At Marvel Builders, we’re always on the lookout for products that solve real homeowner problems with quality and style. This week, we’re hard at work on an exterior upgrade that checks both boxes: replacing an old under-deck drainage system with the InsideOut® Underdecking System from Quality Edge.


Why Underdecking?
Many homes with elevated decks have a huge missed opportunity right beneath them. Without proper drainage and protection, the area under the deck often becomes a muddy, unusable mess after every rainfall. An underdecking system changes that by catching water that comes through the decking boards and diverting it away via a hidden gutter system — transforming the space below into a dry, functional zone.
Whether it’s used for outdoor storage, a shaded hangout spot, or simply to protect patio furniture from the elements, underdecking can dramatically improve the practicality of a backyard.
Our System of Choice: InsideOut® by Quality Edge
We’ve used a few different systems over the years, but we keep coming back to InsideOut® by Quality Edge for a reason. It’s an all-aluminum ceiling and drainage system that’s designed to perform and built to last. The baked-on finish resists rust, peeling, and water staining, while the tongue-and-groove panels snap together to create a clean, finished ceiling look.
It’s more than just drainage — it’s an upgrade to your entire outdoor experience.
This Week’s Progress
We’re currently about halfway through the installation at a home that had an aging, ineffective underdeck solution. Our team removed the old system, inspected the framing for any signs of damage, and began installing the new panels. The transformation is already visible.
The job involves:
- Careful panel layout for consistent lines and aesthetics
- Integration with the home’s existing gutter system for proper drainage
- Flashing and sealing to ensure long-term protection from leaks
- Custom cutting and fitting around posts and trims
As always, we’re taking the time to make sure the install is clean, tight, and built to last — no shortcuts.
What’s Next?
Once the paneling is complete, we’ll finish tying in the downspouts and make sure everything is sealed and draining as it should. After that, we’ll do our final walk-through and leave behind a space that feels like a real extension of the home — dry, protected, and ready to enjoy in any weather.
We’re excited to show you the full transformation once it’s wrapped up!
Project Details:
📍 Location: Southeastern PA
🔧 Scope: Underdecking system replacement
🧰 Product: Quality Edge InsideOut® Underdecking System (Aluminum – Finished Ceiling Look)
🛠️ Status: In Progress