Pressure Washing

Revitalize your property's exterior surfaces with professional pressure washing services from Monges Landscaping, serving homeowners and businesses throughout Boston, Cambridge, Newton, Brookline, Wellesley, and the greater Metro West and Worcester areas. Over time, New England's demanding weather takes a heavy toll on outdoor surfaces. The combination of humid summers, freezing winters, road salt spray, tree pollen, and abundant rainfall creates ideal conditions for dirt, mold, mildew, algae, and grime to accumulate on every exterior surface of your home. What was once a bright, clean driveway gradually turns gray-green. Your deck develops a slippery film of mildew. Your siding becomes streaked and dingy. Professional pressure washing strips away years of buildup in a matter of hours, restoring surfaces to like-new condition and dramatically improving your property's appearance and value.

Understanding why exterior surfaces deteriorate helps explain why pressure washing is not merely cosmetic. Mold and mildew are living organisms that actively consume organic matter — on wood surfaces, they break down lignin and cellulose, causing rot. Algae produces acids that etch into concrete and stone, creating pitting and permanent discoloration. Lichen adheres to shingles and pavers with root-like structures that physically damage the surface. Road salt residue (ubiquitous in Massachusetts from November through April) is corrosive to concrete, metal, and even stone. Tree sap and pollen create sticky films that trap dirt and accelerate staining. By removing these contaminants regularly, pressure washing extends the functional life of your driveways, decks, siding, and fences by years — saving you thousands in premature replacement costs.

Our cleaning solutions are selected specifically for each surface type and contaminant. For concrete driveways and garage floors, we apply a sodium hydroxide-based degreaser that emulsifies oil and petroleum stains, followed by a sodium hypochlorite solution to kill mold, mildew, and algae. We allow the solution to dwell for 5-10 minutes before washing, giving it time to penetrate and loosen deeply embedded stains. For wood surfaces (decks, fences, and siding), we use a sodium percarbonate (oxygen bleach) cleaner that brightens wood and kills mildew without damaging the wood fibers, the way chlorine-based products can. For vinyl siding, we use a dilute surfactant blend with low-concentration sodium hypochlorite that removes organic growth and dirt without discoloring or warping the vinyl. For brick and natural stone, we use pH-neutral cleaners that lift stains without etching the surface or degrading mortar joints. For efflorescence (the white mineral deposits that appear on masonry), we apply a mild acid wash specifically formulated to dissolve calcium salts.

Here is a guide to appropriate pressure levels for common surfaces. Concrete driveways and sidewalks can handle 3,000-4,000 PSI with a 15-25 degree fan tip. Brick and stone pavers should be washed at 2,000-3,000 PSI with a 25 degree tip to avoid dislodging joint sand. Wood decks require 1,000-1,500 PSI with a 40 degree tip (or soft wash), always working with the grain to prevent splintering. Vinyl siding should be soft washed at 500-1,000 PSI with a 40 degree tip, working from bottom to top to prevent streaking. Painted wood siding requires gentle soft washing at 500-800 PSI to avoid stripping or chipping paint. Composite decking and Trex surfaces use 1,000-1,500 PSI maximum with a wide fan pattern. Pool decks and stamped concrete use 2,000-3,000 PSI to avoid damaging surface texture or sealant.

How often should you pressure wash different surfaces? Concrete driveways typically need washing once per year, or twice if they are in heavily shaded areas that promote mold and algae growth. Decks should be washed annually, ideally before re-staining (most stains last 2-3 years in the Massachusetts climate). House siding benefits from washing every 1-2 years, depending on sun exposure and tree proximity. Fences should be washed every 1-2 years. Commercial sidewalks and storefronts may need monthly or quarterly cleaning for appearance standards.

Common pressure washing mistakes that damage property include using too much pressure on delicate surfaces, holding the spray tip too close to the surface (which concentrates force and creates etching or gouging), washing wood siding from top to bottom (which forces water up under the lap joints and into the wall), neglecting to pre-treat surfaces with cleaning solutions (relying on pressure alone is less effective and requires more aggressive technique), using chlorine bleach on wood (which damages the fibers and leaves a fuzzy, raised grain), and failing to protect adjacent plants and landscaping from chemical runoff. Our trained technicians avoid all of these errors and take precautions to protect your property throughout the process.