River Falls, WI · East Twin Cities Metro Mon–Fri 8a–5p · Sat by appt Owner-operated · Veteran-friendly (715) 307-8302

Patios & Porches · Mahtomedi, MN · Est. 2003

Patios & Porches in Mahtomedi, Minnesota.

Mahtomedi sits on the east shore of White Bear Lake in Washington County, with the small villages of Willernie and Birchwood tucked in beside it. It was resort country before it was a suburb, reached from St. Paul by streetcar, and the Wildwood amusement park stood at the south end of town until the 1930s. We install polyurea + polyaspartic floor coatings for Mahtomedi homeowners: diamond-ground prep, custom flake colors, 1–2 day install, written 15-year warranty. Three layers. Summer cottages from the 1900s through the 1930s along the lake and through the Old Village and Wildwood, winterized and added onto over the decades; a 1950s through 1970s ring behind them; and larger newer homes on the east side toward Highway 244 and the Dellwood line.

Patios & Porches in Mahtomedi

What an install looks like in Mahtomedi.

Mahtomedi is a resort town that became a suburb, and the concrete carries both histories. Through the Old Village and Wildwood and along the east shore, houses began as summer cottages between the 1900s and the 1930s and were winterized later, so the garage is often detached, unheated, and standing on a slab poured decades after the house it serves. Those slabs vary more than anything else we work on, because there was no single era or standard behind them. Behind that band, the 1950s through 1970s ring is conventional suburban housing with attached two-car garages that grind and coat predictably, and the newer building on the east side toward Highway 244 has modern slabs. Two things tie the lake side of town together: the water table, which is high within a few blocks of White Bear Lake and makes a moisture test worth doing before any lower-level floor is quoted, and the tree cover, which keeps outdoor slabs damp and is why anti-slip aggregate goes on nearly every patio and step here.

Patios & Porches specifically in Mahtomedi

Mahtomedi is a heavily wooded town and its patios show it. A shaded slab under mature oaks stays damp long after an open one has dried, and damp plus freeze-thaw is what causes surface scaling and algae. Anti-slip aggregate is standard on shaded slabs, on lakeside steps and on anything sloping toward the water. South-facing and open patios get the UV-stable polyaspartic topcoat so the color holds.

Neighborhoods we work in

  • Old Village
  • Wildwood
  • White Bear Lake east shore
  • Mahtomedi Avenue
  • Highway 244 corridor
  • Willernie and Birchwood Village borders
20+ Years installing Exterior coatings since 2003
1DAY Typical install Walk in 24h
LifeTIME UV warranty Won't yellow, ever
5.0★ Google rating From real homeowners

Why we don't install epoxy in Mahtomedi

Why acrylic sealers and epoxy fail outside, and what we install instead.

Most "concrete patio sealer" products at the box store are clear acrylics. They wear off in 12-24 months and offer minimal protection in the meantime. Epoxy is worse: yellows in sunlight within a year, then cracks the first winter. Both products fail on the basic problem: Wisconsin's freeze-thaw cycles demand flexibility and direct UV exposure demands UV-stable chemistry. Polyaspartic delivers both.

Acrylic Sealer / Box-Store Epoxy What you'll find at the home center
  • Acrylic sealers wear off in 12-24 months. Foot traffic, freeze-thaw, and UV exposure break down acrylic surface coatings fast. You're back at the home center every spring re-applying.
  • Epoxy yellows within a summer. Direct sunlight on epoxy turns it amber within months. By the second summer the floor looks chalked and aged.
  • Both crack across freeze-thaw. Wisconsin slabs expand and contract violently through winter. Rigid coatings fracture along the joints, then water gets under them, then the coating peels.
  • No real slip resistance. Smooth acrylic and epoxy get dangerously slick when wet. People fall on coated patios in rain, especially on stairs and stoops.
  • Salt and ice melt eat the bond. Calcium chloride and rock salt are aggressive on cheap coatings. The bond fails at the slab interface and the coating lifts.
Polyaspartic Exterior System What we install
  • Lasts 15+ years outside. Polyaspartic is the same chemistry used on industrial bridges and parking decks. It's engineered for outdoor permanence, not seasonal touch-up.
  • UV-stable to the molecule. Polyaspartic doesn't yellow, ever. The UV-resistance isn't a top-coat additive; it's the resin itself. Lifetime no-yellow warranty.
  • Flexible. Moves with freeze-thaw. Polyaspartic is approximately 100% more flexible than epoxy. Wisconsin slabs move; the coating moves with them.
  • Anti-slip aggregate standard. Every exterior install includes a slip-resistant aggregate broadcast in the topcoat. Texture level is dialed to the application: aggressive for stairs, smoother for covered patios where bare-foot comfort matters.
  • Salt + ice melt resistant. Polyaspartic handles the chemicals Wisconsin winters throw at it. We've installed exterior coatings since 2003; the warranty exists because the failure mode genuinely doesn't happen.

