· by Michael Blair, Nashville's Pressure Washing
Middle Tennessee delivers a heavy spring pollen load and enough humidity for organic growth most of the year. Exteriors here need attention more often than the general advice suggests.
A workable interval
Whole-house wash every one to two years, sooner on shaded elevations. Concrete and driveways annually if under trees, otherwise every two or three years.
Roofs only when there is visible algae streaking, and by soft wash only.
Timing within the year
After the spring pollen drop is the natural point, typically late spring once the heaviest fall is over. Washing before it is finished means doing it twice.
Autumn is the second sensible window, clearing organic material before winter damp sets in.
- House: every one to two years, after spring pollen
- Driveway and walks: annually under trees
- Deck: annually, before sealing
- Roof: only when algae streaking is visible, soft wash
- Gutters: cleaned separately, twice a year
Why it is maintenance not just appearance
Organic growth holds moisture against a surface, which accelerates finish failure on wood and degrades sealants. On a roof, algae holds moisture against the shingle.
Removing it is genuinely protective rather than purely cosmetic, particularly in our humidity.
What to do yourself
A garden hose and a soft brush handles a single-story wall and most concrete adequately if you are prepared to spend the time.
Two-story work, roofs and anything requiring solutions is worth handing over, mostly because of the ladder rather than the equipment.