How to Waterproof a Deck Over Living Space

When it comes to outdoor living, nothing beats the satisfaction of sitting out on a beautiful deck. But sometimes decks can be slippery or hot underfoot and require special care to make them both safe and comfortable for all who use them. If you want your deck to stand up against the elements, you’ll need to waterproof it.

How to Waterproof a Deck Over Living Space

Doing so will help preserve its look and performance through rainstorms, snowfall, direct sunlight, and more. Read on to learn how to waterproof your deck over a living space effectively!

In this blog post, we’ll talk about the various methods for creating a durable cover that is designed specifically for outdoor use; from clear coatings that protect wood surfaces from water damage to pool paints made especially for extended durability in wet conditions – we’ll look at everything there is to know about how to waterproof a deck over living space!

What Will You Need?

Before you get started, you’ll need a few supplies to do the job right. Make sure that you have:

  1. Deck cleaner and stain remover (for prepping the surface)
  2. Waterproof sealant or coating
  3. Painter’s tape
  4. Sandpaper
  5. Paintbrush or roller

Once you have all of the materials you need, it’s time to get started on waterproofing a deck over the living space.

10 Easy Steps on How to Waterproof a Deck Over Living Space

Step 1: Clean and Prepare the Deck Surface

The first step is prepping the surface. Make sure that you clean off any dirt, debris, or loose wood splinters from the area with a good degreaser or deck cleaner. Once you’ve thoroughly cleaned the surface, use sandpaper to rough up any soft spots that are still present.

If there are stains from previous painting efforts, use a specific stain remover for your wood type before continuing to Step 2.

Make Sure That You Clean Off Any Dirt

Step 2: Apply Waterproof Sealant or Coating

Once you’ve prepped the surface, it’s time to apply a waterproof sealant or coating. This will help protect the deck from water damage and provide an extra layer of protection against the elements.

If you previously used a clear sealant on your deck, reapply a fresh coat and ensure all surfaces are thoroughly covered. If you are using paint for waterproofing purposes, choose a pool-grade paint that is designed specifically for outdoor use and follow all instructions carefully.

Step 3: Tape Off Sections You Don’t Want to be Painted

Once you have decided how to waterproof your deck over the living space, take some painter’s tape and secure it around any areas you don’t want to be painted. This will help ensure the waterproof sealant or coating stays only where needed.

Step 4: Use a Roller or Paintbrush

Once you have taped off any sections, use either a roller or paintbrush to apply the waterproof sealant or coating. Start from the highest point of your deck and work down, making sure to cover all surfaces evenly with each stroke.

When you finish one section, allow time for it to dry before moving on to another. Ensure you add additional coats if necessary after each coat has dried thoroughly.

Step 5: Allow Proper Drying Time Upon Completion

The final step is to allow ample time for your sealant or coating to dry. Depending on how much you apply and the temperature of the atmosphere, this can take anywhere from 4-12 hours.

Step 6: Test and Monitor The Deck

To ensure waterproofing a deck over a living space is effective, test how well your work is held up by spraying water onto different sections of the deck and waiting for it to soak in. If you see any signs of moisture seeping through after a few minutes, apply another coat of sealant or paint.

Apply Another Coat of Sealant or Paint

Step 7: Maintenance and Care

After waterproofing a deck over the living space is complete, you’ll need to make sure that you do regular maintenance in order to keep it looking great. Make sure you clean the surface regularly with a mild cleaner and reapply sealant or paint as necessary.

Step 8: Look for Signs of Wear and Damage

Inspecting your deck periodically for signs of wear and damage is also important. If you find any areas where the waterproofing has failed, take the necessary steps to correct the issue before continuing to waterproof a deck over the living space. Don’t be afraid to call in a professional if you need help.

Step 9: Add Decorative Features

Once waterproofing a deck over the living space is complete, it’s time to add some decorative features. Consider adding furniture and plants to create an inviting atmosphere or even adding lighting fixtures for nighttime ambiance. You can also use stencils to create interesting patterns on the surface of your deck.

