Dealing With Snow Load On Your Greenhouse

Snow can be a picturesque sight, but when it starts accumulating on your greenhouse, it can quickly become a cause for concern. The weight of snow can pose a serious threat to the structural integrity of your greenhouse, potentially leading to collapsing roofs or damaged plants. As a greenhouse owner, it’s essential to understand how to deal with the snow load effectively. In this article, we will explore some practical tips and strategies to protect your greenhouse from the burden of snow, ensuring the safety of your beloved plants and the longevity of your structure. So grab your shovel and let’s get started!

Dealing With Snow Load On Your Greenhouse

Understanding Snow Load on Greenhouses

What is snow load?

Snow load refers to the weight or pressure exerted by the accumulation of snow on a structure, such as a greenhouse. The weight of snow can exert a significant force on the roof and walls of a greenhouse, which can potentially lead to structural damage if not properly managed. Understanding snow load and its potential impact is essential for greenhouse owners to ensure the safety and longevity of their structure.

Factors affecting snow load on a greenhouse

Several factors influence the snow load on a greenhouse. The primary factor is the amount of snowfall in a given area. Regions with heavy snowfall are more prone to higher snow loads. Other factors include the shape and design of the greenhouse, as well as the slope and material of the roof. The orientation of the greenhouse with respect to prevailing winds can also affect the accumulation and distribution of snow.

Importance of understanding snow load

Understanding snow load is crucial for greenhouse owners to make informed decisions about structural design, maintenance, and snow load management. Failing to consider the potential snow load on a greenhouse can lead to catastrophic structural failures that not only result in financial losses but also pose significant risks to the safety of individuals working inside the greenhouse. Therefore, gaining knowledge about snow load and its implications is vital for responsible greenhouse ownership.

Assessing Your Greenhouse’s Snow Load Capacity

Determining the design snow load

The design snow load is a standardized value that is determined based on the location of the greenhouse and the specific requirements set by local building codes or engineering standards. Consulting with a structural engineer or reviewing local building codes can help determine the design snow load that should be considered for your greenhouse. It is important to note that the design snow load may vary depending on your region’s specific climatic conditions.

Calculating the total snow load on your greenhouse

To calculate the total snow load on your greenhouse, you need to consider both the design snow load and the snow load from actual snow accumulation. The snow load from actual snow accumulation can be estimated by multiplying the weight of snow per unit volume with the volume of snow that has accumulated on the roof and walls. This calculation can be complex, and it is recommended to seek professional assistance or use specialized software to accurately estimate the total snow load.

Inspecting the greenhouse structure

Regular inspections of the greenhouse structure are essential to identify any signs of stress, damage, or potential weaknesses that may compromise its ability to withstand snow load. Inspecting the roof, walls, and support beams for signs such as sagging, cracks, or deformation is crucial. Any identified issues should be addressed promptly to ensure the structural integrity of the greenhouse and minimize the risk of snow load-related failures.

Preventing Snow Build-up on the Roof

Removing excess snow from the roof

Regularly removing excess snow from the roof is one of the most effective ways to prevent snow load-related issues. However, it is crucial to do this safely and efficiently to avoid causing damage to the greenhouse. It is recommended to use long-handled roof rakes or snow brooms to carefully remove the snow from the roof without applying excessive force. Avoid using sharp objects that can puncture or damage the roof material.

Using roof rakes or snow brooms

Roof rakes or snow brooms are specially designed tools that allow you to remove snow from the roof while standing on the ground or from a ladder. These tools typically have long handles and a wide scraping or brushing surface that helps in gently and effectively clearing off the snow. When using a roof rake or snow broom, start from the edge of the roof and work your way upward, being mindful of any potential hazards such as falling icicles.

Hiring professionals for roof snow removal

In cases where the snow accumulation on the roof is too heavy or too dangerous to remove by yourself, it is recommended to hire professionals who specialize in roof snow removal. These professionals have the necessary equipment and expertise to safely clear the snow from the roof without causing damage to the greenhouse structure. Hiring professionals not only ensures the safety of the individuals performing the task but also minimizes the risk of accidental damage to the greenhouse.

