For most wood decks, stain is the better choice. It soaks into the wood, wears away gradually instead of peeling, and can be recoated after a cleaning. Paint gives you total colour control and strong UV protection, but on a surface you walk on, through freeze-thaw winters, it tends to chip and peel. Then it has to be scraped and sanded. Below, we explain the difference, compare the finishes, and show how to prepare an older deck.
TL;DR
- Stain suits most deck floors. The Canadian Wood Council notes that paints and other thick films may fail quickly under foot traffic and weather.
- Paint hides the grain completely and offers excellent UV protection. It forms a film that can peel, and removing it is a lot of work.
- A solid-colour stain gives you an opaque, painted look with less peeling risk. It still hides the grain.
- Prep decides how long any finish lasts. A clean, dry, sanded surface matters more than the brand on the can.
- Stain can go over old stain if it is not flaking. Over paint, the old coating generally has to come off first.
Table of Contents
- How deck stain and deck paint differ
- Appearance: what each finish does to your deck
- Protection and durability in Canadian weather
- Which finish for which part of the deck
- Can you put stain over paint?
- Preparing an older deck for either finish
- Our perspective
- When it is time to rebuild instead of refinish
- FAQ
- Sources
How deck stain and deck paint differ
The core difference is where the product sits. Cabot explains that paint coats the top of the wood while stain penetrates it. That one fact explains most of what follows.
Paint forms a film. HGTV describes it as a protective layer that gives excellent UV protection, with no wood grain showing through. You can choose almost any colour.
Stain comes in several opacities, from clear to solid. It repels water and gives UV protection that rises with the amount of pigment. Because it is absorbed rather than layered on top, it fades gradually. This Old House says stain doesn’t peel or scratch as easily as paint and is easier to maintain and reapply. It also says paint can be slippery when wet. That matters on steps and landings.
The four stain levels
| Finish | Grain visible | Protection | Typical behaviour |
|---|---|---|---|
| Clear or transparent | Fully | Least UV protection | Fades, needs frequent refreshing |
| Semi-transparent | Mostly | Moderate UV protection | Ages by fading, not peeling |
| Semi-solid | Slightly | Better UV protection | Longer between coats |
| Solid colour | Not at all | Best UV and weather protection | Behaves closest to paint |
This Old House describes semi-transparent stain as about 25% pigment, with the grain visible. It describes solid stain as hiding the grain completely and offering the best UV and weather protection. The rule of thumb from Cabot is that the more opaque a stain is, the more durable it is, and the less of the grain you see.
Appearance: what each finish does to your deck
If you want to see the wood, choose a clear, semi-transparent or semi-solid stain. The wood still shows through. Bob Vila notes that the species and colour of the wood affect the result with these stains. The reds in cedar show through, and the yellows in pressure-treated pine brighten the tone.
If you want a uniform colour, such as grey, charcoal or a bold shade, paint or solid stain gives you that. The same source says species and wood colour have no bearing on a solid stain’s end result. That makes solid products useful on mixed boards, patched sections or an older deck that has weathered unevenly.
Unprotected pressure-treated lumber does not stay the colour it came. According to HiLine Treated, its warm brown fades to tan or beige and then gradually turns grey. How fast depends on sun exposure, species and application.
Protection and durability in Canadian weather
Paint protects well against UV and moisture on paper. The problem on a deck is the horizontal surface. Water sits, boards swell and shrink, and people walk on it. A UBC researcher writing for the Canadian Wood Preservation Association notes that paints screen wood from sunlight and block surface wetting. But their tendency to trap water and encourage decay has led to more use of penetrating water-repellent stains for outdoor wood.
Sherwin-Williams says paint can last longer in optimal conditions, but it is more susceptible to chips and scratches. It also says paint traps moisture, which can lead to wood damage, while stain lets moisture escape. Ottawa winters add repeated freezing and thawing, so a rigid film on boards that move is under stress all season.
How long each finish lasts
Quoted lifespans vary a lot, because exposure, wood species and prep all change the result:
- Stain on a deck: Bob Vila gives a range of one to eight years. Sherwin-Williams says two to eight in optimal conditions. The Canadian Wood Preservation Association paper puts stain protection at two to five years.
