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Inspecting a suspected wood rot spot on a Vancouver home. Wood Rot Repair Vancouver, BC. Stop the rot co.

IS IT WOOD ROT? - Not Everything That Looks Like Rot Is Rot.

A soft spot, a dark stain, a musty smell, here's how to actually tell what you're looking at, before you call anyone.
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Is it wood rot?

What to know about wood rot

Wood rot is fungal decay, not simple aging, and it needs the same three things to establish itself anywhere on your home: wood, oxygen, and sustained moisture, remove any one of those and decay can't take hold. Since the first two are unavoidable in normal construction, moisture is the variable that actually determines whether a piece of wood stays sound or starts breaking down. In Vancouver specifically, that moisture usually comes from one of a handful of repeat offenders: a failed caulking joint at a window, door, or siding seam, a clogged or overflowing gutter directing water onto fascia or siding it was never meant to touch, poor grading that slopes water toward the house instead of away from it, a missing or damaged rain screen gap that traps moisture directly against a wall assembly, or condensation building up in an unventilated space like an attic or crawl space. None of these causes are exotic, they're ordinary maintenance gaps that compound quietly for years before the wood itself starts to visibly fail.

Wood rot gives itself away in three different ways, and checking all three catches more than relying on any one alone. Visually: discoloration that's darker, grayer, or has a bleached look compared to surrounding healthy wood, a cube-like cracking pattern across the grain, paint that's bubbling or peeling in one specific spot rather than evenly, and any visible softness or crumbling at joints, corners, or where wood meets another material. Physically: the Poke Test is the single most reliable check, press a flathead screwdriver firmly into the suspect wood. Solid wood resists. Decayed wood gives way easily, often sinking a quarter inch or more with barely any pressure. Tapping the wood and listening for a dull, hollow sound compared to a sharper sound elsewhere on the same piece is a useful second check. By smell: a persistent musty, earthy odor near an exterior wall, window, or crawl space, especially one that's stronger after rain, often means active decay is already underway even before any visual sign is obvious from the outside.

Rot doesn't stay small, and it doesn't pause because addressing it isn't convenient right now. It's an active, living fungus that keeps consuming wood as long as moisture is present, and it can go dormant during a dry spell and reactivate the moment the same spot gets wet again, meaning a finding you decide to "keep an eye on" doesn't actually stop progressing just because you're watching it. The good news is that an early, contained finding is almost always the cheapest and simplest stage to address, usually a straightforward epoxy consolidation rather than a full replacement. The only way to know which stage you're actually at, rather than guessing from the outside, is a documented moisture-meter reading at the specific location, which is exactly what a free 20-point inspection gives you before any repair decision gets made.

Watch: Is It Wood Rot?

Short videos that show real rotten wood and what to look for.

  • How Can You Tell If You Have Wood Rot?

    What the video covers

    How can you tell if you have wood rot? Start by looking for the source of water. Most of the time it is gutters, where water gets in underneath, or a place where water can sit for a long time. If you are not sure what to look for, start with wood that already looks damaged. Then press on it with your finger or a screwdriver wherever something looks wrong. Soft wood lets the screwdriver sink in. Solid, healthy wood does not.

  • Healthy Wood vs Rotten Wood: What's the Difference?

    What the video covers

    What is the difference between healthy wood and wood damaged by rot? Here are three boards, and one of them is rotten. See how easily the rotten board crumbles and how it looks. Rotten wood also has a specific smell, the smell of wood that has already given up.

  • What Is Wood Rot? Dry Rot and Wet Rot Explained

    What the video covers

    What is wood rot, and what does it look like? Wood rot is damage that happens when wood gets soaked and a specific fungus starts to eat it. From the outside, a board can still look good. Turn it over and you can see there is no solid wood left. Rot in structural parts such as posts, stairs and decks is hazardous, because the wood can give way under your weight and you can get hurt. It is better to look after your wood and catch rot before it becomes serious.

