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Guide

Facade cleaning for commercial buildings, by material.

Exterior walls tell visitors how a property is run. Here is how each facade material is cleaned, and where that work sits in a facility program.

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Commercial property

Match the method to the material.

Commercial facade cleaning is not one technique. The pressure that strips grime from a concrete sidewalk can etch stone, force water behind stucco or scratch a coated metal panel. Each material calls for its own mix of water pressure, water temperature, cleaning solution and dwell time, and the right combination lifts the soil while protecting the finish.

Good facade work starts before the wand comes out. Crews test a small patch out of sight, note cracks, failed sealant and loose mortar, and cover landscaping, entry hardware and open vents against overspray. Runoff near storm drains is handled in the same setup. Those steps take minutes and keep a cleaning visit from turning into a repair bill.

Glass curtain wall and storefronts.

Glass shows soil first and forgives the least. At street level, storefront glass, entrance doors and the frames around them are cleaned by hand with squeegees and soft water so they dry without spots. Frames and mullions are wiped rather than blasted, because direct spray drives water past the gaskets. Hard-water spotting from sprinkler overspray is treated with a glass-safe cleaner before it etches the surface.

Upper-floor curtain wall reached from a suspended platform or by rope access is planned as its own project, while the ground-floor glass, the entrances and the sidewalk below stay on the regular calendar.

Stucco and EIFS.

Stucco is porous and textured, so dirt settles into it and high pressure pushes water into the wall. The right approach is a low-pressure wetting pass, a mild detergent left to work, a soft brush on heavy staining and a thorough low-pressure rinse from the top down. Mildew on shaded walls, common on north faces and behind tall plantings, is treated in the same visit.

Exterior insulation and finish systems, known as EIFS, look like stucco but are softer still. They take the gentlest pressure on the property and no abrasive scrubbing at all. Hairline cracks and open joints around windows are noted and reported before washing, so water stays out of the wall assembly.

Brick and masonry.

Brick handles more pressure than stucco, but the mortar joints are its weak point. Washing uses moderate pressure, a wide fan tip held at a steady distance and detergents made for masonry. Efflorescence, the white mineral bloom that appears after wet weather, is dry-brushed first and then treated with a masonry cleaner, since a heavy soaking only draws more salts to the face of the brick.

Older brick with soft or crumbling mortar gets a gentler wash and a note for the masonry contractor. Gum, rust and grease stains near entrances, loading areas and dumpster enclosures are pretreated before the general wash so they release cleanly instead of spreading.

Metal panel.

Aluminum composite and painted metal panels carry factory finishes that dull and scratch under harsh treatment. They are washed at low pressure with non-abrasive detergents and soft brushes or microfiber, working top down in sections so the solution never dries on the panel. Light oxidation on older painted panels is treated gently, and sealant lines stay out of the direct spray.

Metal panel shows streaks and water marks plainly in direct sun, so washing is timed for the cooler hours of the day. That timing also keeps the crew clear of tenants arriving in the morning and leaving at the end of the day.

Natural stone.

Granite, limestone, sandstone and marble each react differently. Granite tolerates moderate pressure and neutral cleaners. Limestone and marble are calcium-based, so acidic products etch them; they take neutral or alkaline cleaners, low pressure and a careful rinse. Sandstone is soft and erodes under a concentrated jet, so it gets the widest tip and the lightest touch.

Stone cladding at a building entrance usually meets stone or concrete paving on the plaza, and the two are cleaned in one visit. Our pressure washing crews treat the wall and the hardscape as one frontage, so the entrance reads as a single clean surface from the curb.

Where facade work fits a facility program.

Facade washing works best as a line in the same program that covers janitorial, porter and grounds, not as a one-off project nobody owns. The walls that take the most soil, at entrances, loading areas and behind dumpster enclosures, are washed more often, and full elevations less often. Our exterior upkeep schedule sets how often the lot, walkways and grounds get attention, and facade washing slots into that same calendar.

In a quote, the facade line names each elevation and its material, the method for each, the frequency, the hours crews have access and who reports damage found during the wash. Porters and the window and detail crew hold the result between visits, with entrance glass wiped daily and storefront frames on their own cycle. When you write the plan, list facade materials beside the interior areas, as our facility services scope guide describes, and the walkthrough confirms them on site.

A few useful answers

Quick answers.

How often does each part of a facade need washing?

Entrance-level walls and storefronts usually need washing several times a year, while full elevations go once or twice a year. Shaded walls with mildew and walls beside busy roads or docks move to the shorter end.

What pressure suits a stucco facade?

Low pressure only. Stucco takes a gentle rinse with detergent and dwell time, while high pressure forces water into the wall and damages the finish.

What causes the white bloom on brick walls, and how is it removed?

That bloom is efflorescence. Dry-brush it first, then treat it with a masonry cleaner, because soaking the wall pulls more salts to the surface.

Which cleaners harm limestone and marble cladding?

Acidic products etch calcium-based stone. Neutral or alkaline cleaners and low pressure keep the surface intact.

What time of day suits glass and metal panel washing?

Cooler morning hours, so the solution never dries on the surface, with the work finished before tenants arrive.

Services

Services this guide covers

Bundle any combination under one program, one schedule and one point of contact.

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