Concrete Patios Contractor
in Seattle, WA

Anyone who has spent a July evening in Seattle knows exactly what is at stake. The light lingers until nearly ten at night, the air smells like cedar and salt water, and the whole city migrates outdoors. A well-designed concrete patio is the anchor of that experience, the surface that transforms a sloped, muddy backyard into a genuine outdoor living room. At Cloud Concrete of Seattle, we design and pour patios that are engineered for year-round Pacific Northwest conditions, not just the glorious three months of summer when everything is easy. The challenge with Seattle patios is that the other nine months of the year are working against you. From October through June, the region receives the bulk of its 37-plus inches of annual rainfall, and a patio that was not specifically designed for drainage will pool, stain, and deteriorate far ahead of its expected lifespan. Before we ever touch a form board or order a yard of concrete, we study how water currently moves across your property. We look at the grade relative to your house foundation, the location of downspouts, and the soil conditions that determine how quickly water will drain away from the slab. Many Seattle backyards, particularly in neighborhoods like Greenwood, Ravenna, and Columbia City, sit on heavy glacial clay that drains very slowly, requiring us to integrate perimeter French drains or surface channel drains into the patio design. Once drainage is solved, the structural build begins. We excavate to remove the native soil, install a compacted gravel base of four to six inches to provide both stability and drainage capacity beneath the slab, and then set our forms with precision laser levels to ensure an absolute minimum two-percent slope away from the house. The concrete mix we specify for residential patios is a minimum 3,500 PSI standard mix, upgraded to 4,000 PSI or higher for larger slabs or sites with challenging soil conditions. We reinforce every slab with a welded wire mesh or rebar grid depending on the size and load requirements, and we cut control joints at regular intervals to manage the natural shrinkage cracking that occurs as concrete cures. Finishing is where the patio takes on its personality. The most practical and cost-effective choice for a Seattle outdoor slab is the broom finish, which creates a fine directional texture that sheds water and provides reliable traction even when wet. For homeowners who want something more distinctive, we offer a full suite of decorative options. Exposed aggregate finishes are extremely popular for their natural appearance and outstanding slip resistance, particularly around hot tubs and outdoor kitchens. Stamped concrete patterns in stone or tile configurations can elevate a standard backyard into something that feels intentionally designed. Integral color or acid staining adds depth and warmth that plain gray simply cannot match. Many of our clients pair their new patio with complementary concrete features. A set of concrete steps connecting the patio to the back door eliminates the trip hazard of mismatched grade changes. A concrete retaining wall along the back or side edge of the patio creates a level usable surface on what was previously a sloped and unusable yard. Concrete curbing around adjacent garden beds defines the space and prevents landscape material from washing onto the patio surface during heavy rain events. We handle every aspect of the project from initial design consultation through final sealing, including any permit requirements for your specific neighborhood and lot. Call us at (206) 495-0997 for a free on-site estimate, and let us help you design the patio that will make those long Seattle summer evenings something your family looks forward to for decades.