A deck is a beautiful addition to any home, providing an outdoor living space for family gatherings, barbecues, and relaxation. However, with the constant exposure to the elements, your deck can be vulnerable to water damage. Water can seep into the wood, causing rot, decay, and even structural damage. That’s why it’s essential to waterproof your deck to ensure its longevity and to protect your investment.

In this blog, we will explore different methods for waterproofing your deck, from traditional techniques to the latest innovations in deck waterproofing technology.


One of the most traditional methods for waterproofing a deck is through the use of sealers. There are a variety of deck sealers available, including oil-based and water-based options. Oil-based sealers penetrate deep into the wood, providing a long-lasting barrier against water damage.

Water-based sealers, on the other hand, sit on top of the wood, providing a barrier against water damage. Both options have their pros and cons, and it’s essential to choose the right sealer for your decking material and your specific needs.

It’s important to note that sealers will need to be reapplied periodically, typically once a year, to maintain their effectiveness.


deck membranes

Another popular method for waterproofing a deck is through the use of membranes. Deck membranes are thin, waterproof layers that are applied to the surface of the deck. These membranes are designed to prevent water from penetrating the wood, keeping the deck dry and protected.

Deck membranes are available in a variety of materials, including rubber, PVC, and TPO. Each material has its own unique properties, and it’s essential to choose the right membrane for your decking material and your specific needs.

Membranes are also a great option if you are looking for a low-maintenance waterproofing solution, as they do not require regular reapplication.

Under-Deck Drainage Systems

under deck patio

Under-deck drainage systems are a hidden gem for any homeowner looking to maximize the functionality and beauty of their outdoor space. Imagine the sound of raindrops tapping against the roof of your own personal oasis, hidden away beneath the deck. The gentle pitter-patter creates a serene ambiance as you relax in your private retreat, protected from the elements. Not only do these systems provide a unique and cozy atmosphere, but they also serve a practical purpose. They allow any water that may seep through the deck to be channeled away, preventing water damage and ensuring the longevity of your deck.

A Variety of Styles

These systems come in a variety of designs and styles, each with their own unique features. Some systems use a network of channels and pipes to divert water, while others use a system of gutters and downspouts. Some under-deck drainage systems even feature a built-in lighting system, creating a beautiful and inviting space that can be enjoyed day or night.


The installation of under-deck drainage systems can be done during the construction of a new deck or as a retrofit for an existing deck. It’s a smart and cost-effective way to add value and functionality to your outdoor living space. Not only will it protect your deck from water damage, but it will also create a unique and inviting space that can be enjoyed year-round.

Invest in an Under-Deck Drainage System

So, if you’re looking to add a touch of elegance and practicality to your outdoor space, consider an under-deck drainage system. It will be the best decision you’ll ever make for your deck. Not only will it increase the longevity and durability of your deck, but it will also create a unique and inviting outdoor space that can be enjoyed year-round, rain or shine.

Investing in an under-deck drainage system is a smart and cost-effective way to enhance the functionality and beauty of your outdoor living space, making it a valuable addition to your home.

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Also referred to as under-deck roofs, we have even more information on them to aid in your search for the perfect project.

Liquid Applied Membranes

liquid applied membranes

A newer and exciting innovation in deck waterproofing technology is the use of liquid applied membranes. These membranes are applied as a liquid and then cure to form a waterproof barrier. They are ideal for waterproofing decks as they can be applied to irregular surfaces and can also be used to repair existing decks. They are versatile and can be used on a variety of surfaces such as concrete, wood and metal. Once applied, they provide a long-lasting and effective waterproofing solution, and they require little to no maintenance.

Ensuring Long-Term Waterproofing

under-deck waterproofing

To ensure that your deck remains waterproof over time, it is important to properly maintain and care for it. One of the key steps is to regularly clean the deck using a mild detergent and water. This will remove any dirt and debris that can accumulate on the surface, which can cause mold and mildew to grow.

Additionally, it is important to seal the deck at least once a year to protect it from water damage. Make sure to use a high-quality deck sealant that is specifically designed for use on composite decking.

Another good practice is to check for any signs of water damage on a regular basis, such as warping or discoloration, and address them as soon as possible to prevent the problem from getting worse. Keep in mind that proper drainage is also important, to avoid water pooling up in low areas.

Be sure to keep any plants or landscaping well-trimmed, so they don’t touch or overhang the deck. This will prevent moisture from seeping into the wood. Check out our low-maintenance decking blog for more insight on extending the life of your deck.

Are Your Openings Sealed?

Another important step in keeping your deck waterproof is to make sure that all openings, such as gaps between boards, are sealed. This will prevent water from seeping into the wood, which can lead to rot and decay. Additionally, be sure to check the flashing around the deck, such as the flashing around the base of the deck, to ensure it is secure and in good condition.

The Verdict?

rainguard decking waterproofing

In conclusion, waterproofing your deck is essential to ensure its longevity and to protect your investment. There are a variety of methods for waterproofing a deck, including traditional techniques such as sealers and membranes and newer innovations such as liquid applied membranes. Each method has its own unique properties, and it’s essential to choose the right method for your decking material and your specific needs.

Additionally, taking steps to keep your deck clean and free of debris, and ensuring all openings are sealed, can help to prevent water damage and prolong the life of your deck. Regular maintenance and inspection of the deck, flashing and any other areas that may be prone to water infiltration are crucial to keep your deck in optimal condition.

Furthermore, if you are looking to install a new deck, it is recommended to consider waterproofing options during the construction process, this will save you time and money in the long run. With the right approach and care, you can enjoy your beautiful deck for many years to come, without worrying about water damage.

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If you’re ready to get started right now, give Ace of Decks a call! We are here to assist you in planning, designing, and carrying out your ideas.

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