Why Does a Concrete Coating Turn Yellow?

A Real Fix on a Farmington Pool Patio

Most concrete coating failures that show up as yellowing after a few months come down to one thing: the coating chemistry wasn't built to handle direct UV exposure long-term. A patio or pool deck coated with the wrong product can look great on day one and start discoloring within a season — especially in a sun-heavy market like Farmington. The fix isn't just a fresh coat of the same thing; it starts with identifying why the first one failed and choosing a UV-stable system this time. Here's what that looked like on a real pool patio we're currently working on in Farmington, NM.

The Problem

In Frank and Patti's own words, from the sales call: “It looked beautiful until the sun hit, and then after about 3, 4 months started yellow.” The existing coating on this Farmington pool and hot tub patio had discolored from UV exposure and had an old oil stain that never fully lifted. On inspection, the crew also found several areas of surface pitting on the patio concrete, marked and measured directly on-site, plus moisture and hardness readings taken on-site to confirm the slab was sound enough to coat rather than replace.

Why This System, Not Another One

The crew specified the Penntek Evolution System in a Pecan flake over a Tan base coat, chosen specifically because it carries a lifetime guarantee against chipping, peeling, and fading — backed directly by Penntek as the national manufacturer, not just SHI as the local installer (more on why we choose Penntek) — directly addressing the failure mode Frank and Patti had already lived through with their prior coating, the same UV-failure pattern that shows up on a lot of outdoor coatings in this climate. Before quoting the job, the crew mapped the full pool-deck and patio area, tested surface hardness and moisture in multiple spots, and pulled a physical color sample on-site so Frank and Patti could see the actual finish against their existing patio, not a catalog photo.

What to Expect

Before any quote is written, the crew maps the full surface, tests hardness and moisture in multiple spots, and pulls a physical color sample on-site so you can see the actual finish against your own patio, not a catalog photo — the same process Frank and Patti went through before their install date was set.

Why It Matters for You

If your patio or pool deck coating has started yellowing, chalking, or peeling after a season or two in the sun, that's usually a sign the wrong system was used the first time — not that coatings don't work here.

Schedule Your Free On-Site Consultation

(970) 749-5415

southwesthi.com

Serving Durango, Bayfield, Pagosa Springs, and the entire Four Corners

 Southwest Home Innovations is a family-owned, locally operated company serving the Southwest Colorado, and Northwest New Mexico. We're the exclusive Gutter Helmet® dealer for Durango, Pagosa Springs, and Bayfield, and we install across the entire region from Durango to Farmington. We've been protecting mountain homes from water and ice damage for decades.