Strengthening the Greenhouse Structure

Reinforcing the roof and walls

Reinforcing the roof and walls of your greenhouse can enhance its ability to withstand snow load. This can be achieved by strengthening the existing structure or using materials that have higher load-bearing capacities. Consider consulting with a structural engineer to assess the current strength of your greenhouse and identify any necessary reinforcements. Adding additional braces, trusses, or supports to the roof and walls can help distribute the snow load more evenly and reduce the risk of structural failures.

Adding additional support beams

Installing additional support beams can significantly increase the snow load capacity of your greenhouse. These beams can be strategically placed to provide additional strength and stability to critical areas of the structure, such as the roof. It is important to consult with a professional to determine the appropriate size, material, and placement of the support beams to ensure they effectively reinforce the greenhouse without compromising its structural integrity.

Upgrading to a stronger greenhouse frame

If your current greenhouse frame is unable to withstand the expected snow load, it may be necessary to upgrade to a stronger frame. Consider replacing lightweight materials with stronger alternatives, such as heavy-duty aluminum or steel frames. Upgrading the greenhouse frame can provide enhanced load-bearing capabilities and increase the overall resilience of the structure. However, it is important to evaluate the feasibility and cost-effectiveness of upgrading versus building a new greenhouse.

Dealing With Snow Load On Your Greenhouse

Using Snow Guards on the Roof

Understanding the purpose of snow guards

Snow guards are devices installed on the roof to prevent the sudden release of accumulated snow and ice in the form of a snow slide. They are designed to retain the snow on the roof, allowing it to melt gradually and safely. By installing snow guards, you can reduce the risk of sudden and heavy snow slides that can cause significant damage to your greenhouse, structures, or individuals below.

Installing snow guards on the roof

Installing snow guards on the roof requires careful consideration to ensure proper placement and effectiveness. Consult a professional or a structural engineer to determine the optimal positioning and quantity of snow guards for your specific greenhouse design and snow load requirements. Snow guards are typically installed along the edges, ridges, and eaves of the roof, as these areas are particularly susceptible to snow accumulation and subsequent slides.

Choosing the right type of snow guards

Snow guards come in various types and designs to accommodate different roof materials, slopes, and snow load conditions. Some common types include pad-style, fence-style, and pipe-style snow guards. The selection of the right type of snow guards depends on factors such as the roof material, aesthetics, and desired level of snow retention. Consult with a professional to determine the most suitable snow guards for your greenhouse.

Reducing the Impact of Snow Slides

Creating snow breaks or snow fences

Snow breaks or snow fences are physical barriers strategically placed around the perimeter of the greenhouse to interrupt the flow of snow and prevent it from accumulating directly on the structure. These barriers can be constructed using materials such as wooden planks, plastic panels, or metal grids. Snow breaks or fences can help reduce the impact of snow slides and distribute the snow more evenly, minimizing the strain on the greenhouse.

Positioning barriers or trees

Strategically positioning barriers, such as windbreaks or natural features like trees, can help create wind patterns that minimize the accumulation of snow on the greenhouse. These barriers redirect wind and alter airflow, reducing snow deposition and potential snow load on the greenhouse. It is important to consider factors such as wind direction, proximity to the greenhouse, and the growth characteristics of the chosen barriers or trees.

Using melt systems to prevent snow slides

Melt systems are installed on the roof or in the gutters to heat specific areas and facilitate the gradual melting of accumulated snow and ice. These systems can help prevent the formation of snow slides by melting the snow before it reaches a critical accumulation point. Melt systems are particularly effective in areas where snow accumulation is frequent and heavy. Consult with a professional to determine the most suitable melt system for your greenhouse.

Monitoring and Maintenance

Regularly monitoring the greenhouse during snowfall

During snowfall events, it is essential to regularly monitor the greenhouse for any signs of stress or excessive snow accumulation. Pay close attention to any changes in the roof shape, wall stability, or structural integrity. If you notice any concerning signs, take immediate action to address the issue. Monitoring the greenhouse allows for early detection of potential problems and enables timely intervention to prevent snow load-related failures.

