Spring Pressure Washing Checklist for Houston Homes

Spring in Houston means two things for your home's exterior: pollen season just ended, and the heavy humidity is about to kick into high gear. That window between late March and early May is the best time to clean everything outside. You're removing the winter's accumulation of mold, the pollen coating from February and March, and you're resetting surfaces before the summer moisture cycle accelerates biological growth. This is our busiest season for a reason. If you're going to clean once a year, spring is the time to do it.

Here's the checklist we recommend for Houston homeowners, in the order we'd tackle it.

1. Gutters First

Start at the top. Houston's winter, mild as it is, still drops enough leaves, pine needles, and debris to clog gutters and downspouts. Clogged gutters cause water to overflow and run down exterior walls, which causes the staining you see below rooflines. Cleaning the gutters first means the wall washing you do next won't be undone by the next rain.

What to check:

• Clean out all debris from gutter troughs
• Flush downspouts with a hose to confirm they drain freely
• Check that gutter brackets are secure (Houston's heavy rain puts stress on loose brackets)
• Clean the exterior face of gutters, which develops black streaks from oxidation and organic runoff

If your gutters haven't been cleaned since fall, they're overdue. Houston homes under tree canopy should clean gutters twice a year at minimum. Our gutter cleaning service handles both the interior cleanout and exterior face washing.

2. Roof Inspection and Soft Wash

From the ground, look at your roof. If you see dark streaks running down asphalt shingles, that's Gloeocapsa magma, a type of algae that feeds on the limestone filler in shingle material. It's cosmetic at first but eventually degrades shingle granules if left untreated for years. Houston's humidity makes this growth practically unavoidable on north-facing roof planes.

Roof cleaning is always a soft wash. No high pressure touches the roof. We apply a treatment solution at low pressure that kills the algae, and the dead growth rinses away over the next few rain cycles. A roof soft wash also treats lichen and moss, which are less common in Houston but do appear on heavily shaded roofs.

Not every roof needs cleaning every spring. If your shingles look clean from ground level, skip it this year. But if you see dark streaks or discoloration, spring is the right time to address it before summer heat bakes the growth further into the surface.

3. House Exterior Wash

This is the big one. After a Houston winter, most home exteriors show some combination of mold, mildew, dirt film, and pollen residue. The north and east-facing walls are almost always worse because they get less direct sunlight and stay damp longer.

For Houston homes, exterior washing is a soft wash job, not a high-pressure job. High pressure on siding, stucco, or painted surfaces causes damage. We use a low-pressure application of sodium hypochlorite solution that kills biological growth at the cellular level, then rinse at low pressure. The results are immediate, and the treatment provides several months of protection before new growth begins.

Spring-specific concerns for Houston house washing:

• Pollen film. The yellowish-green haze on everything after February and March live oak pollen season. It washes off easily but needs to be removed before it bonds through rain cycles.
• Winter mold accumulation. Houston's winter isn't cold enough to kill mold. It just grows slower. By March, you've got five months of slow growth layered on exterior walls.
• Wasp and dirt dauber nests. Check eaves, soffits, and porch ceilings. These get built during the mild months and should be knocked down before the insects get active in April and May.
• Spider webs. Houston's exterior spiders are prolific. The soft wash stream clears webs, egg sacs, and the debris caught in them.

4. Windows

After the house wash, clean the windows. Do this after, not before, because the house wash will splash dirty runoff across glass surfaces. A basic exterior window cleaning removes the pollen film, hard water spots from sprinklers, and dirt accumulation. You don't need pressure for windows. A squeegee and cleaning solution works better and doesn't risk seal damage.

5. Driveway, Walkways, and Patio

Concrete flatwork is where pressure washing makes the most dramatic visual difference. A Houston driveway that's been sitting through winter will have visible mold growth, especially in shaded areas and along edges where moisture collects. Walkways and front porches develop the same film.

Spring is the ideal time because you're catching the growth before summer humidity accelerates it. A driveway cleaned in April will stay looking good through most of the summer. Wait until August, and you've got eight months of accumulated growth that takes longer and costs more to remove.

Don't forget the often-overlooked flat surfaces:

• Garage floor (especially if you park with wet vehicles during spring rain)
• Mailbox pad and curb in front of the house
• Trash can storage area
• AC pad (the concrete slab your outdoor unit sits on)

6. Fence and Deck

Wood fences and decks take the hardest hit from Houston's climate. The moisture-to-heat cycle causes mold penetration into wood grain, and a fence that looked fine in November may be visibly green by April. Soft washing is the right approach for wood. High pressure damages wood fibers and accelerates deterioration.

If your deck or fence is due for staining or sealing, spring cleaning is the necessary first step. You can't stain over a dirty surface. Clean it, let it dry for 48 to 72 hours, then stain. The USDA Forest Products Laboratory recommends cleaning wood surfaces before any protective coating application.

7. Pool Deck (If Applicable)

Before pool season starts, clean the deck surface. Winter leaves a film of algae and dirt on pool surrounds that becomes a slip hazard once people start walking on it with wet feet. Travertine, flagstone, and cool-deck surfaces all develop this growth. A spring cleaning makes the pool area safe and presentable before Memorial Day weekend.

The Order Matters

We clean top to bottom, always. Gutters before roof. Roof before walls. Walls before ground surfaces. Dirty water flows downward. If you clean the driveway first and then wash the house, runoff from the house wash dirties the driveway again. Following the correct sequence means every surface stays clean after the crew leaves.

What If You Can Only Pick One Thing?

If your budget only covers one service this spring, clean the driveway and front walkway. It's the surface people see every day, it has the highest visual impact, and it's the most cost-effective single service. A clean driveway changes how the entire front of the house looks. Everything else is a bonus.

Ready to knock out your spring cleaning list? Call (713) 555-0238 or request a free quote. We can handle the full checklist in a single visit or break it into priority stages.