Is It Better to Paint or Stain a Deck? What the Data Sheets Say

For most decks that are still in good shape, stain is the better choice, and paint only makes sense when the boards are already cracked or splintering. The popular claim that paint protects a deck longer does not hold up against the manufacturers’ own data sheets: the stains state years of protection, the thick paint-style coatings state none, and a horizontal surface punishes any coating that forms a film. Below are the film thickness, coverage and warranty numbers that decide it.

Paint or Stain a Deck: The Short Answer

Think of it as a scale of how much film each product leaves on top of the wood, not as two camps. At one end, a semi-transparent stain soaks in and leaves almost no film. At the other, a resurfacer such as RockSolid 20X leaves 20 mils, which is 0.020 inch of dry coating. Everything in between is a trade: more film hides more damage, but a film is also the thing that peels.

Pick a penetrating or thin solid stain when the wood is sound. Pick a thick coating when cracks and splinters are the problem you are paying to hide. If you are already leaning toward the second option, our comparison of the best decking paints goes deep on the products. If you are leaning toward stain, see the best deck stain guide.

Deck Finishes Compared by Data Sheet

These figures come from the technical data sheets for one representative product per type: Behr Premium Semi-Transparent Waterproofing Stain and Sealer (rev. 7/19), Behr DeckPlus Solid Color (rev. 01/2020), Behr Advanced DeckOver Smooth (rev. 12/2018) and Rust-Oleum RockSolid 20X (rev. 060922). A mil is one thousandth of an inch. We have not tested any of these ourselves, so treat them as label specifications.

Finish type	Example product	Film and coverage	Recoat	Hides cracks?	Stated durability
Semi-transparent penetrating stain	Behr Premium Semi-Transparent	No film thickness given; 250-300 sq ft/gal first coat, 500-600 second	1-2 hours	No	6-year warranty horizontal, 8-year vertical
Thin solid stain	Behr DeckPlus Solid Color	2.0 mils + 1.0 mil dry; 200-400 sq ft/gal	1-2 hours	Hides imperfections, texture still shows	Up to 5 years on decks
Resurfacer paint	Behr Advanced DeckOver Smooth	5.4 mils per coat, 10.9 for two; 75 sq ft/gal	4-6 hours	Cracks and splinters up to 1/4 inch	None stated on the sheet
High-build resurfacer	Rust-Oleum RockSolid 20X	20 mils, one coat; up to 40 sq ft/gal	One coat (touch dry 4-6 hours)	Built for heavily worn decks	None stated on the sheet

The last two rows are the part most comparisons skip. The Behr DeckOver and RockSolid 20X sheets give film thickness and dry times but no number of years, while both stain sheets do. That does not mean the thick coatings fail sooner. It means the claim that paint outlasts stain has no manufacturer number behind it.

The Myth That Paint Protects a Deck Longer

Paint protects a vertical wall well because rain runs off it. A deck floor is different: it takes foot traffic, furniture legs, standing water and full sun. Behr itself prices that difference into its stain warranty, 8 years on vertical surfaces versus 6 years on horizontal ones for the same product. Horizontal boards are harder on any coating.

The most useful line in any of these data sheets is in the DeckPlus caution list: over-application “results in film forming on the wood surface and therefore subject to peeling and flaking.” The semi-transparent sheet says the same thing in different words: over-application of stain will lead to surface failure including peeling and cracking. In other words, a stain that peels was usually applied like paint. That is why both sheets stress thin coats, and why our guide to peeling deck paint starts with prep rather than product.

Which Finish Fits Your Deck

• New or lightly weathered, never sealed: semi-transparent stain. Behr recommends it for unsealed wood with 0 to 10 years of exposure. See our comparison of transparent and semi-transparent stain to choose the tint.
• Sound but faded or blotchy: thin solid stain such as DeckPlus. It hides imperfections and keeps the wood texture visible, at about 3 mils total.
• Gray boards with small cracks and splinters: a resurfacer such as DeckOver, which is designed to conceal cracks up to 1/4 inch. Behr says two coats are required.
• Badly worn boards: RockSolid 20X, at 20 mils in one coat, for decks where a thinner film would not cover the damage.

There is also a one-way door here. A penetrating stain is meant for unsealed wood, and the Behr data sheets call for stripping failing coatings and loose fibers before recoating. Once a deck carries a thick film, going back to a natural look means removing that film. Our guides to painting a treated deck and staining one cover the prep for each route.

