Exploring the Best Materials for Underdeck Systems

An underdeck system is an excellent way to enhance the appearance and functionality of your outdoor space. It is a versatile addition that not only protects the space under your deck from rain and other weather elements but also adds an aesthetic appeal. However, choosing the right materials for your underdeck system can make all the difference in terms of durability, aesthetics, and performance.

In this article, we will explore the best materials for underdeck systems to help you make an informed decision.


Aluminum is a popular material for underdeck systems due to its durability, resistance to rust and corrosion, and low maintenance needs. It is also lightweight and easy to install, making it a favorite among DIY enthusiasts. Aluminum underdeck systems come in a variety of colors and styles, making it easy to match any outdoor decor.


PVC (polyvinyl chloride) is another popular material for underdeck systems. It is highly resistant to moisture, UV rays, and mold and mildew growth, making it an excellent option for areas with high humidity. PVC is also lightweight, making it easy to handle and install.


Composite materials are a combination of plastic and wood fibers. They offer the best of both worlds, combining the durability and low maintenance of plastic with the natural look of wood. Composite materials are highly resistant to moisture and insects, making them an excellent choice for underdeck systems.


Steel is a robust and durable material that can withstand harsh weather conditions and heavy foot traffic. It is resistant to rust and corrosion, making it a long-lasting option. However, steel is heavier than other materials and may require professional installation.


Wood is a classic choice for underdeck systems, providing a natural and warm aesthetic to your outdoor space. Cedar and redwood are popular choices for their durability and resistance to rot and decay. However, wood requires regular maintenance to prevent rot and decay, which can make it a less practical choice for some homeowners.

The materials you choose for your underdeck system will affect its durability, performance, and aesthetics. Aluminum, PVC, composite, steel, and wood are some of the best materials for underdeck systems, each with their unique features and benefits. Ultimately, the right material will depend on your specific needs, budget, and personal preferences. By exploring your options, you can choose the best material for your underdeck system, ensuring a beautiful and functional addition to your outdoor space.

RainAway Under Deck Systems

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  • Customer Testimonials
    Almost one (very rainy) year ago, we used RainAway Deck Drain Systems to install our underdeck system at our home. It is fabulous. It is life changing. We now enjoy grilling, entertaining, reading, writing, relaxing on our patio under the deck. Rain or shine, we can still be outside and comfortable! After researching and talking to other similar companies, we chose RainAway. The quality, care and attention to every detail by the employees was amazing. And they take great pride in their work and want to make sure the customer is happy with the product. And the quality of the ...
    Couldn't be happier! Jeff was very helpful in answering a lot of the questions we had and was always quick to respond. He was able to get us scheduled and the team came out and did a tremendous job installing it within day. No leaks, it looks great, and now we have an extra living space outdoors to stay cool and dry! Thanks Jeff!
    Jeff Butler and his team did a GREAT JOB on our project!!! His crew was courteous and professional and finished the work on schedule and on budget. The finished product is better than we had imagined and we will enjoy it for many years to come.