Inspecting for signs of stress or damage

Regular inspections should be conducted on the greenhouse structure, both during and after snowfall events. Look for signs of stress, such as sagging roofs, cracking walls, or any visible deformations. Additionally, examine the integrity of the support beams, joints, fasteners, and connections. If there are any indications of stress or damage, consult a professional to assess the severity and recommend appropriate repairs or reinforcements.

Performing routine maintenance to prevent snow load issues

Routine maintenance plays a crucial role in preventing snow load-related issues. Keep the greenhouse and its components clean and free from debris, as accumulated debris can add unnecessary weight to the structure during snowfall. Regularly check and maintain the functioning of roof drainage systems to prevent ice dams and ensure proper water drainage. Furthermore, inspect and repair any damaged or deteriorated parts promptly to maintain the overall structural integrity of the greenhouse.

Emergency Actions and Preparedness

Creating an emergency plan

Having an emergency plan in place is essential to ensure the safety of individuals and minimize potential damages during severe snow load events. The emergency plan should include clear protocols for evacuation, communication, and emergency contacts. Educate all individuals working in or around the greenhouse about the emergency plan and conduct regular drills to ensure everyone understands their roles and responsibilities in the event of a snow load-related emergency.

Having necessary tools and equipment on hand

Being prepared with the right tools and equipment is crucial in responding to snow load emergencies. Keep items such as roof rakes, snow shovels, safety gear, and snow melt products readily available. These tools can help facilitate the safe removal of excess snow or ice from the greenhouse structure. Ensure that all individuals tasked with snow load management are trained in the proper use of the equipment and adhere to safety protocols.

Knowing when to seek professional assistance

While proactive measures can prevent many snow load-related issues, there may be situations where professional assistance is necessary. If you are unsure about the structural integrity of your greenhouse or if you notice significant snow accumulation that exceeds the design snow load capacity, it is crucial to seek professional assistance immediately. Professional structural engineers or snow load experts can assess the situation and provide expert guidance on the appropriate course of action to ensure the safety of the greenhouse and its occupants.

Considerations for Different Greenhouse Types

Polyethylene film greenhouses

Polyethylene film greenhouses are lightweight structures that require careful consideration of snow load management. The film material itself may be vulnerable to tears or punctures caused by excessive snow accumulation. Reinforcing the greenhouse frame, using additional support beams, and installing snow guards are particularly important for these types of greenhouses. Regular inspections and maintenance of the film covering are also essential to ensure its integrity and prevent any compromises in snow load capacity.

Glass greenhouses

Glass greenhouses typically have stronger structural integrity compared to other greenhouse types. However, it is still important to consider the snow load capacity and take preventive measures. Reinforcing the roof and walls, installing snow guards, and regularly inspecting the glass panels for any signs of stress or damage are key. Additionally, ensuring the proper slope of the roof and using melt systems can help prevent snow accumulation and reduce the risk of snow slides.

Polycarbonate greenhouses

Polycarbonate greenhouses offer a balance between strength and insulation properties, making them popular choices for various climates. When dealing with snow load, it is important to select a sufficiently thick and durable polycarbonate material. Additionally, reinforcing the structure, adding support beams, and installing snow guards are recommended preventive measures. Regular inspections, particularly of the polycarbonate panels, are vital to identify any signs of stress, cracking, or damage caused by snow load.


Proactively managing snow load on your greenhouse is essential for ensuring its longevity and the safety of individuals working inside. Understanding the factors that affect snow load, assessing your greenhouse’s capacity, and implementing appropriate preventive measures are all crucial steps in snow load management. Regular monitoring, proper maintenance, and knowing how to respond in emergencies are equally important. By taking these measures, you can safeguard your greenhouse from the potential damages associated with excessive snow load and enjoy the benefits of a safe and productive growing environment.