What Each Route Costs in Cans for a 12 x 16 Deck

A 12 x 16 foot deck floor is 192 square feet before railings and stairs. Dividing by the data sheet coverage gives the number of gallons, and coverage drops sharply as film thickness rises:

Finish	Data sheet coverage	Calculated gallons for 192 sq ft
Semi-transparent stain, 2 coats	250-300 then 500-600 sq ft/gal	About 1.05 (192/275 plus 192/550), so buy 2 cans if the boards are thirsty
DeckPlus thin solid stain, 2 coats	300 then 600 sq ft/gal	About 0.96 (192/300 plus 192/600), so 1 gallon with little margin
DeckOver resurfacer, 2 coats	75 sq ft/gal for two coats	2.6, so 3 gallons
RockSolid 20X, 1 coat	Up to 40 sq ft/gal	4.8, so 5 gallons

Rust-Oleum notes actual coverage varies with wood type, age and porosity, and old dry boards drink more than the label suggests. At the $42.48 we saw for the KILZ stain gallon on Amazon, two cans would cover the deck with margin, while a resurfacer job needs three to five gallons plus cleaner or stripper. Price per gallon alone is a poor guide: what counts is the cost per deck.

Prep and Conditions That Matter More Than the Product

• Clean and dry first: Behr’s stain sheet says to let the wood dry at least 24 hours after cleaning and rinsing, and the surface must be completely dry before application.
• Watch the weather: Behr’s semi-transparent stain goes on between 35 and 90 F and resists rain after 4 hours, while DeckOver needs 50 to 90 F and no rain expected for 24 hours.
• Go easy with a pressure washer: the semi-transparent sheet says to use the broadest spray pattern and keep the nozzle at least 24 inches from the wood.
• Apply thin: use a pad applicator on large decks, work board lengths end to end to avoid lap marks, and back-brush after spraying.
• Lead paint warning: scraping or sanding old paint can release lead dust. Behr says to wear a NIOSH-approved respirator and clean up with a HEPA vacuum and a wet mop, and the EPA has guidance at epa.gov/lead.

If the deck already wears a failing finish, our notes on whether you can paint over stain on a deck and put solid stain over paint explain what to strip and what can stay.

Frequently Asked Questions

Does paint last longer than stain on a deck?

Not on the manufacturers’ own numbers. Behr’s data sheet for DeckPlus solid color stain says protection lasts up to 5 years on decks, and its semi-transparent stain carries a 6-year warranty on horizontal surfaces. The data sheets for the thick paint-style coatings (Behr DeckOver and Rust-Oleum RockSolid 20X) do not state a service life at all. These are manufacturer claims, not independent tests.

Which is better for a new pressure-treated deck, paint or stain?

A penetrating semi-transparent stain is the safer fit for new to moderately weathered, unsealed wood (Behr’s sheet says 0 to 10 years of exposure). If you want paint or a resurfacer instead, Rust-Oleum says new and sealed wood decks need to weather at least 6 months before RockSolid goes on, and Behr calls for a deck cleaner to remove mill glaze first.

Can I stain over a painted deck?

A penetrating stain needs bare, unsealed wood to soak into, so failing paint has to be stripped first. Behr’s data sheets call for a stripper on peeling paint or stain, followed by a deck cleaner to neutralize the wood. If the paint is sound and you only want a fresh color, a solid stain over paint is a different job, covered in our guide linked above.

Which finish hides cracks and splinters?

Only the thick coatings. Behr says Advanced DeckOver is designed to conceal splinters and cracks up to 1/4 inch. Semi-transparent stain leaves almost no film, so cracks stay visible and splinters stay sharp.

Is a painted or stained deck slippery when wet?

Both can be. Behr’s stain data sheets say stained surfaces may become slippery when wet, and its DeckOver sheet says even the textured, slip-resistant finish may still be slippery when wet. Sweep off algae and leaves, because wet organic growth is slippery whatever the finish.

Bottom Line

Stain a sound deck, and keep the coats thin so it does not turn into a film. Reach for paint or a resurfacer only when cracks and splinters are what you need to hide, and go in knowing the paint-style data sheets promise no service life. Check your boards against the table, then use the gallon table to price the job before you shop.