Brick Exterior Washing in Northern Virginia
Northern Virginia is brick country. Decades of residential development across Fairfax County, Arlington, Alexandria, and Prince William County produced neighborhoods defined by classic brick Colonial, split-level, and ranch-style homes. The same brick that gives these homes their enduring character also presents a specific maintenance challenge: brick is porous, mortar joints are vulnerable, and the humid climate of Northern Virginia makes biological growth on brick surfaces almost inevitable.
At Edwards Enterprises Custom Painting, we’ve been working on brick homes across Northern Virginia since 1997. We wash brick as a standalone service — for homeowners who want to restore their home’s appearance — and as a preparatory step before brick painting, brick whitewashing, or other masonry finishing work. Either way, the goal is the same: a clean, sound surface without damage to the brick face or the mortar joints.
What Grows on Brick Exteriors in Virginia
The combination of porosity, shade, and humidity that characterizes so many Northern Virginia brick homes creates ideal conditions for biological growth. What you’re seeing on a stained brick facade can include several different things:
Green algae is the most common culprit. It appears as a thin green wash or streaking, typically most prominent on shaded north-facing walls, on lower brick courses near grade, and on sections beneath tree canopy. Algae doesn’t damage brick directly, but it’s unsightly and it holds moisture against the surface longer than clean brick would.
Moss goes one step further than algae. Where algae is a thin film, moss is a three-dimensional plant that roots into the mortar joints and the pores of softer brick. In areas with heavy shade and persistent moisture — common in wooded communities like Clifton, Burke, and parts of Fairfax County — moss can colonize entire sections of a brick wall. Left long enough, moss root systems can contribute to mortar joint deterioration.
Efflorescence is the white or gray chalky bloom that appears on brick when water moves through the wall assembly and carries dissolved salts to the surface. It’s a very common condition on Northern Virginia brick homes, particularly after wet winters or in areas with poor drainage. Efflorescence is not a structural problem on its own, but persistent efflorescence can indicate ongoing moisture infiltration that warrants investigation.
General atmospheric soiling — carbon deposits, dust, airborne pollutants — accumulates on brick over years and decades, giving it a dingy appearance that isn’t the result of biological growth but is equally responsive to a good wash.
Soft Washing vs. Pressure Washing for Brick
The decision about how to wash brick is not a simple one, and it’s where inexperienced operators cause the most damage. High-pressure washing — even at pressures considered moderate for concrete — can erode brick faces, blow mortar out of joints, and drive water deep into the wall cavity where it has no way to escape quickly.
For most brick homes in Northern Virginia, our preferred approach is soft washing: applying an appropriate cleaning solution at low pressure, allowing dwell time for the solution to break down algae, moss, and soiling, and then rinsing at controlled pressure. This approach cleans the brick effectively while keeping pressure levels well below what would cause any surface or mortar damage.
When higher pressure is appropriate: Brick in good condition with solid, intact mortar joints and no visible porosity issues can handle more pressure than older or compromised brick. New brick construction, brick pavers, and brick in low-traffic areas with no mortar concerns can often be washed at higher pressure without risk. We assess each situation before setting our equipment.
Older brick requires extra care: Pre-WWII brick homes — which are common throughout Alexandria, Arlington, and the older neighborhoods of Fairfax — used softer brick and lime-based mortar that is significantly more vulnerable to pressure damage than modern construction. Soft washing is almost always the right call for historic or older brick, and we approach these homes with the care they deserve.
Efflorescence Removal
Efflorescence removal requires more than just washing — it requires the right chemical approach. Water alone, even at pressure, will re-dissolve and redistribute the salt deposits rather than removing them. We use appropriate efflorescence cleaners that react with and dissolve the salt crystals, followed by thorough rinsing.
For brick experiencing active, recurring efflorescence, washing solves the visible problem but doesn’t address the root cause. If water is consistently moving through the wall assembly, the efflorescence will return. In those cases, we’ll discuss what we observed with the homeowner and recommend appropriate follow-up — waterproofing, masonry sealing, or consultation with a masonry specialist if structural concerns are present.
Washing Brick Before Painting or Whitewashing
If you’re planning to paint or whitewash your brick home, washing is the essential first step — and it has to be done correctly. Paint and limewash products depend on penetrating the open pores of clean brick. Dirty, algae-covered, or efflorescence-stained brick won’t accept these finishes evenly, and the bond between the finish and the brick will be compromised from day one.
Our brick washing service is specifically designed to prepare the surface for the next step, whatever that is. When we’re managing a brick painting or whitewashing project, the washing phase is integrated into our workflow with appropriate time allowed for drying before any finish product is applied.
For homeowners preparing for a DIY finish, we’re glad to provide a thorough professional wash and leave the surface in optimal condition for the work ahead.
Brick Homes We Serve Across Northern Virginia
Brick homes are concentrated throughout our service area — in the established neighborhoods of Fairfax County, the older subdivisions of Prince William County, and throughout the communities of Arlington, Alexandria, McLean, and Annandale. We also see brick extensively in Woodbridge, Lake Ridge, Dale City, and the Gainesville and Haymarket area, where brick Colonial homes are a staple of the residential landscape.
Our brick washing work serves homeowners in every community we cover: Manassas, Centreville, Fairfax, Gainesville, Woodbridge, Herndon, Reston, Ashburn, Leesburg, Sterling, Haymarket, Bristow, Nokesville, Manassas Park, Dale City, Lake Ridge, Chantilly, South Riding, Burke, Springfield, Alexandria, Arlington, McLean, Clifton, Annandale, Fairfax Station, Independent Hill, Montclair, Dumfries, and Occoquan.
Schedule Your Brick Washing Assessment
Whether your brick exterior is coated in algae, blooming with efflorescence, or simply showing years of accumulated grime, Edwards Enterprises Custom Painting can help. Call us at 703-330-9980 to schedule a free on-site assessment. We’ll evaluate your brick and mortar condition, identify the appropriate cleaning approach, and provide a clear written estimate. If you’re planning to paint or whitewash your brick afterward, we can give you a comprehensive proposal for the entire project.