Under-Deck Drainage Systems in the Twin Cities

An aluminum drainage and ceiling system that helps keep the area below your deck drier through Minnesota weather.

WE’RE TRUSTED BY:

Haven Underdecking for Minnesota Decks

Midwest Decks installs Haven underdecking, an aluminum system built to manage water below the deck. It is the base for every underdeck drainage system and ceiling the company plans.

Haven panels installed under the joists to catch falling water
Aluminum material that holds up through Minnesota freeze-thaw cycles
Water directed to gutters and downspouts away from the structure
The same system supports an under-deck ceiling below the deck
Installation planned around your deck’s framing and height

An under-deck system helps keep the space below drier, but it does not make the area fully waterproof. Wind-driven rain, heavy storms, and humidity can still reach the space, and results also depend on proper installation and regular upkeep of the drainage.

Under-Deck Ceiling Finishes

An under deck ceiling gives the covered area below a clean, finished look. It also hides joists, framing, and fasteners from view.

Finished ceiling surface covering joists and structural framing
Aluminum panels that resist rust, rot, and warping
Ceiling finish selected to complement the home’s exterior
Flat, uniform look from the patio below
Space for recessed lighting in the ceiling plane
Fan-ready ceiling for added airflow below the deck

Under-Deck Waterproofing Details

Under-deck waterproofing depends on the details around the system, not just the panels. Flashing, joist protection, and sealed connections keep water out of places it should not go.

Flashing at the ledger board where deck meets house
Joist tape or protection to limit moisture on framing
Sealed seams and connection points between neighboring panels
Perimeter detailing that directs water into the drainage path
Posts and penetrations sealed where they pass through the system
Framing materials selected to work with the underdecking system

Dryspace Under Deck Living Areas

A dryspace under deck turns unused ground-level area into a covered outdoor room. It works well for seating, dining, or storage, though wind-driven rain can still reach the outer edges.

Covered seating and conversation area beneath the deck above
Dry storage for bikes, mowers, and outdoor equipment
Paver or concrete floor coordinated with the patio below
Outdoor dining space protected from rain and direct sun
Space for an outdoor kitchen or bar below the deck
Hot tub or spa area protected from rain and snow

A Custom Deck Builder with a Long Legacy

Trevor Judd leads Midwest Decks with 25-plus years of hands-on construction experience. The Midwest name has served Hennepin and Ramsey counties, as well as the western suburbs of the Twin Cities, since 1994. Our dedicated deck division launched in 2024 to meet demand from customers who already trusted the brand and wanted us to build their decks and outdoor living spaces.

OUR WORK

Find Inspiration for the Deck You Have Been Picturing

The details matter here: The railing profiles, the board patterns, the lighting placements. Browse the gallery and start picturing your own space.

REVIEW

Read What It Is Actually Like to Work With Our Team

The people in these reviews hired Midwest Decks, watched the crew work, and came back here to tell their stories.

OUR PROCESS

A Process Built Around Your Peace of Mind

The Midwest name has been a trusted name in the Twin Cities since 1994, which is why we have served over 70,000 homeowners.

1. Your Design

See 3D renders and a fixed price first.

2. We Handle It

We manage all permits and HOA paperwork.

3. Built Right

Weekly updates keep your project on track.

Delivering Premium Quality at Every Pricepoint

Every Midwest Decks project gets the same in-house deck builders, the same quality materials, and the same 10-year workmanship warranty.

Fresh Design Ideas

We will research your space and bring options you might not have considered before your consultation ends.

Control Your Costs

Our pricing process delivers your final number at the consultation based on your choices. Set your own price.

Build During Winter

Most deck companies stop when the ground freezes. Midwest Decks operates through winter, so projects stay on schedule.

Underdeck Dryspace FAQs

What does an under deck drainage system do?

An under deck drainage system catches water that passes between deck boards. It channels that water to a gutter or downspout and away from the space below. This keeps the area much drier, though wind-driven rain and humidity can still reach it.

Can I add an under deck ceiling to an existing deck?

In most cases, yes, as long as the deck framing is sound and reachable from below. The system installs between or beneath the joists. An on-site visit confirms whether your current framing and headroom work.

Is under deck waterproofing the same as sealing the deck boards?

No, they solve different problems. Board sealing treats the walking surface, while under-deck waterproofing manages water that passes through the boards. Both can work together on the same deck.

What can I use the space under my deck for?

A dry space under the deck works well for seating, dining, or storing outdoor equipment. It also pairs well with a paver patio below. The best use depends on ceiling height, grade, and how the space connects to the yard.