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Snow Load Capacity: How Much Snow Can Your Roof Hold?

Posted on December 5, 2023

Snow Load Capacity: How Much Snow Can Your Roof Hold?

The snow load capacity of a roof is the maximum amount of snow it can support without collapsing. The snow load capacity is determined by the slope of the roof, the type of roofing material, and the weight of the snow. To understand the snow load capacity of your roof, you can consult with a roofing contractor or engineer. They will be able to assess the specific conditions of your roof and recommend a snow load capacity based on your home. 

In this guide, we will go over these factors in more detail and provide you with everything you need to know about your roof’s snow load capacity. 

How Your Roof Design Impacts Its Snow Load Capacity

The design of a roof is critical in determining how well it will be able to support the weight of snow. There are a number of factors that need to be considered when designing a roof in snowy areas, including the slope of the roof, the type of roofing material used, and the weight of the expected snow.

Roofs with a steeper slope are more resistant to snow accumulation than roofs with a shallower slope. This is because snow slides off of a steep roof more easily than it does off of a flatter roof. The type of roofing material used also plays a role in how well a roof can support snow load. For example, shingles are a lightweight roofing material, so they can support a lower snow load compared to heavier materials such as slate or tile.

The weight of the snow expected in the area is also a major factor in determining how a roof should be designed for snow load. In areas with heavy snowfall, roofs will need to be built to withstand a greater weight than roofs in areas with light snowfall.

Best Roof Construction Features for Heavy Snow Loads

The construction of a roof has a significant impact on its ability to support the weight of snow. Here are some specific construction features that can help to improve a roof’s snow load capacity:

  • Steeper Slopes: Roofs with slopes of 45 degrees or more are more resistant to snow accumulation than roofs with flatter slopes.
  • Heavy Materials: Roofs that are made from heavy materials, such as concrete tiles or slate, are more likely to withstand the weight of snow than roofs that are made from lighter materials, such as asphalt shingles.
  • Overhangs: Roof overhangs can help to protect the eaves from snow accumulation.
  • Ridge Vents: Ridge vents can help to prevent snow from building up on the roof by allowing warm air to escape from the attic.

By considering all of these factors, it is possible to design a roof that will be able to support the weight of snow without collapsing.

The Best Roofing Materials for Heavy Snow Loads

The type of roofing material used on a roof can have a significant impact on its ability to support the weight of snow. Some roofing materials are more resistant to snow accumulation and shedding than others. For example, roofing materials that have a smooth surface, like metal roofs, are less likely to accumulate snow. In areas with heavy snowfall, it is important to choose a roofing material that is specifically designed for the climate.

Some of the most common roofing materials used for snowy areas include:

  • Metal
  • Concrete
  • Tile
  • Slate

These materials are all strong and durable, and they can withstand the weight of heavy snow without sustaining damage.

The Importance of Snow Removal

Snow removal is essential to prevent roof damage caused by snow accumulation. The weight of snow can cause roofs to sag, leak, or even collapse. It is important to remove snow from roofs as soon as possible, especially after severe storms.

There are a few different ways to remove snow from roofs. One common method is to use a roof rake. Roof rakes are long, extendable poles with a flat blade at the end. They can be used to remove snow off of roofs in a controlled manner.

It is important to take precautions when removing snow from roofs. Always wear a hard hat, safety glasses, and sturdy shoes. Be aware of the weight of the snow and do not stand directly below the edge of the roof.

If you are unable to remove snow from your roof yourself, you can hire a professional roofer to do the job. Roofers are trained and experienced in removing snow from roofs safely and efficiently.

How to Prevent Damage Caused by Heavy Snow Loads

A heavy snowfall can cause roofs to collapse, which can lead to serious injuries or even death. In addition, snow can also damage gutters, siding, and other parts of a home or building.

There are a number of things that can be done to prevent damage and injury caused by heavy snow loads. These include:

  • Installing a roof with adequate snow load capacity for your area
  • Keeping gutters clear of snow and ice
  • Removing snow from the roof regularly
  • Using snow guards to prevent snow from sliding off the roof

By following these tips, you can help to keep your home or business safe from damage caused by heavy snow loads. 

Snow Load Laws and Regulations

Snow load laws and regulations are designed to protect homeowners from the dangers of snow-related roof collapses. By ensuring that roofs are able to support the weight of snow, these laws help to prevent injuries and property damage.


Snow load laws and regulations vary from state to state, but they typically require that roofs be able to support a certain amount of snow weight. The amount of snow weight that a roof must be able to support is based on the location of the building and the type of roof construction.

In some cases, homeowners may be required to have their roofs inspected by a qualified professional to ensure that they are in compliance with local snow load laws and regulations.

Does Insurance Cover Damage Caused by Snow? 

If your roof is not able to support the weight of the snow, it can collapse, causing damage to your home and belongings. But, most insurance policies can help cover the cost of repairs to your roof and your home.

Coverage for snow-related damage is typically offered by homeowners insurance companies. However, not all policies include snow load coverage, so it’s important to check your policy to see if you are covered.

If you live in an area that is prone to heavy snowfall, it is a good idea to have this insurance coverage, as it can help to protect you from the financial burden of repairing your home if your roof collapses due to snow.

When to Call Snow Load Consultants

Snow load consultants are professionals who can help home and business owners assess the snow load capacity of their roofs. They can also provide advice on how to prepare the property for winter weather and how to remove snow from a roof safely.

Snow load consultants typically have a background in engineering or construction. They are familiar with the different factors that affect snow load, such as the weight of snow, the slope of the roof, and the type of roofing materials.

Snow load consultants can help homeowners and businesses to:

  • Determine the snow load capacity of their roofs
  • Design roofs that can withstand the weight of snow
  • Install snow guards to prevent snow from sliding off roofs
  • Remove snow from roofs safely

If you are concerned about the snow load capacity of your roof, it is a good idea to talk with a snow load consultant. They can help you to make sure that your roof is ready for the winter months.

Winter Roofing Services

If you live in the northern and midwest US, you know that snow is a fact of life. But did you know that not all roofs are created equal when it comes to handling snow loads? Some roofs are simply not designed to withstand the weight of heavy snowfall, and this can lead to serious problems. 

At ReNew Roofing, we understand the importance of having a roof that can support the weight of snow. That’s why we offer a variety of roofing systems that are made with high quality materials and are designed to withstand even the heaviest snowfalls. They’re also installed by our experienced team of roofers, who know how to properly install all types of roofs, from metal panels to concrete tiles. 

If you’re concerned about whether or not your roof can support the weight of snow, don’t hesitate to contact ReNew Roofing. We’ll be happy to assess your roof and recommend a roofing system that’s right for you. Call us today at (586) 690-0227 for a free consultation. 

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