and interlocking them correctly, and sealing joints.

If you have prior experience with roofing installations and feel comfortable working at heights, you may have the necessary skills. However, without the proper expertise, you risk improper installation and damage to the roofing materials. Additionally, acquiring specialized tools and equipment can be costly.

Safety considerations are paramount when working on a roof. You need to ensure you have the appropriate safety equipment, such as harnesses and fall protection gear, and take precautions to prevent accidents and injuries.

Familiarize yourself with local building codes and permits as well, as they may apply to roofing installations. It’s crucial to comply with these regulations to meet safety standards and legal requirements.

It’s important to note that installing the roof yourself may void manufacturer warranties or roofing system warranties.

Moreover, if any damage occurs during or after the installation, you may not have insurance coverage to address the issue.

Hiring a professional roofing contractor is advisable, as they have the expertise, tools, and knowledge to ensure a proper and durable installation.

They also carry liability insurance, providing protection in the event of accidents or property damage. By doing so, you save time, effort, and potential complications associated with a complex roofing project.

How long do standing-seam metal roofs last?

Standing seam metal roofs are known for their exceptional durability and longevity. When properly installed and maintained, they can last 40 to 70 years or even longer.

The caliber of the materials used, the methods of installation, the climate, and maintenance procedures all have an impact on a standing seam metal roof’s lifespan.

Regular inspections, cleaning, and addressing any necessary repairs can help extend the lifespan of a standing seam metal roof, making it a durable and long-lasting roofing option.

What are the major benefits of standing seam roofing for valleys?

Standing seam roofing offers several benefits for valleys, including enhanced water shedding and superior weather resistance.

The raised seams of the standing seam roofing panels provide a continuous, uninterrupted surface, minimizing the risk of water penetration and leaks in valleys.

The design of standing seam roofs also allows for better drainage, ensuring that water flows smoothly off the roof without pooling or accumulating in the valleys.

This helps to prevent water damage, reduce the likelihood of roof leaks, and prolong the lifespan of the roofing system.

What are the risks associated with standing seam roofing for valleys?

While standing seam roofing offers many advantages, there are some risks associated with its use in valleys.

One potential risk is improper installation or inadequate sealing of the valley flashing, which can lead to water infiltration and subsequent leaks.

Valleys are critical areas prone to water accumulation, and if the flashing is not installed correctly, it can result in water damage to the roof structure and interior of the building.

Also, if the roof is not properly maintained or if debris accumulates in the valleys, it can impede water flow and increase the risk of leaks and potential water damage.

Therefore, it is essential to ensure proper installation and ongoing maintenance to mitigate these risks and maximize the benefits of standing seam roofing in valleys.

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Author: Logan

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