Real Rot We're Finding Around Vancouver

84% of homeowners believe that they don't have wood rot before the inspection

Stairs wood rot found during a free inspection in Greektown, Vancouver. Stop the Rot Co.
Stairs, Greektown
Stairs wood rot found during a free inspection in Kitsilano, Vancouver. Stop the Rot Co.
Stairs, Kitsilano
Rafter Tail wood rot found during a free inspection in Kitsilano, Vancouver. Stop the Rot Co.
Rafter Tail, Kitsilano
Side Casing wood rot found during a free inspection in Kitsilano, Vancouver. Stop the Rot Co.
Side Casing, Kitsilano
Stairs wood rot found during a free inspection in Kitsilano, Vancouver. Stop the Rot Co.
Stairs, Kitsilano
Fascia wood rot found during a free inspection in North Vancouver, Vancouver. Stop the Rot Co.
Fascia, North Vancouver
Window Sill & Frame wood rot found during a free inspection in North Vancouver, Vancouver. Stop the Rot Co.
Window Sill & Frame, North Vancouver
Fascia wood rot found during a free inspection in Point Grey, Vancouver. Stop the Rot Co.
Fascia, Point Grey
Stairs wood rot found during a free inspection in Point Grey, Vancouver. Stop the Rot Co.
Stairs, Point Grey
Window Trim wood rot found during a free inspection in Point Grey, Vancouver. Stop the Rot Co.
Window Trim, Point Grey
Post & Railing wood rot found during a free inspection in Vancouver, Vancouver. Stop the Rot Co.
Post & Railing, Vancouver
Stair Post wood rot found during a free inspection in Vancouver, Vancouver. Stop the Rot Co.
Stair Post, Vancouver

If it's in your neighbourhood, there's a good chance it's on your home too, and most of it doesn't show until it's already spread.

It's a fungus that starts hidden. By the time it's visible, it has usually already spread further than it looks. Rot can stay dormant for months or years in dried wood, then reactivate the moment it gets wet again.

WOOD ROT DOESN'T STAY SMALL

It doesn't take a flood, just sustained dampness. Wood is considered low risk before ~19-20% moisture. Past that, decay risk rises, and sustained levels above ~28-30% are enough to actively break the wood down fast.
Vancouver's climate is exactly what it wants. Wet, mild, and humid for most of the year - conditions that keep wood moisture elevated for months at a time
It doesn't pause because you're busy. Once active and left undisturbed, it keeps feeding on the wood - quietly, behind paint, siding, or trim.

OFTEN CONFUSED WITH

Rot or Mold? Mold grows on the surface without consuming the wood underneath, mainly an air-quality issue, not a structural one. The Poke Test tells you which one you're actually looking at.
Rot or Termites? Rot shows uniform decay with no internal pattern. Termite damage shows hollow galleries following the grain, often packed with mud.
Rot or Just Peeling Paint? UV and temperature swings can make healthy wood look decayed from a few feet away. If the wood resists the screwdriver, it's a maintenance item, not a repair.

HOW TO TELL

  1. 1

    What You'll See

    Dark, uneven discoloration, or in less common cases, pale bleached wood. A cube-like cracking pattern as it dries. Paint or caulk failing with no obvious cause. Fine white, gray, or black growth in advanced cases.

  2. 2

    What You'll Feel

    The Poke Test: a screwdriver sinks in easily, often a quarter inch or more. A floor or railing that's gone bouncy or spongy points to the same thing underneath.

  3. 3

    What You'll Smell

    A musty, earthy odor as the fungus digests the wood, often noticeable before anything is visible at all.

  4. 4

    Not Sure?

    Peeling paint can look like decay on perfectly sound wood. Book our free 20-point inspection.

