Vancouver Island's climate is tough on home exteriors. Between the rain, humidity, tree debris, and salt air (for coastal properties), grime builds up faster than many homeowners realize. Here are seven signs your Nanaimo home is overdue for professional exterior cleaning.

1. Green or Black Streaks on Your Roof

Those dark streaks aren't just dirt — they're algae, moss, or lichen. Left untreated, they hold moisture against your roof and accelerate shingle deterioration.

2. Gutters Overflowing in Rain

If water cascades over your gutters during a storm, debris is blocking the flow. This can lead to foundation damage, basement flooding, and fascia rot.

3. Siding Looks Dull or Discolored

Mildew, pollen, and general grime accumulate on siding over time. What looks like faded paint is often just buildup that soft washing removes.

4. Windows Have Hazy Film

Hard water spots, tree sap, and oxidation create films that household glass cleaner can't cut through. Professional window washing restores clarity.

5. Black Spots on Concrete

Oil stains, mold, and organic growth create unsightly spots on driveways and patios. Pressure washing brings concrete back to life.

6. You're Preparing to Sell

Curb appeal matters. A clean exterior can increase perceived home value and help your listing photos shine.

7. It's Been More Than a Year

Even if your home looks "okay," annual exterior cleaning prevents buildup that becomes harder and more expensive to remove.

Ready to restore your home's appearance? Explore our residential services or Get a Free Quote.

Read the stains before you pick a service

The seven signs above are easy to see from the driveway. They are not all the same job. A green roof, a spilling gutter, a dull wall, and a hazy window can share one wet winter and still need four different methods. Nanaimo's coastal rain, tree cover, and salt air near the water just make those signs show up sooner than they would on a dry inland lot.

Use the list as a sort, then send photos of the worst elevation. A quote that tries to pressure wash every one of those surfaces will fix the driveway and risk the roof.

Roof streaks versus a moss mat

Dark streaks on asphalt are often algae. A raised green mat is moss. Both hold moisture, but the moss mat is the one that lifts edges and sheds into the valleys. Algae and loose debris are the roof cleaning in Nanaimo conversation. Living moss on asphalt, cedar, or metal is moss on the roof, handled as roof moss removal. If you only wash the streak and leave the mat, the gutter will fill with what the mat sheds all winter.

Gutters that overflow, and walls that look tired

Overflow in an ordinary rain means the trough or a downspout is blocked. On this coast that blockage is usually needles, moss grit, and leaves packed wet, not a single maple drop. Staining on the siding under a corner is the clue that it has been happening for more than one storm. The schedule post is how often to clean gutters in Nanaimo. Cleaning the gutter without looking up at a shedding roof means you will do it again after the next rain.

Dull or green siding is usually mildew and algae in the shade, sometimes mixed with pollen and traffic film. Soft washing is the method for that film on delicate surfaces. If the whole house exterior is the project, including vinyl, Hardie board, stucco, or cedar, that scope is house washing. Do not treat a faded wall as a reason to use driveway pressure on the siding. Soft washing versus pressure washing is the split to read before you book both.

Glass, flatwork, and the outdoor rooms

A hazy window can be hard water from sprinklers, a salt film if you are near the water, or pollen and cedar dust. Those are glass problems. Washing the siding first, then the glass, keeps rinse water from becoming the next haze. If the spots feel rough under a fingernail and laugh at a normal glass cleaner, they are mineral stains, covered in the hard water post rather than a routine wash.

A green or black driveway is a hard-surface job. Concrete and pavers can take pressure washing. The same green on a wood deck or a cedar fence should not. Decks and fences belong with soft washing. If the path is slick in the first autumn rain, that is a traction issue, not only a looks issue, and it is worth doing before the wet season locks the film in.

Salt air does not replace any of this. It adds film to glass and speeds up how weathered frames and trim look. A house set back in the trees and a house near the shoreline can share a mossy roof and still need different attention on the glass.

A simple order if several signs are true

Roof growth first, so debris is not still falling into clean gutters.
Gutters and downspouts next, including the corners you cannot see from the street.
Walls, fences, and decks with the low-pressure method that matches the material.
Driveways and walks where the surface is actually concrete or stone.
Windows last, inside and out if the listing or the room needs the light.

You do not have to book all five. The list stops you from booking them backwards. If you are about to list the house, the seller checklist puts the same order against photos and showings.

For the full set of home services, see residential exterior cleaning in Nanaimo.

7 Signs Your Nanaimo Home Needs Professional Exterior Cleaning