Your message has been sent
    and our manager will contact you shortly.


    Home | Our Blog | Building Deck Over Garage Roof

    Building Deck Over Garage Roof

    Reviewed by Tomas Kalkys. President.
    Qualifications: More than 20 years of experience in residential and commercial exterior remodeling.
    Founding farther of Legacy Service.
    Written by LegacyUSA Team

    posted on Oct 24, 2019

    Get Estimates From Roofing Pros

    There are plenty of ways to enhance your home and increase its curb appeal. Building a deck over your garage’s roof is one of them. This type of project may be complicated to complete, but you’ll find that it’s worth it in the long run. After all, who doesn’t want another way to enjoy the great outdoors from the comfort of their own home?

    A newer, custom built, a-frame contemporary style house.

    At Legacy Service, we can help you with your home exterior projects, from roofing to siding and more. If you’re looking into ways to build a deck over your garage roof, look no further than our team of roofers. We’ll help you decide exactly what you want for your home, and we’ll get it built for you, so you can spend better quality time with your loved ones.

    Looking for home improvement company?
    Find out how much your project will cost

    Not a real zip code.

    Can You Build a Deck Over a Garage Roof?

    Yes! If your garage has a flat roof, or if you’re planning to build a garage that’s next to your home but below the level of the main floor, it’s entirely possible to build a deck on your garage roof. What’s even better is the fact that building a deck over the roof could save you money as opposed to building one that’s separate from the garage. You can also save tons of space, especially if the space on your property is limited or you have a small yard.

    However, there’s no denying that building a deck over your flat roof garage is a complicated process. If you’re not experienced in residential construction, it’ll be very difficult to complete without help from experts. Your roof might even end up leaking if something is not done correctly. That’s where we come in at Legacy Service. If it has been your lifelong dream to have a deck built over your garage, we’ll make you make it a reality. All we want to help you build your dream home, so you can enjoy yourself with your family and friends.

    Reasons to Build One

    Even with a contractor, building a deck over your garage roof can be a difficult, time-consuming, and expensive project. We recommend it only to the people who truly want one for their home.

    With that being said, there are certain reasons to build one. First of all, as we stated above, if you’re dealing with limited space but want somewhere to sit outside and relax, a deck over your garage would be the perfect addition. You won’t have to take up any precious yard space, and you’ll feel like royalty looking out over your kingdom when you step outside. Also, if you’re looking to have gatherings and get-togethers with your nearest and dearest, a new deck is a great way to get everyone to hang out outside. And even though it can get expensive, building a deck over your garage rather than adjacent to your home can also help you save money.

    Large long balcony home exterior with table and chairs, lake view.

    What to Keep in Mind

    If you’re still interested in building one for your home, you’ll have to keep certain things in mind, including how drainage and runoff will work, how you can make sure the deck is properly supported, what you can do about railings, and how you can access the deck.

    Drainage and Runoff

    You’re probably wondering how a flat surface like a deck will allow water to drain and runoff when it rains or snows. The good news is that all roofs are sloped, even when they’re flat roofs. They’re all designed at an angle that will allow rain and melting snow to slide off. If you’d like to build a deck over your roof, make sure the roof has a covering that allows water to run off. You’ll most likely be able to build the deck on that. Even if your roof has a slight pitch, you can level it off through the construction of the deck’s understructure.


    This is obvious, but building a deck on your roof will add plenty of extra weight. Make sure your garage has enough support to hold the weight by checking with a contractor, building inspector, or architect. You might have to make modifications to the garage to be able to support the deck. If you don’t yet have a garage and were planning to build one along with the deck, you’ll have to include the extra weight of the deck with the garage’s construction plans. With the right planning for support, you’re well on the way to building your deck.


    Whether you have children or not, you’ll need railings installed for safety purposes along the outside edges on a rooftop deck. Plan ahead to ensure the height of the railings are adequate since the decking will be higher than the actual rooftop. Attach the railings to the structure of the deck rather than the edge of the roof, and pay extra attention to the areas where the edge of the deck meets an exterior wall. Make sure you’re keeping the siding intact without leaving any dangerous gaps next to the wall.


    Fortunately, access will be pretty easy if your garage is attached to your home and your house already has more than one level. All you’ll need to do is walk out a door on the side of your house to get onto the deck. It’s ideal if the garage is next to a common area like the living room or kitchen. If it isn’t accessible from the second level of your home, or it ends up being next to someone’s bedroom, you can always add stairs leading up from the ground to the deck.

    Find the qualified home improvement company

    Not a real zip code.

    Deck Over Roof Designs

    Once you decide to build a deck over your garage’s roof and determine the best and safest ways to do so, it’s time to choose a design that you and your family will be happy with. Our project consultants can help you find the design that matches your style preferences and tastes, but you may even want to do your own research beforehand to at least get a basic idea of what you want. Here’s what to consider:

    • Covering – No deck is complete without some shade from the sun and protection from the rain. Fortunately, there are several good options to choose from for your garage roof deck. One of them is a patio umbrella, which is lightweight and can be removed during the winter. Another one is a retractable awning, which is attached to your house and can be a great option if the layout of your home allows it. If you’d prefer a roof or pergola, make sure your home will be able to support the extra weight.
    • Flooring – How do you want your deck’s flooring to look and feel? One of the most popular options is wooden flooring, especially sustainably sourced wood that’s a good option for the environment. Other options may include interlocking tiles, flagstone rubber pavers, paver tiles, slate tiles, and more.

    Ready for Your New Deck?

    If you have the right type of home for this project and you’re willing to spend the money, it’s time to get started on building your new deck! Whatever you do, make sure you hire professionals, like Legacy Service, who know what they’re doing, so your deck can bring you rest and relaxation for years to come.

    Our team at Legacy Service has the experience and expertise you need for this job. We handle all types of home exterior design, installation, and replacement services, and we’re always ready to help a homeowner achieve the dream house they’ve been yearning for. Rooftop decks require careful preparation, thoughtful design, and expert construction services. Once it’s done (and done correctly), you might even be wondering how you used to live without one. To schedule a roof replacement consultation, give us a call at 215-798-9790 or contact us at

    Find reliable home improvement company near you

    Posted on Oct 24, 2019 in Roof

    Read our news


    A lot of elements play a role in maintaining the integrity of the roof, but as a homeowner, the most important components to pay attention to are the underlayment, ventilation, and material.


    Choosing the best roofing material for your home is the first important step in ensuring that you have the highest quality roof possible.


    Two of the most popular roofing materials on the market are metal and asphalt, and both offer different pros and cons to a customer.

    Pros and cons of Asphalt Shingle Roofing

    Replacing a roof is an expensive decision, and cannot only come down to cost.