If you've been pricing "concrete patio sealers" or "patio epoxy," polyaspartic is the upgrade those terms should resolve to. Higher upfront cost than acrylic ($8-10 / sq ft vs $0.50-1.00 / sq ft for sealer), dramatically longer lifespan, and you're not back at the home center every spring.

Mahtomedi Pricing

Patios & Porches cost in Mahtomedi, MN: $7–9 per sq ft.

Pricing is upfront. Every number includes diamond-ground prep, polyaspartic system, anti-slip aggregate, your color choice, and the lifetime no-yellow warranty. Exterior installs price slightly higher than interior because polyaspartic resin costs more than polyurea + the prep work has to handle weather damage on the slab.

Small / Covered

150 sq ft

small covered patio or porch

From $1,200 to $1,500
  • Polyaspartic decorative flake
  • Anti-slip aggregate
  • Spalling repair if needed
  • Done in 1 day
Get my number
Most Common

250 sq ft

typical patio

From $2,000 to $2,500
  • Polyaspartic decorative flake
  • Anti-slip aggregate
  • Crack & joint repair
  • Done in 1 day
Get my number
Large / Open-Air

400+ sq ft

large patio or wraparound

From $3,200 to $4,400
  • Quartz system for direct weather
  • Maximum slip resistance
  • Phased install possible
  • Done in 1-2 days
Get my number

Stoops, steps, and walkways often combine with a patio job for bundled pricing; equipment is already on-site, so adding ~50-100 sq ft of stairs or path runs $400-800 instead of standalone pricing. Send four photos and Dave will text back a real number same-day.

The 6-step install

How we install your floor in Mahtomedi.

Same checklist on every floor. The reason our coatings still look new at year ten when the cheap stuff peeled in year two.

  1. 01

    Diamond grinding

    Industrial diamond-tooled grinders open the concrete pores and remove old sealers, paint, and weather-damaged surface layer. Concrete that's been exposed to weather for years has a weakened top; grinding removes it down to sound substrate.
  2. 02

    Crack repair + spalling patch

    Cracks get filled with flexible polyurea joint filler. Spalled areas (where the surface has flaked off in chunks) get rebuilt with polymer-modified concrete repair compound. Soft or unsound areas are addressed before any coating goes down.
  3. 03

    Polyaspartic basecoat

    Full polyaspartic basecoat, not polyurea-base. Polyaspartic is UV-stable from the resin up. There's no risk of substrate yellowing showing through the topcoat over time.
  4. 04

    Anti-slip aggregate broadcast

    Kiln-dried silica sand or decorative flake is broadcast into the wet basecoat. Density and aggressiveness dialed to the application: heavier for stairs, lighter for covered patios where bare-foot comfort matters.
  5. 05

    Polyaspartic UV topcoat

    Final UV-stable polyaspartic topcoat seals the system. This is the layer that delivers the lifetime no-yellow warranty + handles direct sunlight, rain, snow, and salt without degradation.
  6. 06

    Written 15-year + lifetime UV warranty

    15-year written warranty against chip, crack, and peel under normal exterior use. Lifetime warranty against UV fading on the topcoat. The exterior warranty document is handed to you at install completion.

Mahtomedi questions

Common questions for Mahtomedi homeowners.