- Solid stain and paint: the TDCA says solid stains can last up to five years but need sanding or stripping when it is time to redo them. Translucent stains should be refreshed every two to three years.
- Guarantees versus reality: CBC News reported that Edmonton painters said deck stain can last three to four years, but only if the wood is properly prepared and the stain is applied at the right time.
The pattern is consistent. Paint may last longer when it works, and it fails harder when it doesn’t. Stain asks for more frequent attention, but the attention is easier.
Recoating: the part people forget
With stain, maintenance means cleaning and applying another coat. With paint, failure means scraping, sanding and sometimes chemical stripping. The Canadian Wood Council points out that a failed film on a wear surface means a time-consuming refinishing process each time. Deck Stain Help makes the same point from the homeowner’s side: paint on deck floors eventually peels and has to be scraped and sanded.
Which finish for which part of the deck
You do not have to use one product everywhere.
- Deck floor and stairs: stain, ideally semi-transparent or semi-solid. If you want an opaque look, a solid-colour stain is the closer match to paint with less peeling.
- Railings, posts and skirting: these are vertical and see no foot traffic. Paint is less of a problem here. Deck Stain Help says paint makes sense on vertical surfaces, for a bright colour stains don’t offer, or to hide badly weathered wood completely.
- Cedar: the Canadian Wood Council says coatings, especially solid stains and paints, last longer on dimensionally stable species such as cedar because they shrink and swell less. It also says deck stains will not last as long on low-density species like western red cedar due to wear. For more on the wood itself, see our guide to cedar vs pressure-treated for Canadian decks.
- Pressure-treated pine: the most common Ontario deck wood. A semi-transparent stain is a popular tier for softwood decks, and a solid stain is the route for a uniform colour.
Can you put stain over paint?
Usually not, and this is the question that catches people who inherited a painted deck.
Stain needs bare wood to soak into. Benjamin Moore’s data sheet, as reported by DV Groupe, says stain can go over a worn transparent or semi-transparent finish if it isn’t flaking or peeling. On a painted surface it can only be applied once the old coating is completely removed.
Dulux Canada says a sound existing coating need not be removed. If it is peeling excessively, or has been treated with a waterproof product containing wax, strip it. Semi-transparent stains go only over existing semi-transparent stains or properly prepared bare wood.
The practical rule: if the old paint is sound, a solid-colour stain or another paint is the realistic option. If you want to see the wood again, plan to strip it fully.
A safety note for older Ottawa homes
If your house is old and the deck, railings or trim carry many layers of old paint, do not sand or scrape them dry until you know what is in them. Older paint can contain lead. Our guides to exterior lead paint removal in Ottawa and lead abatement versus renovation explain when to test first and who should handle the work.
Preparing an older deck for either finish
The finish matters less than the prep. Beaver Wood Restoration’s Maddy Sheladiya, in a Toronto-area article, calls prep quality the biggest controllable factor in how long stain lasts. Most short-lived jobs, she says, are prep failures, not product failures. Here is a working sequence drawn from the manufacturers and wood bodies:
- Inspect first. Bob Vila is blunt that if the decking is structurally compromised, no stain or paint will solve it. Replace soft or rotted boards and tighten fasteners.
- Remove the old finish where it is failing. Older decks with peeling stain or flaking paint need more aggressive prep, including scraping and sometimes chemical stripping followed by neutralizing and rinsing, according to Deck Doc.
- Clean. Sherwin-Williams wants the surface free of dust, dirt, wood fibres and grease, dry, and free of mildew. Sweep thoroughly first.
- Go easy with the pressure washer. Bob Vila advises staying under 600 psi on softwoods like cedar and 1,500 psi on hardwoods like oak.
- Sand lightly. The Canadian Wood Council says a light sanding with 100-grit paper and dust removal can double the service life of some water-based coatings.
- Check the weather. Sherwin-Williams suggests no rain for 24 to 48 hours. Protect nearby plants and siding with thin plastic, and stain railings before the main deck.
Timing also matters on new wood. The Canadian Wood Council says fresh wood left exposed to rain and sun for more than two weeks will not hold a coating as well. It also reports that boards weathered for 16 weeks before painting showed cracks in about three years, while unweathered boards lasted at least 20.
