Mildew grows straight through a Carolina winter, the calendar is wide open, and the pollen has not arrived yet. What can be done in the cold, what has to wait, and the one number that decides the day.
A Johnston County winter averages highs in the low fifties and lows just above freezing, with plenty of rain. Mildew, algae, and moss are all perfectly comfortable in that. What changes in December is not the biology, it is that the days are short, the light is flat, and nobody is standing in the yard looking at the house.
Then the first warm Saturday in March arrives, everybody looks at their siding at once, and the whole trade books out for a month. The growth that shocks people in spring has been accumulating quietly since October.
Washing in January or February inverts that. You go into spring clean, and the pollen lands on a washed surface rather than on a wall that already had a winter of mildew on it.
Not the forecast high. The overnight low, and whether the surface can dry before the temperature drops.
| Conditions | What we can do |
|---|---|
| Above 50 during the day, above freezing overnight | Everything. This is a normal working day and there are plenty of them here in January. |
| 40 to 50 during the day, above freezing overnight | House washing, roof washing, gutters, most flatwork. We start later and finish earlier so surfaces dry in the light. |
| Daytime above freezing, overnight below | Case by case. Vertical surfaces that shed water are usually fine. Flatwork that holds a film of water is not, because that film becomes ice. |
| At or below freezing during the work | Nothing. Equipment freezes, surfaces glaze, and walkways become a liability. We reschedule and it costs you nothing. |
The real constraint is ice on walkways and steps, not damage to the house. A wet north-facing porch step at four in the afternoon in January is the hazard we are actually managing, which is why winter jobs start early.
The hardwoods are done by early December. Clearing gutters in winter clears the whole year at once rather than clearing them in October and doing it again.
Sightlines and access to the roof and the upper elevations are better with no leaf canopy in the way, and the crew can see what it is treating.
Anything washed between November and February stays clean. Anything washed in April gets a yellow film on it within days, which is nobody fault and still annoying.
This is the quiet quarter. You can pick a day rather than take one, and the crew is not working through a backlog.
The growth people find in February is usually mildew rather than the green algae of late summer: darker, patchier, and concentrated on the shaded elevation, under eaves, and along the gutter line. It responds to exactly the same soft wash. The solution is not temperature-dependent in any way that matters at the range we work in.
What is temperature-dependent is dwell. Cold slows chemistry down a little, so the crew allows more time on the wall rather than turning up the pressure, which is the correct trade in every season.
We work through the winter across Clayton, Smithfield, Garner, Raleigh, and everywhere else on our list, weather permitting. If a day turns out to be too cold when it arrives, we move it and you pay nothing for the change.
If your house is already showing growth in November, do not wait for spring. It will be worse in March, and so will the wait for an appointment. Call (919) 698-3669.
“Came out on a weekend when I needed it and the results were excellent. Real person answered the phone every time.”
“Same-day service and the whole property looks better. Will use them every year.”
“Siding and windows on the same day and the whole house looks lighter. Careful with the beds and easy to schedule.”
Aluminum chalks for a different reason than vinyl does, and the decision at the end is different too. How to test what you have, what a restoration wash actually achieves, and when paint is the honest answer.
Read the guide →HOAWhat a multifamily property actually needs cleaned, how often, and why the surfaces that generate complaints are almost never the ones in the budget.
Read the guide →BookingWhere the truck parks, whose water we use, how long it takes, whether you need to be home, and the short list of things to move, close, or unplug before we get there.
Read the guide →We fly the roofline and show you the footage on the spot. You see your own gutters, joints, and downspouts on the screen instead of taking our word for it. It costs nothing and you are not committing to the cleaning.
Free for homes and businesses across the Triangle and Johnston County. No obligation to book any work afterwards.
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