Our house started as a lake cottage. Is the garage slab likely to be usable?
Usually, and it has to be looked at rather than assumed. Cottage-origin garages in Mahtomedi were built at all different times, so a slab might be from the 1930s or from the 1970s and there is often no record either way. The grind tells us most of it. What rules a slab out is structural: one broken into pieces that move independently, or one pushing water up through itself.
We are a block off White Bear Lake. Will a coating hold on our lower level?
That depends on what the slab is passing, which is why we test it. A calcium chloride moisture test gives a number. Low readings take standard polyurea. High readings take a vapor-mitigation primer underneath first, which is what keeps a coating attached to a slab near a lake.
Do you cover Willernie and Birchwood Village too?
Yes. They sit inside the same few blocks as Mahtomedi on the east shore, and they are quoted the same way. White Bear Lake, on the other side of the water, has its own page.
Is polyaspartic better than acrylic sealer for a concrete patio?
Yes, by 10-15× the lifespan. Acrylic sealers wear off in 12-24 months and offer minimal protection. Polyaspartic lasts 15+ years, doesn't yellow, doesn't peel, doesn't need re-application. The math: 5 acrylic re-seals over 15 years (DIY ~$200 each + labor) vs. one polyaspartic install ($2,000-2,500 for a typical 250 sq ft patio) that's done. The professional install is competitive on lifecycle cost and dramatically better-looking the entire time.
How much does a concrete patio coating cost in Wisconsin?
Polyaspartic patio coatings in River Falls, WI run $8-10 per square foot fully installed. A typical 250 sq ft patio is $2,000-2,500 all-in. Larger patios (400+ sq ft) come in at $3,200-4,400. Bundling stoops or walkways with a patio job runs ~$400-800 less than standalone because the equipment is already on-site.
Will the patio coating crack through Wisconsin winters?
Polyaspartic is engineered for slab movement and freeze-thaw. The basecoat is roughly 100% more flexible than epoxy and moves with the concrete through temperature swings. We've installed exterior coatings across western Wisconsin and the east Twin Cities since 2003; the cracking failure mode genuinely doesn't happen on a properly prepped polyaspartic install.
Will it yellow in the sun?
No. Polyaspartic is UV-stable to the molecular level; the chemistry doesn't yellow, ever. We back this with a separate lifetime warranty against UV fading. Epoxy yellows within a summer; polyaspartic does not.
Is the patio surface slip-resistant when wet?
Yes. Every exterior install includes anti-slip aggregate broadcast into the topcoat. Texture level is calibrated to the use case: aggressive for stairs and stoops (where wet feet must not slip), smoother for covered patios where bare-foot comfort matters. We discuss the texture preference at the on-site quote.
When is the best time to coat a patio in Wisconsin?
Spring (April-June) and fall (September-October). The slab needs to be dry and the air temperature between roughly 50°F and 85°F for proper cure. Summer humidity slows it; winter is too cold. Exterior season is short in Wisconsin so book 4-6 weeks ahead during peak months.
Can you coat over an old, peeling concrete sealer?
Yes. Diamond grinding removes most old sealers, paints, and previous coatings cleanly. Anything that doesn't come off with grinding gets addressed before the new system goes down. By the time the polyaspartic basecoat is rolled on, the slab is clean substrate.
What about spalled or chipped concrete, can you still coat it?
In most cases, yes. Spalled areas get rebuilt with polymer-modified concrete repair compound during prep, then the coating goes over a smooth surface. The exception: slabs that are structurally compromised (significant frost heave, deep spalling, foundation issues) should be replaced, not coated. Dave will say if your slab needs replacement instead of restoration.
What's covered under the warranty for an exterior coating?
15-year written warranty against chip, crack, and peel under normal exterior use. Lifetime warranty against UV fading. Exclusions: damage from abuse (vehicle parking, dropped weights, etc.), neglect, or improper chemical exposure. The warranty document is real; handed to you at install completion.
Can you coat a wraparound porch or wood-and-concrete combo?
We coat the concrete portions only. If your porch is mixed wood deck + concrete, we coat the concrete and you handle the wood with a deck stain or coating separately. We can quote both portions at the on-site visit and recommend a wood finish that complements the concrete coating color.

More in Mahtomedi

All the services we offer in Mahtomedi, MN.

Whatever the slab (garage, basement, patio, mudroom, commercial) gets the same diamond-ground prep, same polyurea + polyaspartic system, same 15-year warranty. Bundle pricing if you book multiple rooms in one visit.

Patios & Porches elsewhere

Patios & Porches in nearby cities.

Same diamond-ground prep, same polyurea + polyaspartic system, same 15-year warranty across our entire service area. If you're outside {city}, here's where else we install.

← See Patios & Porches details and full service area

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Ready for a patios & porches install in Mahtomedi?

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  • Written 15-year warranty
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