For wear surfaces, the Council also advises consulting the coating manufacturer on the right product. Foot traffic and horizontal exposure challenge every coating, and high-traffic routes wear first.
Our perspective
We build and replace decks around Ottawa, and the decks that give people trouble are rarely the ones with the “wrong” finish. They are the ones where the boards were never sound, or where the finish went over dirt, moisture or old paint that was already letting go.
Our advice is simple. Start with good structure and good lumber. Choose a penetrating stain for the floor and stairs, and keep paint for vertical parts if you want a specific colour. Then keep a schedule. A short inspection each spring and fall catches a lifting board or a worn path before it becomes a rebuild. Our deck maintenance schedule for Ottawa homeowners lays that out.
Sometimes a stripped, patched and re-stained deck is the sensible answer. Sometimes the framing or boards are at the end of their life, and a new deck is the better investment. If you are comparing materials for that rebuild, our composite vs wood decking breakdown shows how the long-term costs compare. Either way, we give you an itemized, line-by-line quote so you can see what you are paying for.
Jason
When it is time to rebuild instead of refinish
Sometimes refinishing is no longer the right question. If boards are soft, joists are damaged, or there are many layers of failed paint, new decking can cost less than a long prep job on a deck that will keep failing. That decision is also a chance to choose the material and the finish plan together.
We install custom decks and fences across the Ottawa area. Our published pricing for a pressure-treated deck is 45-75 CAD per sq ft, and for fences it is 30-60 CAD per linear ft for pressure-treated and 60-100 CAD per linear ft for cedar. A new build in Ontario also raises the permit question, which we cover in do you need a deck permit in Ottawa.
If your deck needs more than a new coat, see our decking and fencing services. We offer free estimates, and our estimates typically arrive within 24 hours.
We also handle demolition and debris hauling, so an old deck can come out and leave with the same crew.
FAQ
Is deck stain or paint better?
For most wood decks, stain is better. It soaks in, wears gradually and recoats after cleaning. Paint hides the grain and protects against UV, but it forms a film that peels on walking surfaces and has to be scraped and sanded. Paint is better kept for railings, skirting and other vertical surfaces.
What is a solid colour stain?
It is an opaque stain that covers the wood grain completely. Consumer Reports says it is applied like paint and offers more protection than semi-transparent stain. It gives a painted look with less peeling risk than paint, though it still hides the grain and needs sanding or stripping before a redo.
Do I need to stain my deck at all?
Bare pressure-treated wood will weather, fading to tan and then grey, as HiLine Treated describes. A finish with water repellency and UV protection slows that. Which one you choose depends on whether you want to keep the wood’s look or change it.
Can I use deck stain over paint?
Generally no. Dulux Canada says sound coatings need not be removed, but semi-transparent stains only go over existing semi-transparent stain or bare wood. To get a natural wood look back, strip the paint completely first. Test old paint for lead before sanding on an older home.
How often does a deck need recoating?
It depends on the finish and exposure. Semi-transparent stain often needs a maintenance coat every two to three years on a deck floor, according to Beaver Wood Restoration. Solid products can last longer between coats but are harder to redo. Inspect twice a year and recoat when water stops beading.
Sources
- Canadian Wood Council: Choosing and Applying Exterior Wood Coatings
- Canadian Wood Council: Performance Factors
- Canadian Wood Preservation Association: Weathering of Wood
- Cabot: Why Stain
- HGTV: Wooden Deck Maintenance
- This Old House: How Deck Stain Protects Wood
- Bob Vila: The Best Solid Deck Stains
- Bob Vila: Painting vs Staining a Deck
- Sherwin-Williams: When to Stain vs. Paint Wood
- Sherwin-Williams: How to Prep and Stain an Old Deck
- TDCA: How to Keep a Timber Deck
- CBC News: Deck stain guarantees
- Dulux Canada: Preparing Exterior Wood for Staining
- Consumer Reports: How to Stain a Deck
- HiLine Treated: Pressure Treated Wood
- Deck Stain Help: Deck Stain vs. Paint
- DV Groupe: Stain or paint for a wood deck?
- Deck Doc: Best Way to Apply Deck Stain
- Beaver Wood Restoration: How Long Does Deck Stain Last in Canada?