Stop letting a wet, unusable patio or basement entrance ruin the space beneath your deck. As an underdeck waterproofing contractor in Atlanta, GA, at Kirchner Customs, we design and install custom underdeck waterproofing systems that capture and divert rain and moisture, creating a dry, sheltered living area directly below your existing deck.
We apply proven, durable materials to build a seamless system, effectively extending your home’s usable square footage without major construction.
Why Install an Underdeck System?

An underdeck system is a practical, functional upgrade. It resolves moisture issues and adds permanent value to your property.
- Added Dry Space: The system creates a clean, fully dry area ideal for seating, storage, or protecting items such as furniture and grills.
- Property Protection: It protects the structural components (joists and beams) of your existing deck from constant exposure to rain, significantly extending the lifespan of your investment.
- Finished Appearance: The underside of your deck is covered with a clean, ceiling-like finish, drastically improving the view from your ground-level patio or basement entrance.
- Effective Water Management: Our custom-fitted systems direct rainwater efficiently. Water collects and channels away from your home’s foundation.
- Customizable Finish: Ceiling panels come in multiple colors and finishes. You select an appearance that complements your home’s trim or patio area. The underdeck looks like an actual outdoor ceiling.
Our Waterproofing Design and Materials
We select materials specifically made for Georgia’s climate and high-moisture environments.
System Components
| Component | Purpose & Material |
| Gutter/Trough System | Heavy-gauge aluminum troughs are installed beneath the deck boards to capture all runoff water. |
| Ceiling Panels | Durable vinyl or aluminum panels snap into the frame to create a finished, ceiling-like appearance that sheds water into the troughs. |
| Downspouts | Water is channeled from the troughs into downspouts that direct moisture away from your house and foundation. |
Materials Advantage
- Low-Maintenance Vinyl/Aluminum: Vinyl and aluminum resist mold, mildew, warping, and fading. Only occasional cleaning is necessary.
- Custom Fit: Every system is measured and cut on-site to account for existing deck posts, beams, and angles. The result is a seamless, leak-proof system.
The Kirchner Customs Difference
Kirchner Customs, a family-owned business, delivers high-quality craftsmanship in the Greater Atlanta area.
- Hands-On Expertise: Founder Derek Kirchner oversees every project to maintain high standards and accountability.
- Specialized Knowledge: With over 10 years of experience, we are a trusted local contractor skilled in waterproof outdoor systems.
- Streamlined Process: We handle scheduling, material delivery, and a final walkthrough to ensure your project is completed efficiently.
- Certified Installers: Our installers follow best practices for structural integration and construction quality.
- Warranties and Protection: We support our work with a 1-year workmanship guarantee. All materials come with robust manufacturer warranties.
Ready to Update Your Dry Space?
Stop letting the space beneath your deck go to waste. As your specialized underdeck waterproofing contractor in Atlanta, GA, Kirchner Customs delivers superior products and installation across North Atlanta.
Discover how easy it is to create a functional, dry outdoor room. Contact us today to schedule your consultation and see the exact plan for your home.
