Deckology

Deckology We design and build custom decks,
porches, patios, pergolas, railings, and related outdoor living features.

Deckology is a Southern Minnesota custom deck builder based in Mantorville, creating custom decks, porches, patios, pergolas, and outdoor living spaces with a focus on sound structure and lasting workmanship. Deckology is a Mantorville, Minnesota custom deck builder
serving homeowners in nearby communities, including Rochester, Byron, Oronoco, Pine
Island, Kasson, and select Owatonna properties. O

ur approach
puts as much attention on footings, framing, connections, and structural details as the
finished surface. We prefer full tear down and rebuild deck projects when an existing
frame cannot support the long-term life of new materials. Led by owner Marc Unnasch,
Deckology brings construction experience dating to 2010 and a consultative process
that helps homeowners understand materials, project details, and proposal differences
before they build.

Our latest project is a 17' x 14' deck featuring helical piles installed by Techno Metal Post, ProWood TrueFrame framing...
08/08/2026

Our latest project is a 17' x 14' deck featuring helical piles installed by Techno Metal Post, ProWood TrueFrame framing, PWT treated LVL beam, Deckorators Summit decking, and Digger Specialties Westbury c10 railings.

Deckorators Summit decking in Cliffside
Westbury c10 railings in Textured Black.

Today let's talk about re-skinning your deck vs. re-framing.  We generally always re-frame. Why?  More often than not wh...
08/03/2026

Today let's talk about re-skinning your deck vs. re-framing. We generally always re-frame. Why? More often than not when we remove all the deck boards, we find an improperly flashed ledger causing rotted wall sheathing, or posts rotted just below the ground, beams or the tops of the posts to be deteriorated. The tops of the joists usually have a crack up the center of them where all the deck boards were fastened. Many times the joists and/or beam are undersized and over spanned for current code requirements and existing joists are sagging between the house and the beam. We use products that will far outlast an old deck frame so why leave the old framing as the weakest link?

Give us a call for a thorough inspection of your current deck. We can discuss if a complete new deck or a re-skin is the best option for you.

507-398-3550

Our latest project is a 14' x 12' deck with Deckorators Voyage decking in Khaya and Digger Specialties Westbury railings...
07/15/2026

Our latest project is a 14' x 12' deck with Deckorators Voyage decking in Khaya and Digger Specialties Westbury railings in Textured Black, with 3" posts. We had a bit of wall rot on this one as the previous deck flashing had not been done properly. We were able to save the footings and posts to save the clients some money but we did re- frame everything else with ProWood True Frame lumber.

A few weeks ago we completed this project.  17' x 10' stamped concrete patio with a Deckorators Privacy Wall.
07/11/2026

A few weeks ago we completed this project. 17' x 10' stamped concrete patio with a Deckorators Privacy Wall.

We would be honored if you would nominate us for Best Deck Company in the Best of the Best contest, Home and Garden sect...
06/02/2026

We would be honored if you would nominate us for Best Deck Company in the Best of the Best contest, Home and Garden section. Thank you!

The nomination phase kicks off the competition, giving you the power to nominate the businesses or individuals you believe are the most deserving of the "Best of the Best" title. Select a category below to nominate a business or individual.

GoliathTech MN  was on site today for helical pile install! Helical piles are a great alternative to traditional concret...
05/08/2026

GoliathTech MN was on site today for helical pile install! Helical piles are a great alternative to traditional concrete footings. Give us a call to discuss this option for your project. (507) 398-3550

We just finished this beautiful 16' x 12' deck with a 4' x 4' landing and stairs featuring GoliathTech MN helical piles,...
04/19/2026

We just finished this beautiful 16' x 12' deck with a 4' x 4' landing and stairs featuring GoliathTech MN helical piles, Deckorators Summit collection decking, and Digger Specialties Westbury c10 railings.

Deckorators Summit decking in Boulder with Dark Slate accents on the picture frame, fascia, and risers.

Westbury c10 railings in Black Fine Texture.

No disturbing the grass and such a clean look with helical piles.

We are excited to announce that we are now offering helical pile foundations as part of our standard building practice.T...
04/02/2026

We are excited to announce that we are now offering helical pile foundations as part of our standard building practice.They are a great alternative to traditional concrete footings for our deck and covered deck/porch projects. These provide far superior frost protection as they are installed to a depth of 7' compared to 4', so we are well below frost depth. The 6x6 posts are able to sit a bit off of the ground so they are not nearly as susceptible to rot as posts installed below grade.

Reach out to discuss your new outdoor living space! (507) 398-3550

As it warms up outside, we start to get back to enjoying our decks and other outdoor spaces. Spring is the time to give ...
03/29/2026

As it warms up outside, we start to get back to enjoying our decks and other outdoor spaces. Spring is the time to give your deck a full inspection. Here's a list of things that should be inspected.

Are the support posts starting to rot just below grade?

Are the stair stringers solid or have damage?

Is the stair connection to the deck failing or pulling away?

Is water getting behind the ledger at the house?

Are the beams and joists starting to show signs of rot?

Is the railing solid or loose?

Are the deck boards solid, especially at any seams are they starting to get soft?

If you find any concerns or you'd like a full inspection of your deck, give us a call/text or email.

Are you thinking about upgrading your outdoor living space? Do you want more shade? Perhaps a screened patio under your deck or a covered/screened deck? Schedule an on-site meeting to discuss what we can do to turn your back yard into a dream outdoor living space!

Text/call 507-398-3550

Email: [email protected]

Unnasch Construction | Deckology is southeast Minnesota's choice for custom decks and interior remodels; get ready to re-imagine your outdoor living space. We craft stunning, low maintenance decks and outdoor spaces, install skylights that fill your home with natural light, and deliver high-quality....

Address

Services Available In:
Mantorville, MN
55955

Opening Hours

Monday 7am - 8pm
Tuesday 7am - 8pm
Wednesday 7am - 8pm
Thursday 7am - 8pm
Friday 7am - 8pm
Saturday 7am - 8pm
Sunday 7am - 8pm

Telephone

+15073983550

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