The stain vs paint decision costs homeowners more money than almost any other choice they make about the outside of a house, and it usually gets made with bad information. The paint store sells what is on the shelf, and the neighbor recommends what worked on his house, which has different siding and different wood. Four years later a deck starts flaking, and the recoat costs more than the original job would have with the right product on it.
With over 30 years of experience and more than 200 completed projects across Beaverton, Tigard, Lincoln City, and the Portland Metro area, Mark Powers Painting Inc. has put both finishes on nearly every surface a house has.
What Stain vs Paint Actually Does to Wood
Paint cures into a continuous film across the surface. That film blocks moisture and sunlight and carries the color, and because it bridges the grain rather than entering it, the texture of the wood disappears underneath.
A true penetrating stain carries pigment down into the wood fibers and forms no film. Grain stays visible, and the surface still reads as wood.
According to the USDA Forest Products Laboratory, penetrating stains cannot blister or peel even when excessive moisture enters the wood, because they never form a layer that moisture can push off. A paint film can do both, and eventually it will. The trade runs the other way too, since a film protects longer and holds color better where water runs off it, while a stain thins and fades and asks to be renewed sooner.
The Word “Stain” Hides Three Different Products
This is where most homeowners go wrong, and it is not their fault. Three genuinely different products are sold as stain, and only one of them penetrates.
- Solventborne oil-based semitransparent stain. The real thing, and the finish of choice for wood fully exposed to the weather. The solvent carries pigment into the fiber and evaporates out.
- Latex semitransparent stain. It looks nearly identical in the can, but the polymer does not enter the wood. The semitransparent look comes from a film too thin to be durable, so it degrades by flaking away.
- Opaque or solid-color stain, in latex or oil. A film-forming finish that happens to be sold as stain. It is applied like paint and it behaves like paint.
So when someone tells you that stain cannot peel, they are describing exactly one of those three. Ask what the base is before you ask what the color is.
How Long Stain vs Paint Actually Lasts on Each Surface
Service life is the number that should settle the argument, and it has been measured, though almost nobody passes it along to homeowners.
- Semitransparent stain, one coat on smooth planed wood. Two to three years.
- The same stain on the same wood after it has weathered. Eight to ten years.
- Two coats on roughsawn or weathered wood. Ten years or more.
- Solid-color stain, two coats on rough wood. Eight to ten years.
- Solid-color stain, two coats on smooth wood. Four to five years.
One line in that list surprises almost everyone. The same stain on the same house lasts two to three years the first time and eight to ten the second. Smooth new wood is nearly closed to a penetrating finish, while weathered wood has opened up, so it drinks the stain and holds onto it.
The coverage rates say the same thing. Smooth wood takes 200 to 400 square feet from a gallon, while rough or weathered wood takes 100 to 200, and that extra finish is not waste. It ended up inside the board.
Stain vs Paint on a Deck
A deck absorbs standing water, direct summer sun, foot traffic, and furniture dragged across it, all on a flat plane where nothing drains.
Paint on a deck looks excellent for a season or two. Then water finds a nail hole or an exposed board end, works beneath the film, and pushes it up from below. Once one section lifts the rest follows, and recoating means stripping whatever remains.
Here is the part that surprises people who have already been to the paint store. Solid-color stain is not the safe alternative. Opaque stains perform well on siding, but they should not be used on structures such as decks and fences, because a solid stain is a film and on a deck it does what films do.
The right finish for a deck is a penetrating oil-based semitransparent stain. It fades rather than lifts, and a faded deck gets cleaned and recoated without stripping anything, which is maintenance rather than restoration. Watch the board ends in particular, because cut ends are open fiber and draw water far faster than the face of a board. That is why deck failures begin at the ends and at the stairs.
Stain vs Paint on Siding
Siding is vertical, and the arithmetic changes completely. Sunlight rather than standing water is what destroys a wall, and a film is the better defense against sunlight.
So on siding, paint generally outlasts stain, which is why most homes around here have it. Solid-color stain works here too, and it is the one place it belongs, though it will not hide a patched board the way paint does. The real exception is cedar, common on older houses across Beaverton and Tigard. If you have cedar siding and you want to keep seeing the wood, stain preserves the character that paint erases.
What Wood Species Changes About the Decision
Species is not a footnote, because it changes which product belongs on the wall.
- Cedar and redwood. Their decay resistance lives in the heartwood, so boards carrying a lot of sapwood do not have it whatever the species stamp says. Those same extractives bleed through light-colored finishes as brown discoloration, which is why bare cedar wants an oil-based primer under paint and a pigmented finish rather than a clear one under stain.
- Douglas fir. It sits under a great many Portland houses and it is a difficult stain substrate. Smooth surfaces of high-density species like this one should be treated with a water-repellent preservative and left to weather for a year before staining, so the first coat penetrates uniformly.
How to Tell What Is Already on Your Wood
Before you choose anything, walk to a worn spot near the deck stairs, a doorway, or the sunny wall.
- Flaking with hard edges. If chips lift and you can catch a fingernail under them, you have a film, which means paint, solid stain, or a latex semitransparent stain.
