How Do You Build a Deck Over an Existing Roof?

A deck built on top of an existing roof might be a lovely addition to your home. The challenge is that it will require some form of supporting structure, as well as waterproofing and any penetrations. We’ll go through how to build a deck over an existing roof in this guide. Because installing a deck on top of an existing roof might be difficult, it’s important to do your homework before getting started. As a result, we will go over a few key points.

Things to Consider

Professional Inspection Needed
So, if you’re considering installing a roof deck on an old flat roof, be sure it’s been professionally assessed before you start. The roof you intend to build a deck on must be capable of supporting 55 pounds per square foot of weight. It’s usually preferable to consult an engineer if you’re unsure.

• Verify Existing Roof Integrity
  Consider how you intend to finish off your flat roof, including water run-off, deck access for maintenance, drainage, and so on. Flat roofs leak regardless of whether they are decked or not due to design flaws, insufficient materials, and bad installation. When installed, many roof decks exacerbate roof damage, resulting in even more severe leaks and drainage issues.

• Waterproofing
  Flashing the deck supports and rail penetrations, as well as adding an EPDM membrane, are all part of deck waterproofing. This is generally accomplished by slipping EPDM rubber boots over the openings. EPDM is a rubber-like material that is used to make surfaces watertight. Because poor drainage can lead to leaks, the roof must slope at a quarter of an inch every 12 inches to shed water.

• Allow Future Access
  Deck panels should be constructed in such a way that they can be easily lifted for cleaning and repairing the membrane beneath them. To put it another way, you must be able to easily access the membrane underneath for any necessary maintenance or repair.
• The roof below should be cleaned and inspected regularly for debris such as leaves. A deck on a roof under pine trees, on the other hand, will require significantly more maintenance to keep debris from accumulating over time than a rooftop deck on top of a high-rise.

How To Build A Deck Over An Existing Roof

A professional builder would typically do this by erecting two columns – one at each end – beneath the new deck and laying beams across the top. If you’re doing this on your own, you’ll need to figure out how to support these columns with post-tension cables or pier blocks.

Then you will need a platform made of right-angled planks that can support the weight of your deck, as well as enough space between each board for water to run off and a layer of insulation.

To avoid water infiltration, a water-tight EPDM rubber membrane should be put on top of the roof deck. Before dealing with the decking, make sure you’ve installed “sleepers,” or flat 2x6s laid flat on the roof. This will provide you a flat platform on which to install the decking.

Final Words

Adding a deck to your existing roof expands your living area and provides a great place for family get-togethers and barbecues. It not only boosts the value of your property but also expands your outdoor living space, allowing you to enjoy your deck for three to four seasons, depending on where you live. A roofed deck allows you to enjoy an outdoor lifestyle away from the elements when the sun is blazing down relentlessly or the rain is driving you in from the yard.

FAQs

Are you still interested in building a roof over your deck?

Yes, I would be happy to provide information on building a roof over your deck. Building a roof over your deck can provide protection from the sun and rain, allowing you to enjoy the space with your friends and family all year round. If you are still interested in this project, I recommend reaching out to a local roofing expert who can assist you. They will guide you through the entire process, from discussing different styles and designs to providing cost estimates. To find qualified roofers near you and to learn more about the roofing services they offer, please give us a call at 651-703-2336. We look forward to helping you create the perfect roof for your deck.

Does a deck add value to a house?

A deck can significantly contribute to the value of a house in multiple ways. While financial gains are often a primary consideration, homeowners often choose to install decks for reasons beyond just monetary returns. Aside from increasing the resale value of the property, decks enhance the overall livability of homes, creating a sense of joy and improving the overall experience of living in the house. Despite the initial costs associated with deck installation, the long-term benefits make it a worthwhile investment for homeowners.

Should I cover my deck in the winter?

When considering whether or not to cover your deck during the winter, it is highly recommended to provide some form of protection to safeguard it from the harsh winter weather. This can be achieved through options such as a permanent roof or a temporary tarp. However, it is worth considering the long-term benefits of investing in a roof. Constructing a roof over an existing deck may seem like a daunting task, but fret not, as there are local roofing experts who can offer advice or even complete the project for you. By covering your deck during the winter season, you ensure its longevity and shield it from potential damage caused by snow, ice, and chilly temperatures.

Should I cover my deck?

It’s a good idea to have a covering for your deck, whether that covering is a roof or a tarp. Many homeowners prefer a permanent roof because not only will it protect you, your family, and your deck from the elements, but it also improves your home’s curb appeal and resale value.

What is the best option for roof decking?

When it comes to choosing the best material for roof decking, there are two common options: OSB (Oriented Strand Board) and plywood. While OSB is typically less expensive than plywood, it does have some drawbacks, such as a higher susceptibility to trapping and storing moisture. On the other hand, plywood generally offers better quality but comes at a higher cost. When deciding which material to choose, it’s important to consider your priorities. If budget is a significant factor, OSB may be a more appealing option as it is more affordable.

However, it’s crucial to keep in mind that OSB’s tendency to trap and retain moisture can lead to potential issues in the long run, such as rot and decay. Plywood, although more expensive, is often considered a higher-quality choice for roof decking. It tends to have better moisture resistance, making it less prone to structural damage caused by moisture accumulation over time. The greater durability offered by plywood may result in longer-lasting and more reliable roofing. Ultimately, the decision between OSB and plywood for roof decking will largely depend on your willingness to invest in higher quality and potentially pay a higher price. It is recommended to consult with roofing professionals or contractors who can assess your specific needs and provide guidance on the best option for your roof.

What can I use to cover my deck?

When considering options to cover your deck, there are several choices available to you. You can explore different types of roofs that can be built over your deck, such as gable roofs, hip roofs, or shed roofs. Each has its own unique design and characteristics, offering different aesthetic and functional benefits. Once you have decided on the type of roof that suits your preferences and needs, the next step is to choose the material. There is a wide range of materials that can be used to cover your deck, each with its own advantages and considerations.

Some popular options include asphalt shingles, metal roofing, slate tiles, or even thatch for a more unique and tropical feel. To ensure you make the best decisions for your deck covering project, we recommend reaching out to your local roofing company that specializes in building roof decks. They can provide expert advice and guidance, helping you navigate through the various options available. By scheduling a consultation with them, you can discuss your requirements and receive personalized recommendations based on your specific deck and desired outcome. Remember, choosing the appropriate cover for your deck not only adds protection but can also enhance the overall aesthetic appeal and value of your outdoor space.