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UNDERDECK WATER DIVERSION SYSTEM INSTALLATION IN OREGON & WASHINGTON

Rick’s Custom Fencing & Decking installs underdeck drainage systems for homeowners throughout Oregon & Washington. These systems, sometimes referred to as underdeck water diversion systems, are designed to capture and redirect rainwater that passes through the deck boards above, helping create a dry and usable space beneath elevated decks. 

Many homeowners choose an underdeck drainage system when they want to make better use of the area below their deck for storage, seating, or additional outdoor living space. By guiding water away from the underside of the deck structure, these systems help reduce dripping and improve how the lower area functions during wet weather. 

Underdeck drainage systems are most commonly installed beneath elevated decks where water naturally drains between deck boards.

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Underdeck for a deck installed by Rick's

What an Underdeck Drainage System Does

An underdeck drainage system installs beneath the deck framing to manage water runoff from the deck above.

Instead of allowing rainwater to drip directly through the structure, the system captures water and diverts it toward a drainage path away from the space below. 

This approach helps keep the area beneath the deck more usable during rainy conditions while protecting items stored below the deck. 

Why Homeowners Install an Underdeck Water Diversion System

Underdeck drainage systems are typically installed to improve how the space below an elevated deck can be used. 

Creates Usable Covered Space Below the Deck 

By redirecting rainwater, an underdeck drainage system can help create a sheltered space beneath the deck for seating, storage, or other outdoor uses. 

Helps Manage Rainwater Beneath Elevated Decks 

Underdeck water diversion systems channel water away from the deck framing and guide it toward designated drainage areas. 

Improves the Function of Elevated Decks 

Many elevated decks leave an open area underneath that is exposed to rainfall. Installing a drainage system allows that space to be used more comfortably. 

Creates a Cleaner Finished Appearance Below the Deck 

Some underdeck drainage systems also provide a more finished look beneath the deck compared with exposed framing and joists. 

Rick’s installs underdeck drainage systems with attention to drainage direction, slope, and alignment so water flows properly away from the deck structure. 

Underdeck Water Diversion System Design Considerations

Underdeck drainage systems are typically installed beneath elevated decks where water drains through the deck surface. These considerations help determine whether an underdeck drainage system is a good fit for the deck structure.

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Elevated Deck Requirements

These systems work best with elevated decks that allow enough space beneath the framing for the drainage channels.

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Water Flow and Drainage Direction

The system must be installed with a slight slope so water moves away from the structure and toward a controlled drainage point.

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Use of the Space Beneath the Deck

Homeowners often plan the area beneath the deck for storage, seating areas, or covered outdoor space once a drainage system is installed.

18-Month, No-Interest Financing on Approved Credit

We want you to have the BEST at an affordable price and at the right time for you! That’s why we work with lenders in the Home Services industry to develop financing options that suit your needs. This month, enjoy 18-Month, no-interest financing on all installed projects!

Planning an Underdeck Drainage System Installation

Planning begins by reviewing the layout of the existing deck or the deck being installed. 

During the planning process, several factors are considered: 

  • Height and structure of the deck above 
  • Drainage direction for water runoff 
  • Access to the area beneath the deck 
  • How the space below will be used 

Careful planning helps make certain the system manages water effectively while improving how the space beneath the deck functions. 

Underdeck Drainage System Design Examples

Explore the gallery below and use the filters to view real-world examples of how underdeck drainage systems work.

Underdeck Drainage System Installation FAQs

Below are answers to some of the most common questions homeowners ask about underdeck drainage systems so you know what to expect.

    • Do underdeck drainage systems completely stop water from reaching the area below?

      Drainage systems are designed to capture and redirect most water runoff from the deck surface above.
    • Can the space under the deck be used after installing a drainage system?

      Yes. Many homeowners use the space beneath their deck for storage or additional outdoor seating once a drainage system is installed. 
    • Do underdeck drainage systems work with all decks?

      These systems are typically designed for elevated decks where water passes between deck boards. 
    • What is an underdeck drainage system?

      An underdeck drainage system is installed beneath an elevated deck to capture rainwater and redirect it away from the space below. 

Request an Estimate for an Underdeck Drainage System in Oregon & Washington

If youre considering an underdeck drainage system for your home in Oregon & Washington, we can help! Rick’s offers free estimates and can review your deck layout, then suggest options for the installation of an underdeck drainage system to improve how the space beneath your deck is used.

SCHEDULE YOUR FREE ESTIMATE!

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Sign up for our newsletter to get exclusive specials, backyard tips & tricks, and the latest news from Rick’s — straight to your inbox.

Clicking the 'Request Quote' button constitutes your express consent to be contacted by phone/email/text by Rick’s Custom Fencing & Decking. Message and data rates may apply. Text STOP to opt out.