Types of Snow Guards for Metal Roofs: A Comprehensive Guide

As winter sets in, metal roofs become susceptible to the dangers of heavy snowfall and snow storms. Without proper snow retention, accumulated snow and ice can suddenly slide off the roof, posing risks to people, property, and landscaping. This is where snow guards come in. They are essential devices designed to help manage snow loads, prevent dangerous snow slides, and ensure the roof protection of your property. In this guide, we’ll explore the different snow guard types, materials, and installation options, so you can choose the best snow retention system for your metal roof and ensure both home protection and snow guard performance.

How Snow Guards Work

Snow guards serve as barriers or points of friction that prevent snow from sliding off a roof all at once. Instead of snow breaks occurring suddenly, snow stops create a controlled release, allowing snow to melt or fall slowly, minimizing risks to property and safety. They work by creating friction or physical barriers on the roof surface, which is particularly important for metal roofs where snow can slide off easily. The placement of snow guards, whether as pad-style snow guards, strip-style snow guard strips, or more complex systems like snow fence and snow bar systems, will depend on the roof pitch, snow load, and desired snow guard visibility.

Types of Snow Guards for Metal Roofs

1. Pad-Style Snow Guards

Pad-style snow guards are small, individual units that are installed in a staggered pattern across the roof. These are typically made from materials such as plastic, rubber, or polycarbonate and are best for areas with light to moderate snow loads. They are easily installed using adhesive backing or mechanical fasteners like screws or bolts.

• Advantages:
  • Cost-effective and discreet snow guards.
  • Simple snow guard installation with adhesive or mechanically fixed fasteners.
• Disadvantages:
  • Less effective in areas with high snow loads or snow storms.
  • May need more frequent maintenance in areas with heavy snowfall.

These snow guard strips provide a low-profile snow guard that blends seamlessly with the roof surface, ensuring a subtle appearance while still providing snow retention.

2. Bar-Style (Snow Bar) Snow Guards

Bar-style snow guards consist of horizontal metal bars that run across the roof. Made from stainless steel, aluminum, or galvalume, these bars are installed using mounting brackets or clamps. They are perfect for high snow load areas or commercial buildings that experience frequent snow storms. The bars create a snow guard barrier that holds snow in place, preventing it from sliding off.

• Advantages:
  • Excellent snow load handling and snow retention.
  • Durable and long-lasting material options such as rust prevention coatings and corrosion-resistant finishes like protective coatings.
• Disadvantages:
  • More visible and may not suit every aesthetic preference.
  • Installation can be more expensive due to the mechanical fasteners and specialized snow guard system required.

Snow bar systems provide a snow retention solution that is particularly effective for roofs with steep slopes or in areas with heavy snowfall.

3. Fence-Style Snow Guards

Fence-style snow guards feature multiple horizontal tubes or rails forming a fence-like structure. These systems are ideal for steep roofs or in regions with high snow loads. They not only offer effective snow retention but also add a decorative snow guard element to your roof. Typically, these are installed using clamped seams or mounting brackets.

• Advantages:
  • High snow load handling and snow retention capabilities.
  • Decorative snow guards that enhance the roof style.
• Disadvantages:
  • Installation styles can be complex and often require professional snow guard installation.
  • Higher cost compared to other types of snow guard systems.

These guards provide both strength and beauty, offering an appealing snow guard appearance while maintaining roof safety.

4. Clamp-On Snow Guards

Clamp-on snow guards are designed for standing seam panels and other metal roofs that do not require drilling. These guards are installed by clamping directly onto the roof, allowing for easy removal and adjustment. They are ideal for homeowners who want to protect their roof without damaging the roof coating.

• Advantages:
  • Non-invasive installation that does not penetrate the roof, preserving the roof warranty.
  • Adjustable and removable, making them flexible for different snow loads.
• Disadvantages:
  • Limited snow guard compatibility with certain roof types.
  • May not offer as much snow retention in areas with extreme snow load conditions.

These guards are perfect for homeowners looking for an easy and cost-effective snow guard solution that doesn’t compromise roof integrity.

5. Screw-Down (Adhesive) Snow Guards

Screw-down or adhesive snow guards provide a permanent solution for snow retention. These guards can be installed using screws, bolts, or adhesive pads, offering robust performance for both lightweight and heavy snow load areas.

• Advantages:
  • Strong snow guard performance and reliable snow retention for high snow load regions.
  • Available in multiple materials such as stainless steel, brass, and aluminum, providing long-lasting durability.
• Disadvantages:
  • Roof penetration is required, which can risk leaks if not installed correctly.
  • Professional installation may be necessary for correct application and snow guard strength.

These snow retention devices are ideal for areas with extreme snow conditions where strong, durable snow guard systems are required.

6. Material-Based Snow Guards

• Plastic (Polycarbonate) Snow Guards: Lightweight and cost-effective, polycarbonate snow guards are great for areas with moderate snow. They offer cracking resistance and can handle snow loads, but may not perform as well under extreme weather conditions.
• Metal Snow Guards: Made from aluminum, stainless steel, and copper, metal snow guards are robust and provide excellent rust prevention and snow guard performance. These materials are ideal for harsh climates with snow load conditions.
• Rubber Snow Guards: Rubber snow guards are gentler on the roof surface, minimizing the risk of damage while still providing solid protection against snow retention needs. They are also resistant to cracking and weather damage.

Factors to Consider When Choosing Snow Guards

• Roof Type & Material: Choose the right snow guard based on your roof style and roof types, such as standing seam configurations, corrugated panels, or concealed fasteners.
• Climate & Snow Load: Make sure the snow guard system you select can handle your area’s typical snow load and snow retention needs.
• Aesthetic Preferences: Consider whether you prefer discreet snow guards or decorative snow guards based on your roof’s appearance.
• Installation Method: Decide between adhesive, mechanically fixed fasteners, or clamp attachment for the snow guard installation process.
• Budget Considerations: Balance your snow guard pricing with the snow retention system that best suits your roof protection requirements.

Installation & Maintenance Tips

Proper Placement: Accurate snow guard placement is crucial to ensure snow retention while maintaining the roof surface integrity. Strategic positioning helps maximize effectiveness and prevents premature wear.

Professional Installation: Opt for professional installation to guarantee proper alignment, and snow guard compatibility, and prevent roof damage during setup. Experts ensure snow guard strength and performance under varying snow loads.

Regular Inspections: Periodically inspect your snow guard system for damage, wear, or loose components, especially after snow storms or heavy snowfall. Routine checks help maintain optimal snow retention and prevent potential roof issues.

Snow Guard Reattachment: If you notice any loosening or shifting, snow guard reattachment should be done immediately to avoid reduced snow guard protection. Timely action ensures your roof remains protected from snow loads.

Seal and Protect: Apply a protective coating or roof coating over the snow guards to shield them from harsh weather, ice, and UV damage. This helps extend the life of your snow retention system and maintains its durability over time.

Selecting the right snow guard for your metal roof is crucial for ensuring snow retention, maintaining roof safety, and preventing damage. Whether you opt for pad-style snow guards, snow bar systems, or clamp-on systems, be sure to consider your roof pitch, snow load conditions, and snow guard performance needs. Consulting with professionals for snow guard selection and snow guard installation will ensure you get the best snow retention solution for your home.