Dry Space Below
Enjoy a usable space beneath your deck.
Oasis Custom Decks
Under Deck Drainage System Installation
These systems redirect rain, snow melt, and moisture away from the deck so you can make the lower level a true outdoor living space.
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Turn the Space Under Your Deck into a Dry, Functional Area with a Dry Below Deck System
At Oasis Custom Decks, our experienced deck installers offer under‑deck drainage systems often called dry below deck systems that keep the area beneath your elevated deck dry, protected, and usable. These systems redirect rain, snow melt, and moisture away from the deck so you can make the lower level a true outdoor living space.
Types of Under Deck Drainage Systems We Install
Here are some of the under deck drainage systems and materials Oasis Custo Decks commonly works with, tailored for Front Range conditions:
DEK® Drain
Captures water through a system of channels under your deck and directs it safely away.
Provides complete protection of the deck’s substructure from moisture and rot.
Compatible with under‑deck finishes, lighting, ceiling fans, or storage solutions.
Backed by a 25‑year warranty for long‑lasting performance.
Aluminum / Under‑Deck Ceiling Systems
While not always called “drainage,” these systems provide a water tight ceiling beneath the deck by using interlocking aluminum panels and built in slope.
Panels are typically sloped to direct water into a gutter.
Weather resistant, durable materials ensure longevity in Colorado’s climate.
Many systems support lighting, fans, or other accessories.
Our Deck Repair Process
Benefits of an Under Deck Drainage System
1. Maximize Usable Outdoor Space
Instead of a soggy, unused area under your deck, you can gain a dry patio, storage space, or even a finished outdoor room.
2. Protect Structural Components
By diverting water away, you shield deck framing, joists, and substructure from moisture that can lead to rot or decay.
3. Combat Mold & Mildew
Moist spaces below a deck are breeding grounds for mold. Proper drainage helps prevent that dampness buildup.
4. Extend Deck Lifespan
Systems that keep water off the substructure can dramatically increase the longevity of your deck.
5. Energy Efficiency & Climate Control
A covered, sloped ceiling under the deck offers shading, which can reduce heat in summer and create a cooler, more comfortable space.
6. Aesthetic Finish
Many under deck systems provide a clean, finished ceiling appearance no exposed joists or messy gutters.
7. Warranty & Durability
High quality systems come with long lasting warranties for example, Trex offers a 25 year warranty on its drainage system.
Instead of a soggy, unused area under your deck, you can gain a dry patio, storage space, or even a finished outdoor room.
2. Protect Structural Components
By diverting water away, you shield deck framing, joists, and substructure from moisture that can lead to rot or decay.
3. Combat Mold & Mildew
Moist spaces below a deck are breeding grounds for mold. Proper drainage helps prevent that dampness buildup.
4. Extend Deck Lifespan
Systems that keep water off the substructure can dramatically increase the longevity of your deck.
5. Energy Efficiency & Climate Control
A covered, sloped ceiling under the deck offers shading, which can reduce heat in summer and create a cooler, more comfortable space.
6. Aesthetic Finish
Many under deck systems provide a clean, finished ceiling appearance no exposed joists or messy gutters.
7. Warranty & Durability
High quality systems come with long lasting warranties for example, Trex offers a 25 year warranty on its drainage system.
Why Choose Oasis Custom Decks for Your Under Deck Drainage System
Pittsburgh Climate Expertise
With over 25 years of experience as custom deck builders in Pittsburgh, we know how to build for heavy snow, UV exposure, and freeze thaw cycles.
Trusted Partnerships
We work with proven brands like TimberTech, and quality aluminum system providers.
Customized Solutions
Every deck is different. We tailor the system (slope, gutters, finish) to your specific structure and usage goals.
Durability & Warranty
We install systems backed by long warranties (Trex 25 year, TimberTech 25 year) to ensure lasting performance.
Clean, Professional Install
Our crews maintain a tidy workspace and ensure the final result looks as good as it functions.
Trex Rain Escape FAQs
What areas do you serve?
We proudly serve the greater Pittsburgh area, including Sewickley Heights, Fox Chapel, Edgeworth, Sewickley Hills, Marshall Township, Warrendale, Bradford Woods, Upper St. Clair, Wexford, Venetia (Peters Township), and many surrounding communities. Not sure if you’re in our service area? Give us a call!
What exactly is a “dry-below” or under‑deck drainage system?
It’s a system installed beneath your deck’s surface that captures rain, snow melt, and moisture, then redirects it through troughs and gutters so the area underneath stays dry.
Will the under‑deck system handle snow melt in Pittsburgh?
Yes, all systems that we install are capable of handling Colorados snowmelt.
Do I need a permit for an under‑deck drainage system in Pittsburgh?
Possibly, depending on local building codes and how the system is installed (especially if you’re finishing the underside or adding outlets). We handle permitting as part of our process.
Do you handle HOA requirements and permits?
Our contractors can absolutely handle permits in the Denver Metro area when they’re required. While we provide detailed quotes, contracts, and drawings for HOA submissions, homeowners are responsible for completing the HOA approval process.
Can I finish the ceiling below my deck once the drainage system is installed?
Yes — you can install tongue & groove, soffit panels, aluminum under‑deck ceiling systems, or other finishing materials. Many of these finish systems also support lighting or fans.
How much does an under‑deck system cost?
Cost varies based on: deck size, system type (gutter-based vs. panel ceiling), finish options, and slope complexity. We’ll provide a clear, itemized estimate after our on-site consultation.
What maintenance is required?
Maintenance depends on the system:
Trough/gutter systems: Occasionally check and clean gutters.
Panel systems: Inspect the panels, clean if needed, and ensure the slope is working properly.
Finished ceiling: Clean and treat per manufacturer guidelines.
Do You Offer Financing?
Yes! We offer financing through Hearth, which works with multiple lenders to find the plan that’s right for you. It only takes a few minutes to get pre-qualified.
How do I get started?
It’s easy — just request a free estimate through our website or call us directly. We’ll schedule a consultation, learn about your vision, walk your space, and put together a fair, detailed quote with no pressure and no obligation.