Selected work completed by
members of our carpentry team

Fascia. Wood Rot Repair Vancouver, BC. Stop the rot co.
Selected work completed by members of our carpentry team.
Fascia
Stairs. Wood Rot Repair Vancouver, BC. Stop the rot co.
Selected work completed by members of our carpentry team.
Stairs
Posts. Wood Rot Repair Vancouver, BC. Stop the rot co.
Selected work completed by members of our carpentry team.
Posts
Window Sill & Molding. Wood Rot Repair Vancouver, BC. Stop the rot co.
Selected work completed by members of our carpentry team.
Window Sill & Molding
Cedar Siding. Wood Rot Repair Vancouver, BC. Stop the rot co.
Selected work completed by members of our carpentry team.
Cedar Siding
Post Caps. Wood Rot Repair Vancouver, BC. Stop the rot co.
Selected work completed by members of our carpentry team.
Post Caps
Porch. Wood Rot Repair Vancouver, BC. Stop the rot co.
Selected work completed by members of our carpentry team.
Porch
Deck. Wood Rot Repair Vancouver, BC. Stop the rot co.
Selected work completed by members of our carpentry team.
Deck
Siding. Wood Rot Repair Vancouver, BC. Stop the rot co.
Selected work completed by members of our carpentry team.
Siding
Siding. Wood Rot Repair Vancouver, BC. Stop the rot co.
Selected work completed by members of our carpentry team.
Siding
Siding. Wood Rot Repair Vancouver, BC. Stop the rot co.
Selected work completed by members of our carpentry team.
Siding
Deck. Wood Rot Repair Vancouver, BC. Stop the rot co.
Selected work completed by members of our carpentry team.
Deck

Selected work completed by members of our carpentry team.

Free resources to help you know what you're looking at.

Understand Wood Rot Before You Call Anyone.

Tools & Guides Section
How to Stop Wood Rot From Spreading. Wood Rot Repair Vancouver, BC. Stop the rot co.
DIAGNOSTIC · Nov 13, 2026

How to Stop Wood Rot From Spreading

How to stop wood rot from spreading: what actually halts fungal activity, immediate steps to take, and the one thing that doesn't count as a fix.

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Epoxy vs. Borate: Two Different Wood Rot Treatment Methods. Wood Rot Repair Vancouver, BC. Stop the rot co.
COMPARISON · Nov 11, 2026

Epoxy vs. Borate: Two Different Wood Rot Treatment Methods

Epoxy vs. borate wood rot treatment: why they solve different problems, and why they're often used together rather than as alternatives.

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Treated Lumber vs. Untreated Wood for Rot Prevention. Wood Rot Repair Vancouver, BC. Stop the rot co.
COMPARISON · Nov 9, 2026

Treated Lumber vs. Untreated Wood for Rot Prevention

Treated lumber vs. untreated wood for rot prevention: how Canada's CSA O80 standard rates lumber, and why "treated" alone isn't the full answer.

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Wood Filler vs. Wood Replacement: When a Patch Isn't Enough. Wood Rot Repair Vancouver, BC. Stop the rot co.
COMPARISON · Nov 7, 2026

Wood Filler vs. Wood Replacement: When a Patch Isn't Enough

Wood filler vs. wood replacement for rot: why a basic filler patch over decayed wood usually fails, and how to tell if that's what you have.

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Wood Rot vs. Water Damage: How to Tell Them Apart. Wood Rot Repair Vancouver, BC. Stop the rot co.
COMPARISON · Nov 5, 2026

Wood Rot vs. Water Damage: How to Tell Them Apart

Wood rot vs. water damage: why they're not the same thing, and how the timing of water exposure determines which one you're actually dealing with.

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Pressure-Treated Lumber Ratings Explained (Canadian Standards). Wood Rot Repair Vancouver, BC. Stop the rot co.
TECHNICAL · Nov 3, 2026

Pressure-Treated Lumber Ratings Explained (Canadian Standards)

Pressure-treated lumber ratings explained under Canada's CSA O80 standard, from dry interior use through severe saltwater exposure.

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Best Wood Preservative for Exterior Trim in Vancouver's Climate. Wood Rot Repair Vancouver, BC. Stop the rot co.
TECHNICAL · Nov 1, 2026

Best Wood Preservative for Exterior Trim in Vancouver's Climate

Best wood preservative for exterior trim in Vancouver's climate: real trade-offs between paint, stain, and penetrating preservatives.

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Deck Post Rot Repair: How to Spot and Fix Rotten Deck Posts. Wood Rot Repair Vancouver, BC. Stop the rot co.
Wood Rot Guides · Oct 31, 2026

Deck Post Rot Repair: How to Spot and Fix Rotten Deck Posts

How to tell if a deck post is rotten, why the base rots first, when a post can be repaired and when it must be replaced, and what to do before it is unsafe.

