A wraparound walkway, a stepped patio, and a detached fire pit pad all coated with the certified Penntek polyurea system, including every step riser and curved edge.
Most outdoor concrete in Snohomish County spends nine months a year wet. Moss creeps into the pores, the surface goes slick, and every winter freeze pushes the cracking a little further along. This Snohomish homeowner had a wraparound walkway, a stepped patio, and a fire pit pad all headed that direction at once. Cascade Concrete Coatings brought the full Penntek certified polyurea system to every square foot of it, including the step treads, the risers, and the curved edges, delivering an outdoor surface built to handle Western Washington weather for decades.
Bare exterior concrete is porous. Water gets in, moss takes hold, and the surface turns slick right when you need footing the most. Add oil from the grill, tannins from the maple, and a freeze-thaw cycle that repeats all winter, and you get a patio that looks tired by year five and unsafe by year ten. Pressure washing buys a season. Sealers buy two. Neither one fixes what is actually happening inside the slab.
The walkway, the patio, the steps, and the detached fire pit pad were each ground and profiled so the coating had a mechanical bond to grip.
Slab temperature, air temperature, moisture content, humidity, and dew point were all measured and confirmed before a drop of product went down. On exterior concrete in this climate, those readings decide whether a floor lasts twenty years or fails in two.
Cracks and surface damage were repaired with Penntek rapid-cure mender before coating, so old problem spots did not telegraph through the finish.
Step risers, slab edges, and the curved perimeter were all coated by hand. Freeform slabs like these have no straight lines to hide behind, so every edge had to be cut clean.
The base penetrates and bonds into the open pores of the concrete at over 1,300 PSI, becoming part of the slab instead of a layer sitting on top of it.
Full flake broadcast gives the surface texture and grip, then the polyaspartic topcoat seals it into a non-porous finish that sheds water and cleans with a hose.
Epoxy does not belong outside. UV exposure yellows it, and it has almost no flex, so the first hard freeze cycle pops it off a slab that moves. Penntek polyurea is a different chemistry. It stays flexible enough to move with the concrete through Snohomish winters, and the FadeLock UV package in the topcoat keeps the color from going amber under direct sun. The finished surface is non-porous, so moss has nothing to root into and water has nowhere to sit. It also cures in a single day even in cool, damp Pacific Northwest conditions, which is why this whole outdoor footprint went from bare concrete to finished in one visit.
Every Cascade Concrete Coatings installation using the Penntek certified system carries the Penntek Limited Lifetime Residential Warranty, covering both the product and the installation. That warranty only exists through certified Penntek dealers, and Cascade is one of them.
Cascade has coated garages, shops, patios, walkways, and commercial floors throughout Snohomish County and the greater Seattle area. The same certified system and the same crew go into a backyard fire pit pad as go into a 3,000 square foot shop. See the covered patio project in Stanwood and this Seattle walkway transformation for more outdoor work.
If your outdoor concrete is going green, going slick, or going to crack, this is what a certified Penntek installation looks like. Cascade Concrete Coatings serves Snohomish and the greater Seattle area with free in-home quotes and same-day installs. No pressure, no obligation.
Here's just a few of our previous projects.
