Sunday, November 8, and the fence cap is still dark after the shower. The panel boards have shed. The flat board on top, and the cut top of the post, have not. Moss sits there like a sponge, and the wood under it is wet.
Steady rain does not rinse that shelf. It refills it. Douglas fir needles and cedar scales lodge in the cushion and keep the joint damp. Nanaimo receives over 1,100mm of rain a year, and early November is when short days stop a shaded cap from drying between systems.
This post stays on fence caps and post tops. The panel faces, the bottom rail, and the lattice are the fence-line guide. The leaf and the pad you step through are the side-gate guide. A wood deck is the deck and stairs guide. A concrete or stone garden wall, including a wood cap on that wall, is the retaining wall guide. Cleaning is not fence repair, and it is not a new post.
Why the cap stays wet once November evenings go dark
A September afternoon still puts light on a south-facing run. After the clocks changed on Sunday, November 1, that same cap is in shade by mid-afternoon, and a north run under western red cedar may not see the sun at all. The boards can look ordinary from the street while the shelf on top is still holding last night's rain.
A shelf, not a wall
A vertical board sheds. A cap is a shelf. Rain lands on the flat, or on the crown of a peaked cap, and sits at the joint where that board meets the post. The cut top of a post is end grain. Water moves along the fibres there, not off the face the way it leaves a panel. A bare top with no cap drinks the shower. A cap that has cupped, or a screw hole in the crown, gives the water a path into the same cut.
The moss is what keeps the shower there. A thin green film on a board lightens once the wind gets at it. A cushion on the cap holds the water against the wood until the next system arrives. Needles on that cushion stop it drying. By the second week of November the cap can still be dark when the panels have lightened.
Shade does more than the forecast
North Nanaimo and Lantzville often have Douglas fir or western red cedar over the lot line, so the caps sit in drip all month. Parksville and Qualicum Beach add Oceanside damp. Ladysmith and homes in Cedar see the same dark post tops where the fence misses a dry afternoon.
A downspout that ends at the fence line feeds one run. The panels a few metres away can look ordinary and the caps under that spout can be spongy. If that water comes from a packed trough, gutter cleaning with a full downspout flush belongs with the caps.
What the held water does to the wood
Wood that stays wet softens. It shows first at the joint, in a check, and around a screw, where the end grain never quite dries. A green film on sound wood is a wash. A cap that rocks, a crown you can press in with a thumbnail, or a post that gives when you lean on it is past a wash. Cleaning takes the growth off wood that can still dry. It does not dry a post that has already gone soft, and it does not stop the next November from wetting a cap that sits under cedar.
The cap, the post top, and the joint between them
The panels are what you notice from the yard. The water sits on the shelf: the cap board, the square top of the post, and the shoulder where the two meet. Shade, drip, and needles meet there, so those surfaces stay wet after the boards have shed.
Where the growth actually sits
On a cedar privacy fence, moss fills the flat cap and the top of each post. A peaked cap still holds a line of growth along the crown and a thicker pad at the post. Dog-eared boards may have no continuous cap at all, and the cut post tops are then the shelves. Algae films the shade face of the post just under the cap. A metal cap can look tidy and still hide a wet top underneath. Do not pry a fastened cap off to look. A loose one is a note for the quote, not a job for a knife.
A dark band only under a spilling gutter means the fence is being fed. The panels beside that post are their own pass. If the leaf at the end of the run is the slick part, that is the side gate, not this cap.
What you can see from the yard
Stay off a ladder. On a standard privacy fence the cap is a ground-level read. After a shower, walk the run in daylight. The colour on the shelf is the clue. The feel of the post is the other one.
- A cap that stays dark after the boards have lightened. That shelf is holding water.
- A moss cushion on the flat, with needles stuck in it. The cushion is the sponge.
- Green or black film in the post-to-cap joint. That is the wood that dries last.
- A cap that rocks, a screw standing proud, or a crown that dents and stays dented. The film is a wash. The soft wood is not.
- A post that moves when you push it at chest height. A wash will not fasten it.
Caps, posts, and metal are not the same wash
One lot line often has a cedar cap, a bare post top, and a metal cap on the same afternoon. A close jet that suits sound concrete at the base will raise the grain on the cap and drive water into the cut.
| What you see on the fence | What it usually means | Sensible next step |
|---|---|---|
| Moss on a sound cedar cap or a bare post top | Growth on a shelf and in the end grain | Soft wash only. A close jet raises the grain and drives water into the cut |
| Green film on a stained or painted cap, finish sound | Algae on a finish that can stripe | Soft wash and dwell. Pressure lifts the finish |
| Algae on a metal cap, finish sound | Film on metal that stays damp | Soft wash, then a gentle rinse. Do not pry the cap off |
| A dark band only where a gutter or a cedar drip lands | The cap is being soaked from above | Open the gutter and the downspout, then wash that run |
| A rocking cap, a split crown, or a post that moves | A repair, with film on top of it | A qualified contractor before a wash will hold |
| Green panel faces, a bottom rail, or lattice | Growth on the fence line, not on the cap | Wash the caps and posts, then the panels as their own pass |
Do not scrape cedar to hurry the colour. A knife takes the soft grain and leaves growth in the pores.
