Everything You Need To Know About Deck Drainage Systems

Picture this: a beautifully designed deck where you can relax, entertain guests, or simply bask in the beauty of nature. Now imagine that the deck is always dry, no matter the weather, providing a comfortable and inviting space for you to enjoy.

In this comprehensive guide, we will delve into the crucial topic of deck drainage and how it can transform your deck from a mere wooden platform into a functional extension of your home. 

We will explore the importance of proper deck drainage, its impact on the longevity and aesthetics of your deck, and the potential risks it poses to your home’s foundation and surrounding landscape.

deck on autum deck drainage system

Key Takeaways

Understanding the Need for Deck Drainage

By prioritizing deck drainage, you can protect your investment, preserve the lifespan and aesthetics of your deck, and safeguard your home’s foundation and landscape.
deck water damage

Water Damage

Water can seep into the structure without proper deck drainage, causing significant damage over time. This includes warping, splitting, and rotting of the deck boards, compromising their structural integrity. Wood rot can complete damage the integrity of the deck.

Mold and Mildew

Excessive moisture buildup on the deck can lead to mold and mildew, making your deck unsightly and posing health risks to you and your family.

Stains and Discoloration

Water pooling on the deck can leave unsightly stains and discoloration on the surface, diminishing its visual appeal and making it more challenging to maintain.

Longer Lifespan

Adequate deck drainage helps prolong the lifespan of your deck by preventing moisture-related issues that can weaken the structure and require costly repairs or replacement.

Enhanced Beauty

By keeping water from accumulating, proper deck drainage maintains the pristine condition of your deck, preserving its beauty and allowing you to fully enjoy its aesthetics.

Foundation Issues

Improper deck drainage can lead to water pooling around the base of your home, potentially compromising the foundation. This can result in costly foundation repairs and structural instability.

Soil Erosion

Excess water runoff from a poorly drained deck can erode the soil around your home, affecting the landscape’s stability and potentially damaging plants, flowers, and trees.

Pest Infestation

Standing water attracts pests, such as mosquitoes and termites, which can not only be a nuisance but also cause damage to your deck and surrounding areas.

Under-Deck Drainage Systems

Imagine enjoying your outdoor space even during a rain shower. Under-deck drainage systems make this possible by creating a dry area beneath your deck.

These systems typically consist of troughs, gutters, and downspouts installed beneath the deck joists in the under-deck area to collect and redirect water away from the deck’s surface.

Under-deck drainage systems allow you to utilize the space beneath your deck, providing a protected area for storage, outdoor gatherings, or even a cozy outdoor living space.

Here at Deck Bros, we offer professional and reliable deck building installation for homeowners in Omaha, NE, and surrounding areas. We take everything into consideration, including the weather here, your needs, and your preferences!

Waterproof Deck Membranes

Waterproof deck membranes are an excellent option if you desire a completely waterproof deck surface that prevents water from seeping through to the underlying structure.

These membranes are installed directly on top of the deck’s surface, forming a barrier against water penetration. They are available in various materials, such as vinyl, rubber, or specialized coatings.

Waterproof deck membranes offer excellent protection against water damage, ensuring a dry and durable deck surface. They also come in a range of colors and finishes, allowing you to maintain the aesthetics of your deck.

water on deck

Deck Sloping and Water Runoff Techniques

If you prefer a more straightforward approach to deck drainage, deck sloping and water runoff techniques might be suitable for your deck.

This method involves designing the deck surface with a slight slope to direct water towards designated drainage points, such as downspouts or built-in scuppers.

Deck sloping and water runoff techniques are cost-effective and can be incorporated during the deck construction process. It’s a simple yet effective way to prevent water accumulation and ensure proper drainage.

deck on autum deck drainage

Choosing the Right System for Your Deck

Each deck drainage system has its benefits and suitability for different scenarios. Consider the following factors when selecting the best system for your deck:
Remember, choosing a deck drainage system depends on your specific needs and preferences. Consulting with professionals experienced in deck construction and drainage systems, like our team here at Deck Bros, can help you make an informed decision that ensures optimal performance and satisfaction.

Assessing Your Deck Drainage Needs

To determine the most suitable deck drainage system for your specific requirements, it’s essential to assess your deck’s unique characteristics and your desired outcome. Consider the following factors:
Do you want to create a dry space beneath your deck, effectively turning it into an outdoor living room or usable area?
Are you planning to install an under-deck ceiling system to prevent water from dripping through the deck boards?
What is the current condition of your deck’s substructure? Is it structurally sound, or does it require repairs or reinforcement?

If you’re building a new deck, incorporate deck drainage into the design  to ensure a complete system from the start.

Is your deck on the second story or part of a two-story deck structure? These factors may influence the type of drainage system required.

Do you have specific plans for the space beneath your deck, such as installing a hot tub, an outdoor kitchen, or seating areas?

Assess how a deck drainage system can enhance the functionality and usability of your outdoor living space.

Consider the integration of a gutter system into your deck drainage solution.

Evaluate the effectiveness of the chosen drainage system in managing water runoff during heavy rainfall or storms.

If aesthetics are a priority, explore options for a finished ceiling beneath your deck, which can seamlessly integrate with your deck.

Evaluate how different deck drainage systems accommodate a finished ceiling and align with your desired design aesthetic.

Assess the level of maintenance required for different deck drainage systems. Consider your willingness and capacity too.


Homeowners believe an under-deck drainage system is worthwhile even though it costs a little extra to build a deck. The homeowner immediately understands the value of having a dry outside living space to enjoy inclement weather after the first storm. There’s no reason to let the rain ruin a party.
Pounding flanges into the crevices between your deck boards is one method of constructing a rain barrier beneath your deck. These spacers can prevent water from penetrating the deck boards and, if properly built, could act as little gutters to direct water away from the structure.

Tufdek Waterproof Vinyl Decking is the best material to waterproof under a deck. Tufdek is the finest way to create dry, usable space beneath your deck or other outdoor living areas. Tufdek is a PVC vinyl membrane with roofing grade that is completely attached to plywood and concrete surfaces.

deck drainage system repair

Get In Touch With Omaha's Deck Experts

If you don’t have to worry about deck drainage and care about the integrity and safety of your deck, contact us so we can look at your existing deck.

We specialize in building and repairing decks, offering a safe and personalized outdoor space that you and your family can enjoy for years!

At Deck Bros, we recommend our customers a high-quality composite decking material that’ll last even in the harshest winters. We provide the best solutions for your outdoor space and give you a reliable and professional deck building service!

If you want to find out more about which decking material will best suit your needs, call us today at (402) 369-5724 or request a free quote!