- Pale and thin, faded down into the grain. A penetrating stain wearing away, and the easy case.
- Chalky powder on a dark cloth. The film has aged but has not failed, and it can usually be washed, spot-primed, and recoated.
- Gray, fuzzy, and soft under a thumb. The finish is gone and the fibers have broken down, so that wood needs cleaning and sanding first.
Press masking tape firmly onto a suspect area and pull it away. Whatever lifts would have come off under a new coat, and that tells you how much of your quote is preparation.
Can You Stain Over Paint, or Paint Over Stain?
You can paint over stain. It takes cleaning, sanding to break the surface, and a bonding primer chosen for what is underneath. That is exactly how the dark stained trim and cabinets in so many older homes here get lightened, and you can see how we handle painting stained trim and cabinets without replacing them.
You cannot stain over paint. Penetrating stains cannot go onto wood previously finished with a film-forming product unless that product is completely removed, because stain needs open fiber to enter and a film has sealed all of it. Anything marketed as a stain that goes over paint is a thin tinted coating sitting on the surface, and it will fail the way films fail. So the traffic runs one direction, and reversing it means taking the wood back to bare.
Three Questions Worth Asking Any Painter
Two crews can apply the same product from the same can and produce results five years apart, so the stain vs paint decision is only half of it.
- Will you brush the stain, or spray it? Sprayed stain that is not immediately brushed in sits on the surface instead of entering the wood, and surface stain wears off within a season.
- How many coats, and what happens to the excess? On smooth wood a second coat may not penetrate at all, and excess stain left sitting for an hour dries into glossy patches.
- What is your gallon estimate, and how did you reach it? A contractor who quotes the same coverage for smooth siding and rough siding has not looked closely at your siding.
What Portland’s Climate Decides for You
Wood only develops serious finish problems once its moisture content reaches the fiber saturation point, and it almost always gets there through liquid water rather than humidity. Nine months of drizzle will not soak a wall to that level, while a puddle sitting on a deck board for an afternoon will.
Temperature draws a harder line than most homeowners expect. Latex finishes generally need at least 50°F for several hours after application in order to coalesce properly, while oil-based finishes can be applied at around 40°F. In a Portland spring, that gap can be the whole week. Our guide on when to paint the exterior of your home covers the seasonal window in more depth.
Shade compounds all of it. Homes under heavy tree cover in Laurelhurst, Eastmoreland, and Sellwood hold moisture on the north side long after the south side has dried.
What We Look At When We Walk Your House
An estimate is a diagnosis rather than a measurement, and most of it happens in the first ten minutes.
We start on the south and west walls, because those fade and fail first, then the north wall, because that is where mildew lives. We press a thumb into the trim at the sills and at the bottom of door casings, since soft wood there means water has been sitting and no finish will correct it. On a deck we look at the board ends and the stair treads before the open field. And we check whether the existing finish flakes or fades, because that single observation decides whether your project is a wash and recoat or a scrape and prime, which is the largest variable in what you will pay.
Then we tell you how the stain vs paint question resolves on your house, and sometimes the answer is to let new siding weather for a year first. That does not win us the job this summer, but it is what gets your finish to last a decade. You can see how we prep an exterior before any finish goes on it.
Frequently Asked Questions
Does stain protect wood from rot?
Not by itself. Stain slows how quickly wood takes on water, and drier wood is less hospitable to the fungi that cause decay, but stain is a surface treatment rather than a preservative. Wood in ground contact needs pressure-treated lumber, not a better finish, and drainage and flashing do more for rot resistance than anything applied on top.
Is stain cheaper than paint?
Per gallon it usually is, and across the life of the house it usually is not. Stain asks to be renewed on a shorter cycle than paint does on the same vertical surface, so you are buying a smaller job more often rather than a larger job less often. The arithmetic tips toward stain only where a paint film would have failed early anyway, which is to say on anything horizontal.
Will a solid stain look like paint?
From the sidewalk, close enough that most people cannot tell. Up close it sits flatter and shows more of the wood beneath, because solid stain lacks the hiding power of true paint. A dark previous color will ghost through it, and a second coat does not correct that the way a second coat of paint would.
Do I have to strip the old finish before recoating?
Almost never all of it. A crew removes what is failing, leaves what is sound, and feathers the edges so the transition does not telegraph through the new coat. Whole-house stripping is reserved for lead abatement, historic work, or a finish that failed everywhere at once. Anyone proposing to strip a sound wall is either padding the quote or has found something they have not shown you.
Does the same logic apply to fiber cement siding?
Only partly. Fiber cement takes paint well and cannot be stained, because there is no fiber to hold pigment. Stain vs paint is a question that really belongs to wood.
Get the Right Finish on the Right Surface
Grain condition, exposure, species, and whatever went on last time all move the answer, and none of them are visible in a photograph.
We have finished wood on homes throughout Beaverton, Tigard, Lincoln City, and the Portland Metro area, and we will walk your siding, deck, or trim with you and tell you plainly what we would put on it and why.
Ready to find out which finish your home needs? Call (503) 624-1598 or request a free quote to book your free in-home estimate. You can also contact our Portland team directly to schedule a no-obligation consultation.