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Rotten Fascia: Call a Wood Rot Specialist or a Gutter Company?. Wood Rot Repair Vancouver, BC. Stop the rot co.
Wood Rot Guides · Oct 31, 2026

Rotten Fascia: Call a Wood Rot Specialist or a Gutter Company?

Rotten fascia in Vancouver: should you call a gutter company or a wood rot specialist? What each one does, what to ask, and what a proper repair costs.

Read
Good to know

Questions we hear a lot.

Wood rot is fungal decay, not simple aging. A fungus feeds on the cellulose in wood, and it needs sustained moisture to establish itself and keep growing. It starts wherever water reaches wood repeatedly without drying out, a failed seal, a clogged gutter, a grading issue, anything that keeps a piece of wood consistently damp long enough for decay to take hold.

The most reliable check is the Poke Test: press a flathead screwdriver into the wood. Solid wood resists. Decayed wood gives way easily, often sinking a quarter inch or more. Look for discoloration, a cube-like cracking pattern, or a musty smell, especially at windowsills, deck boards, and siding near ground level.

Wood rot and mold often show up together but aren't the same thing. Mold grows on the surface and is mainly an air-quality concern. Wood rot consumes the wood itself and compromises its structural integrity.

It depends entirely on the extent, which isn't something you can judge by eye. A documented moisture-meter reading tells you whether the affected wood is repairable with an epoxy consolidant or needs replacing. Early findings are almost always repairable. The only way to know for certain is an actual reading, not a guess.

Vancouver's roughly six-month wet season, mild temperatures that don't freeze decay dormant the way colder climates do, and, in many neighbourhoods, mature tree canopy that keeps siding and trim shaded and slow to dry, combine to make this a persistent issue here in a way it isn't everywhere in Canada.

It depends on how far the decay has progressed, and that's decided by a moisture-meter reading, not a visual guess. If sound wood remains, epoxy consolidation restores structural integrity. If decay has compromised the wood beyond that point, replacement is the honest answer. We tell you which one applies to your specific finding, in writing.

No. Painting over active rot traps moisture in rather than letting it escape, and it hides the wood's condition from view, making it harder to track whether the problem is getting worse. It's a common, well-intentioned mistake, not a fix.

Moisture control is the only thing that actually halts fungal activity. While arranging a proper repair, address any active leak source immediately, improve airflow to the area, and keep it as dry as possible. This buys time, it doesn't replace finding and fixing the actual cause.

Windowsills, brickmold, deck boards and ledgers, siding near ground level, fascia and soffits, and door thresholds, anywhere wood sits in repeated contact with water without a clear way to dry out.

Rot doesn't stay small. It's an active, living fungus that keeps consuming wood as long as moisture is present, and it can even go dormant when dry and reactivate once it's wet again. A small, contained finding today is the cheapest and simplest stage to address it.

A full 20-point check covering the most common failure points on a property, an actual moisture-meter reading at each relevant location, and a written report with our findings and a quote within 15 minutes of finishing the inspection if work is recommended. No charge, no obligation.

It depends entirely on the extent of decay and whether the fix is a repair or a replacement, which is exactly why we don't quote a number without seeing the wood and taking a real reading first. The free inspection gives you an actual, written price for your specific situation, not a rough estimate.

It ranges from a same-day fix for a contained repair to about a week for a larger job like a full deck replacement, depending on scope. Your written quote includes a realistic timeline for your specific job.

Yes. Every job comes with our 2-year craftsmanship guarantee. If our workmanship fails during that time, we repair or replace the work at no charge. Full terms are in your written quote.

We serve Vancouver and the surrounding Metro Vancouver area. If your community isn't specifically listed on our service area page, call us, we likely still travel there.

Wherever you are in Metro Vancouver, we're worth a call. Wood Rot Repair Vancouver, BC. Stop the rot co.

Wherever you are in Metro Vancouver, we're worth a call.

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