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  • Barry Lenson

Fourteen Critical Factors to Consider Before Installing a Pergola on Your Roof

Have you thought about installing a pergola on the roof of your home, apartment building or commercial enterprise?


First of all, you can only install a pergola if you have a flat roof. But if you do, take a moment now to think about installing a pergola. It can be a great idea, because a rooftop pergola can serve many functions you might not have thought about before . . .

  • A charming outdoor dining room for your restaurant in summer.

  • An additional outdoor space on your home or atop your apartment building.

  • A shady protective structure over a rooftop hot tub or exercise area.

After reading about those possibilities, are you starting to imagine how your rooftop pergola will look, and how it will function? But here are 14 critical considerations to think about before planning or constructing your new pergola “up in the sky” . . .


1: Local Building Codes and Regulations


Check with your local building department to determine if there are any specific regulations or permits required for installing a pergola on a roof. Building codes can vary from place to place, and compliance is essential. Also speak with your local fire department – you want to be sure that patrons or guests who are using your pergola will be able to safely exit your roof in the advent of a fire.


2: Load-Bearing Capacity


Have a structural engineer assess the roof's load-bearing capacity to ensure it can support the additional weight of the pergola, especially if it will be covered with plants, fabric, or other materials. The roof structure may need to be reinforced.


3: Your Roof’s Surface


Flat roofs are typically covered with roll-out asphalt roofing, but take a closer look and plan accordingly. One option is to construct a wooden deck that sits atop your roof; this approach distributes the weight of your pergola and eliminates the necessity of drilling or cutting into your roof’s water-inhibiting surface.


4: Logistics


This is another way of saying, “How am I going to get the materials I need to build the pergola to the roof?” Obviously, this can’t be an afterthought. Can you reasonably expect to use your building’s elevator to deliver the lumber and other supplies to your roof? Can those materials be hoisted onto the roof using a winch or rope? Or will you need to use a small crane? Note that logistical issues like those can influence whether your pergola will be constructed from wood, masonry, or some other material.


5: Drainage


Assess how the pergola will affect the natural drainage of rainwater from your roof, using systems that are already in place. Ensure that the installation does not create water pooling issues or negatively impact your roof's drainage.


6: Selection of Materials


Choose suitable materials for the pergola, considering factors like weight, weather resistance, durability, and aesthetics. Common materials include wood, metal, masonry or even vinyl if weight is a consideration. And be sure to select materials that can withstand outdoor conditions in your location.


7: Design and Placement


Plan the size, shape, and design of the pergola to complement your building’s architecture. Determine the best location on the roof to maximize shade and views. Consider accessibility by asking “How will people get to the pergola, how will they leave?”


8: Access to Electricity and Water and Gas


Chances are that you will want lights in your pergola. Whether you want water or natural gas for cooking is another consideration. Have a licensed electrician, plumber and other professionals look at the proposed location of your pergola and help you plan.


9: Safety


Ensure safe and convenient access to the pergola from your roof or other parts of your home or building. Consider railings or safety features, especially if you have children or pets. Covering the floor or surrounding areas with slip-resistant coatings can be a good idea.


10: Wind Resistance


Account for wind loads in your area when designing the pergola. It should be sturdy and anchored securely to withstand strong winds.


11: Insurance


Confirm with your insurance provider how the installation will affect your homeowner's insurance.


12: Shade and Covering Options


Decide whether you want a fully covered or partially covered pergola. Options include retractable awnings, shade cloth, or natural elements like vines or plants. Consider how these coverings will affect the pergola's weight and maintenance.


13: The Cost of Professional Installation


It's advisable to hire experienced contractors or builders with expertise in roofing and pergola construction. They can ensure proper installation and safety.


14: Budget


Determine your budget for the project, including materials, labor, and any additional features or accessories.


By carefully considering these details and working with professionals, when necessary, you can create a functional and aesthetically pleasing pergola on your roof that enhances your outdoor living or commercial space.


For Help in Making the Right Choice


If you’re hoping to have a beautiful pergola that you can enjoy for years and years, be sure to visit Privlux, the leading designer and provider of high-quality pergolas for your yard, business, rooftop . . . anywhere! While you are visiting, be sure to fill out the online form and get a free quote on the pergola of your dreams.


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