Dry Decking Systems: Under-Frame vs. Over-Frame

covered deck

The Coloradan’s Quest for a Dry Deck

If you’ve ever sprinted under your deck during a Colorado Springs downpour, only to find yourself drenched, you’ve probably thought: There has to be a better way. Enter dry decking systems—the superhero your deck needs to fend off rain, snow, and the occasional stray sprinkler. But with great power comes great responsibility: choosing between under-frame and over-frame systems.

At Southern Mesa, we’re here to guide you through the world of dry decking. In this article, we’ll break down the two main systems, dive into how they work, and show you why we’re team over-frame all the way. By the end, you’ll feel like a dry decking expert (and your patio furniture will thank you).

What Are Dry Decking Systems?

Let’s start with the basics. A dry decking system is like an invisible umbrella for the underside of your deck. It catches water that seeps through the gaps in your deck boards, preventing it from dripping below. This transforms your under-deck area into usable, weatherproof space—ideal for storing outdoor gear, creating a shaded hangout, or just keeping your dog’s bed dry.

In Colorado Springs, where rain, snow, and blazing sunshine can all show up in a single day, a dry decking system isn’t just a luxury—it’s practically a necessity.

Understanding Under-Frame Dry Decking Systems

How Under-Frame Systems Work

Under-frame systems are the “catchers” of the decking world. Imagine your deck boards are a sieve, letting water drip through to the joists below. An under-frame system installs beneath the joists, catching the water with a series of gutters or panels. These channels then direct the water away from the structure, keeping the area under the deck dry.

Think of it as a drainage system hiding under your deck, quietly doing its job while you sip your morning coffee (or evening wine).

Benefits of Under-Frame Systems

  1. Cost-Friendly: Under-frame systems tend to be cheaper upfront, which is great if you’re working with a tight budget.
  2. Easy Retrofits: Have an existing deck? No problem! These systems are relatively simple to add without a full deck overhaul.

Common Issues with Under-Frame Systems

But here’s where under-frame systems start to show their cracks (literally):

  • Debris Magnet: Leaves, dirt, and other debris can clog the channels, turning your under-deck area into a science experiment. Regular cleaning becomes a must.
  • Leak Risk: If not installed perfectly, water can still sneak through, potentially damaging the wood or causing mold.
  • Short Lifespan: Let’s just say these systems age faster than milk left out on a hot day.

Understanding Over-Frame Dry Decking Systems

How Over-Frame Systems Work

Now let’s talk about the big leagues: over-frame dry decking systems. These systems are installed above the deck joists, creating a completely waterproof barrier before the deck boards are even laid. The secret weapon? The EPDM (Ethylene Propylene Diene Monomer) membrane—a superhero layer that keeps water from ever touching the wood beneath.

Picture this: Instead of water trickling down through your deck and being caught below, over-frame systems stop the water in its tracks at the top. It’s like having a raincoat for your deck, but one that looks way cooler.

Benefits of Over-Frame Systems

  1. Superior Waterproofing: Water doesn’t stand a chance. The EPDM membrane creates a seamless shield, protecting everything below.
  2. Built to Last: Unlike under-frame systems, over-frame setups are durable and can withstand Colorado’s extreme weather—from scorching summers to snowy winters.
  3. Low Maintenance: No gutters to unclog or panels to replace. Install it, enjoy it, and let it do its thing.

Key Differences Between Under-Frame and Over-Frame Systems

Here’s a quick breakdown to help you compare:

Feature

Under-Frame

Over-Frame

Installation

Beneath Joists

Over framing, under boards

Waterproofing

Can leak if not sealed properly

Full waterproof barrier with EPDM membrane

Durability

Prone to wear from debris and water

Long-lasting and weather-resistant

Maintenance

Regular cleaning required

Minimal maintenance needed

Cost

Lower initial cost

Higher initial investment, better value

Potential Problems and Solutions

Even the best systems aren’t without their challenges, but here’s the good news: Southern Mesa knows how to handle them all.

Common Challenges with Dry Decking Systems

  • Under-Frame Problems: Debris buildup, leaks, and the need for constant cleaning.
  • Over-Frame Considerations: Higher initial cost and the need for professional installation to ensure proper waterproofing.

Southern Mesa’s Solutions

At Southern Mesa, we specialize in over-frame EPDM membrane systems. Our team ensures a flawless installation, so you don’t have to worry about leaks, improper sealing, or wasted materials. Plus, our systems are designed to last, giving you peace of mind and a dry, usable space beneath your deck for years to come.

Costs of Dry Decking Systems

Let’s talk numbers because, let’s face it, cost matters.

Cost of Under-Frame Systems in Colorado Springs

Under-frame systems typically range from $3 to $6 per square foot. While they’re more affordable upfront, keep in mind the added maintenance and shorter lifespan.

Cost of Over-Frame Systems in Colorado Springs

Over-frame EPDM systems, like the ones we install at Southern Mesa, cost between $8 and $12 per square foot. Yes, the initial investment is higher, but the long-term savings in maintenance and repairs make it well worth it.

Choosing the Right Dry Decking System for Your Home

When it comes to dry decking systems, the choice is clear. While under-frame systems might seem like an easy solution, their maintenance headaches and shorter lifespan can quickly outweigh the lower cost. Over-frame EPDM membrane systems, on the other hand, offer superior waterproofing, durability, and long-term value.

At Southern Mesa, we believe in doing things right the first time. That’s why we exclusively use over-frame systems for our clients in Colorado Springs. If you’re ready to upgrade your deck and create a dry, usable space beneath it, give us a call. Your deck deserves the best, and so do you.

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Please use the following form to send us a message. We can also be reached by phone at 719-424-8735. We look forward to hearing from you.

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