Step 10: Enjoy Your Deck!

Finally, make sure that you enjoy your newly waterproofed deck! Whether it’s gathering with friends or simply relaxing alone, now that waterproofing a deck over the living space is done, there are endless possibilities for how you can use the outdoor space. Have fun, and stay safe!

By following these steps on waterproofing a deck over living space, you can ensure that your deck is safe and protected from the elements for many years to come. With proper maintenance and care, your deck will remain beautiful and functional for a long time. Have fun!

Ensure That Your Deck is Safe and Protected

5 Additional Tips and Tricks

  1. Invest in water resistant materials, such as treated wood or composite decking.
  2. Check for any visible gaps between the deck and your home’s exterior walls where water may collect. Caulk these gaps to prevent water from seeping in.
  3. Install a weatherproof barrier underneath the deck boards to protect the area below them from getting wet.
  4. Add an umbrella or overhang above the deck to provide some protection from rain and snowfall when you are not using it.
  5. Make sure that all your waterproofing solutions are properly maintained and kept up-to-date to remain effective over time. Consider periodic inspections to identify any potential issues early on before they become serious problems later down the road.

Taking the time to waterproof your deck properly can save you from expensive damages in the future.

5 Things You Should Avoid

  1. Do not use a sealant or other water-proofing agent that contains organic solvents. Organic solvents can damage wood, PVC, and other deck materials.
  2. Do not rely on inadequate drainage systems, such as horizontal sloping of the deck surface, to get rid of excess water. This system does not move the water away fast enough and will pool water underneath the deck.
  3. Do not neglect to inspect your roofing material prior to installation. Before attaching it to the deck frame, the roof should be examined for any signs of deterioration and leaks.
  4. Do not use regular plywood for the deck floor regardless of how waterproofed it is treated; use marine grade plywood instead, as its layers are laminated together with waterproof glue.
  5. Do not put off waterproofing a deck over the living space for too long; this project should be done as soon as possible in order to protect the underlying material from water damage.

By following these tips, you can ensure waterproofing a deck over the living space is done correctly and keeps your family safe and dry! Additionally, it will keep your deck looking great and functioning properly for years to come.

Which is the Cheapest Waterproofing Method?

The cheapest method for waterproofing a deck over a living space is using a sealant or waterproofing agent. These products are readily available and relatively easy to apply, making them an inexpensive yet effective way of protecting your outdoor surfaces from the elements.

Using a Sealant or Waterproofing Agent

However, it’s important to remember that not all waterproofing solutions are created equal; some will last longer than others, so be sure to do your research and find the one that best suits your needs and budget.

Additionally, you should always check with local building codes before beginning waterproof a deck over the living space in order to ensure you’re following all regulations.

By keeping these tips in mind when waterproofing a deck over a living space, you can keep the area looking great and secure for years to come. Have fun!


In conclusion, waterproofing a deck over a living space is essential for homeowners looking to extend their outdoor living space. Keeping moisture out is important in any exterior remodel project; properly waterproofing will make all the difference.

With proper planning, preparation, and materials, keeping your living space free from water damage is not difficult. It’s also wise to invest in some sort of maintenance plan for your deck going forward in order to keep it in tip-top shape and properly sealed against moisture year after year. Homeowners can rest easy with the knowledge that their investment in waterproofing is one that pays for itself many times over!

Hopefully, this article has helped you to understand how to waterproof a deck over living space. When done correctly, it can be a great way to extend your outdoor living area and enjoy the outdoors with family and friends for years to come! Good luck!

Photo of author

Adrian Green

Adrian has been interested in woodworking since he was a child. His father had a woodworking shop, and Adrian would help him out and learn from him. He gained basic carpentry knowledge as well as an understanding of how to work hard and take care of business. He enjoys woodworking as a hobby. He loves the feeling of creating something with his own hands, and the satisfaction that comes from seeing his finished products used by others. So he started this blog to spread his passion and knowledge to those interested in DIY wood-working projects. He knows that with a little guidance and practice, anyone can create beautiful pieces of furniture or décor from scratch.

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