Snow sliding off a pole barn roof may look impressive, but avalanches can be dangerous. When snow and ice accumulate, they can damage gutters and pose a serious risk to people or parked vehicles below.
Snow guards are used to control the movement of snow and ice on metal roofing systems. Often, property owners skip this post-frame building feature during the initial build. Some don’t like the look. Others assume they won’t need it, or decide to “see how the pole barn roof performs” through the first winter.
But the first snowfall has a way of changing minds. After experiencing full-on avalanches or replacing broken gutters, many property owners realize snow retention isn’t about aesthetics—it’s about safety and protection.
The good news? This blog explains how to install snow guards on an existing pole barn roof.
How to Install Snow Guards on an Existing Pole Barn Roof
A pole barn snow guard, also called a snow brake or snow rail, is a retention device that controls the release of snow and ice from a metal roof.
Each manufacturer provides specific installation instructions. Follow their guidelines, especially when working with different metal panel profiles and fasteners. Improper installation can reduce effectiveness and cause structural issues.
Evaluate the metal roof to ensure proper snow guard placement, secure attachment, and long-term protection of your roof system.
What is a Pole Barn Snow Guard?
A pole barn snow guard, also called a snow brake or snow rail, is a retention device designed to control the release of snow and ice from a metal roof.
They prevent large sheets from suddenly sliding off post-frame buildings. Instead, they help distribute loads and promote slower, more controlled melting.
Imagine exiting a commercial post-frame building in business attire, only to have snow slide off the metal roofing panels onto you. Snow guards help prevent these dangerous releases, protecting people and property and reducing liability risk.
Pole barn snow guards are installed along the eaves of post-frame buildings and come in various types. Aluminum and stainless steel are the most popular building materials due to their strength and durability.
There are two types of snow guards you can install on your existing post-frame building.
1) Snow Defender® 1500
The Snow Defender 1500 is a high-quality snow guard manufactured by Levi’s Building Components. These rooftop devices are staggered across the metal roof to provide maximum snow retention.
This type of pole barn snow guard is made from Type 304 Stainless Steel and powder-coated for long-lasting performance. Each brake features an EPDM rubber seal on the bottom, eliminating the need for caulking.
Proudly USA-made, the Snow Defender 1500 comes with a 15-year warranty.
2) ColorGard® Snow Retention System
The S-5! ColorGard Snow Retention System by McElroy Metal features a continuous rail installed along the eave near the gutters. This design controls roof avalanches and releases snow in smaller, safer amounts.
The ColorGard Snow Retention System is constructed from aluminum and stainless steel components. It’s designed to match your metal roofing panels using an integrated color strip, making it a great fit for both new and existing post-frame buildings.
Can You Install Snow Guards on an Existing Pole Barn Roof?
Most snow guard systems are designed for retrofit installation, meaning they can be added after the initial post-frame construction without removing existing metal roofing panels.
Proper installation of pole barn snow guards is essential for long-term performance, metal roof protection, and overall safety.
Snow guards are typically staggered above the eaves to control snow and ice movement, but correct placement depends on several factors, including:
- Roof pitch
- Roof length
- Metal panel profile and fastening system
- Local snow load requirements
Moreover, local snow load requirements vary significantly by region. For example, areas like Upper Michigan experience heavier snowfall than regions like southern Indiana. These differences affect how and where snow guards should be spaced on a post-frame building.
Ignoring these factors during snow guard installation can lead to costly pole barn repairs, such as broken gutters, cracked roof purlins, and sagging trusses. Not to mention, improper placement can increase liability risk if snow or ice falls onto people, vehicles, or walkways below.
Taking the time to assess these factors helps ensure snow guards protect the metal roof, prevent accidents, and maintain the structural integrity of your post-frame building.
How to Install Snow Guards on an Existing Pole Barn Roof
Editor’s Note: Each snow guard manufacturer provides specific installation instructions. Follow their guidelines, especially when working with different metal panel profiles and fastening systems. Improper installation can reduce effectiveness and lead to structural issues.
In this how-to video, our post-frame construction crew installs pole barn snow guards on a commercial post-frame building.
Step 1: Evaluate Your Pole Barn Roof
Before installing pole barn snow guards, thoroughly evaluate your metal roof to ensure correct placement.
The pitch of a metal roof affects the number of rows needed, and the length determines the number of snow guards per row.
Identify the type and profile of your metal roof. For instance, exposed-fastener metal roofing differs from standing seam panels and requires different snow guard attachment methods.
Consider the typical snow loads in your area, since regional climate directly influences snow guard placement and spacing requirements.
Step 2: Plan the Placement of Pole Barn Snow Guards
Once you’ve evaluated your metal roof, it’s time to plan where the pole barn snow guards will be placed.
This post-frame building feature is installed in rows above the eaves, focusing on high-traffic areas such as entrances, walkways, and areas near vehicles.
The layout may be staggered or continuous, depending on the type of pole barn snow guard.
After deciding on the placement of your pole barn snow guards, mark the precise attachment points. Using a chalk line or measuring tape ensures proper spacing and alignment for effective snow retention.
Step 3: Install the Pole Barn Snow Guards
Next, the installation process depends on the type of pole barn snow guard. Please refer to the table below.
| Screw-Down Snow Guards | Drill pilot holes in the steel rib, apply sealant, and secure each snow guard with screws. Avoid overtightening, as it could damage the metal panel. |
| Clamp-On Snow Guards | Commonly used with standing seam metal roofs. Attach directly to the seams without penetrating the steel. |
| Adhesive-Based Snow Guards | Pay close attention to temperature and curing time to ensure a strong bond. |
Correct installation prevents metal roof leaks, improves long-term performance, and ensures pole barn snow guards protect property and people below.
Step 4: Inspect and Maintain the Pole Barn Snow Guards
After installation, inspect the snow retention system to confirm proper alignment and secure attachment.
In the spring, check fasteners and sealant as part of routine pole barn maintenance. Tighten or replace loose or damaged components as needed.
Regular post-frame building inspections help maintain structural integrity and protect the metal roof system.
Are You Ready to Install Snow Guards on Your Pole Barn Roof?
Installing snow guards on an existing pole barn roof is a smart investment in long-term protection and safety. With the right snow retention system, you can control avalanches, protect property or people, and minimize liability risk.
If you’re unsure which snow guard is best for your post-frame building, consult with our Repair and Renovation Specialists. Our experienced team understands metal roofing systems and has in-house capabilities to ensure load snow load requirements are properly met.
Do you have more questions that aren’t covered in this article? If you need help with design and planning, contact FBi Buildings at 800.552.2981 or click here to email us. If you’re ready for a price, click here to request a quote, and a member of our Customer Engagement Team will help you determine the next steps.