What a careful clean looks like
Early November still has mild gaps between systems. Rain mid-visit rinses a treatment off before it has worked, so the solution needs time to sit.
Treat the growth, then rinse where the wood can take it
Soft washing puts an eco-friendly biodegradable solution on the growth at low pressure and leaves time for it to work. That is the start on a cedar cap, on a bare post top, on a stained board, and on a metal cap. A close jet on the cut drives water down the post.
Pressure washing belongs on sound concrete at the base, clear of the wood, after the film has been treated. Keep the jet off the cap. Fences are a soft-wash surface when the wood is the job. House washing on the siding beside the run is a separate pass.
A sensible order when the cap is being fed
- The water path first. If a gutter dumps onto the fence, flush that downspout before the cap is the finished surface.
- Roof growth next, if it sheds onto the caps. On a sound roof, moss removal and roof cleaning come first. The site FAQ says most Nanaimo roofs stay moss-free for 3-5 years with soft wash and ridge zinc strips. That claim is about the shingles, not this fence. Failing shingles go to a roofer.
- Loose needles off the cap, without scraping the grain or packing debris into the joint.
- The cap and the post top, solution where the growth is living, then a gentle rinse. Siding beside the fence waits until the splash stops.
- The panel faces, if they are in the same booking, as their own pass. The fence-line guide is that scope. The bottom rail and the lattice are part of it.
- Glass the rinse will hit, after the fence is done. Window washing is that last pass.
Name a bed, a pond, or a rain barrel along the run before the rinse. The garden, pets, and rain barrel guide is the longer note. A strata fence on a shared path is commercial services. If the week of Wednesday, November 11, is solid rain, book the next opening so the solution can sit.
What a wash will not fix
A clean cap is easier to see on a dark walk past the lot line. It is not a repaired post, and it is not a promise that wood under cedar will stay dry.
Soft wood stays soft
A post that moves, a cap that has split through, a crown you can press in with a thumb, or a fastener pulled from soft wood is contractor work. If the post gives when you lean on it, book the repair first. Cleaning is not fence repair. A crew can wash a sound cap. They cannot sister a post, or fasten a cap that has nothing left to hold a screw.
Clean is not sealed
A wash removes moss and algae. It does not install a cap, a stain, or a sealer. Rain on bare end grain is still rain. Growth under cedar comes back. November is a reset before the dark stretch, not a bare cap until spring. If the only access is a locked side yard, say so. The leaf has to stay usable while the run is wet.
Questions from the fence cap
Will November rain wash the caps clean? Rain wets the cushion and moves a few loose needles. A cap that looked dusty in September can be spongy at the post by the second week of the month. Rain does not lift the film in the joint.
Can a close jet replace a treatment? On sound concrete clear of the wood, pressure lifts dirt after the growth has been treated. On a cap, on end grain, and on a stained board it raises the grain or stripes the finish, and it drives water into the cut. Those surfaces take soft washing.
The panels were cleaned in October. Why are the caps still green? A fence wash stays on the faces that were in that scope. A flat cap and a cut post top hold water the vertical boards shed, and November has kept that shelf wet since the visit.
Does a clean cap mean the post will not rot? It removes the moss and algae that keep sound wood wet. It does not dry wood that has already gone soft, and it does not seal the end grain. A post that moves, or a cap that dents and stays dented, is a repair. Cleaning is not that repair.
Book the caps before the dark stretch settles
After the next shower, walk the fence once in daylight. A cap that stays dark, a moss cushion on the post top, or a joint filmed green is the November problem on a wood fence. Book those caps and post tops while a mild gap still exists. A post that moves, or a cap that has already split, goes to a contractor first. Cleaning is not that repair.
On the quote form you can choose House Washing / Soft Washing, Pressure Washing, Roof Cleaning & Moss Removal, Gutter Cleaning, Window Washing, Commercial Services, Multiple Services, or Not Sure — Just Need a Quote. Ground-level photos of the caps, the post tops, the joints, and any downspout that soaks them help us size the job before we arrive. Note whether the wood is cedar or another species, whether it is bare, stained, or painted, and whether any caps are metal. Say if a plant bed, a pond, or a rain barrel sits along the run, and whether the side yard is locked. We serve Nanaimo, Parksville, Lantzville, Ladysmith, Cedar, Qualicum Beach and surrounding central Vancouver Island communities, fully insured, with eco-friendly biodegradable soft-wash solutions where the growth needs treatment before a rinse. House jobs start from residential services.