Deck & Porch Painting in St. Louis

Your deck takes more abuse than any other painted surface on your property. It faces full sun, rain, snow, foot traffic, furniture scraping, and grill grease. The finish on a deck works harder than the paint on your walls, your siding, or even your fence. That is why deck painting and staining requires the right products, the right prep, and the right approach.

At OnDemand Painters, we paint and stain decks, porches, and outdoor living areas. Here is how we handle every deck project.

Inspection and cleaning

We start with a thorough inspection. We check every board, step, railing, and post for condition. Soft spots, popped nails, loose boards, and structural issues get identified before we do anything else. A deck has to be structurally sound before we finish it. There is no point in painting a board that needs replacing.

Cleaning comes next. We power wash the entire deck to remove dirt, mildew, gray weathered wood fibers, and any old finish that is flaking. On decks with heavy mildew or algae, we apply a deck cleaning solution before power washing to kill growth at the root. After washing, we let the deck dry completely. Usually 48 hours depending on weather. Moisture trapped under paint or stain is the number one cause of finish failure on decks.

Repairs and sanding

Repairs happen while the deck dries. We replace cracked or rotted boards, re-secure loose decking, replace rusted or popped fasteners with deck screws, and tighten railing connections. Minor repairs are part of the project. If we find major structural issues. Rotted joists or failing ledger boards. We will flag those separately.

After the deck is dry and repaired, we sand the surface. Sanding removes raised wood grain from power washing and smooths out rough spots that could splinter. On previously painted decks, we sand to remove any peeling areas and feather the edges so the new coat goes on smoothly.

Stain or paint?

Now the finish decision: stain or paint?

Stain penetrates the wood and protects from within. It comes in transparent, semi-transparent, and solid options. For deck floors that get foot traffic, solid stain or semi-transparent stain are the most popular choices. Stain does not peel the way paint does. It wears away gradually, which means recoating is simpler and requires less prep.

Paint creates a film on top of the wood. It gives you full color options and a uniform look. But paint on a horizontal deck surface takes a beating from foot traffic, sun, and water pooling. It can peel and chip, and when it does, the prep work to repaint is significant. If you do choose paint for a deck floor, we use porch and floor enamel that is formulated to handle foot traffic and moisture.

Application details

For both paint and stain, we add a non-slip additive to the floor coat if requested. This gives the surface a slight texture that reduces slipping when the deck is wet. Especially important on steps and around pools.

Railings, balusters, and posts get treated separately from the floor. These vertical surfaces can handle paint or stain equally well. We brush railings and balusters by hand to make sure every surface gets full coverage. Spray and backbrush on larger railing sections for efficiency.

We use Sherwin-Williams and Benjamin Moore deck products with UV inhibitors, mildew resistance, and water repellent built in. These products are formulated specifically for horizontal wood surfaces that take weather and traffic.

Timeline and ongoing care

Most deck projects take two to four days depending on size, condition, and whether railings are included. We need dry weather and temperatures above 50 degrees. We protect landscaping and siding adjacent to the deck during the project.

A properly finished deck should get a maintenance coat every two to three years to stay protected. We can set you up on a schedule so you do not have to think about it. We have been doing this for over 20 years, and every job is handled by our own crew with a written guarantee.