Brick, terracotta, and stone facades reward gentle, method-appropriate cleaning and punish the pressure-washing and harsh-chemical approaches that work fine on concrete.
Vancouver's older commercial stock — Gastown, Chinatown, parts of the Downtown Eastside and South Granville — includes load-bearing brick, terracotta cladding, and cut-stone detailing dating from the early 1900s through the 1920s. These materials are more porous than modern concrete or precast, often laid with softer lime-based mortar that was designed to flex and sacrifice itself ahead of the brick. That combination means the material assumptions that hold for a 1990s concrete tower — high-pressure rinse is fine, aggressive detergent is fine — don't transfer. What looks like a straightforward facade clean can, done wrong, drive moisture into the wall assembly and accelerate spalling, efflorescence, and mortar joint failure that costs far more to repair than the cleaning saved.
The other practical difference is regulatory: many of these buildings carry a municipal heritage designation or sit in a heritage conservation area, which can require approval for anything beyond routine, non-invasive cleaning.
Most heritage buildings in Vancouver's older commercial cores are low- to mid-rise, so ground-supported access — swing stage from a low roof, boom lift where street clearance allows, or rope access where roof anchors exist — covers most of the work. Narrow lanes and heritage streetscapes often restrict lift footprint, which pushes work toward rope access or scaffold. Any scaffold or lift setup adjacent to a heritage facade should include padding or standoffs to avoid contact damage to decorative cornices, ledges, or terracotta detail.
| Material | Safe method | Avoid |
|---|---|---|
| Soft historic brick | Soft washing, low-pressure rinse under ~800 psi | High-pressure washing, wire brushing, sandblasting |
| Lime mortar joints | Gentle rinse, biocide where needed, hand detailing | Acidic cleaners not formulated for masonry |
| Terracotta cladding | Soft washing, neutral-pH detergent | Abrasive pads, high-pressure rinse near glazed surfaces |
| Cut stone / cast stone | Low-pressure rinse, poultice for stains where warranted | Strong acids that etch or dissolve calcareous stone |
Heritage buildings are often mixed-use with active ground-floor retail in narrow, pedestrian-heavy streetscapes. Scaffold or lift footprint needs to be coordinated with the municipality if it encroaches on the sidewalk, and retail tenants need advance notice if entrances will be partially blocked. Work is usually scheduled for early morning before foot traffic picks up, and biocide or cleaning runoff needs containment to avoid staining the sidewalk or affecting neighbouring storefronts.
Specify the exact substrate per elevation (brick, terracotta, stone, mixed), the cleaning method and maximum pressure allowed, any biocide or chemical products by name with masonry-safe confirmation, condition documentation requirements (photograph existing spalling, cracking, or efflorescence before work begins so pre-existing damage is on record), and a clause requiring the contractor to stop and flag any active water infiltration or structural concern found during the work rather than cleaning over it.
Generally no, not at the pressures used on concrete or hardscape. High-pressure water forces moisture into porous brick and mortar, accelerating spalling and freeze-thaw damage. Soft washing or low-pressure rinse methods are the standard approach for cleaning historic masonry.
No. The limits are about the material — soft, porous brick, lime mortar, and terracotta behave the same whether or not the building carries a formal heritage designation. Designated buildings often add a layer of municipal approval requirements on top of the material limits, but the cleaning method should be chosen based on substrate either way.
Municipal heritage planning departments (for example, the City of Vancouver's Heritage Conservation program) typically require a permit for work that alters a designated building's exterior appearance. Routine cleaning generally doesn't require this, but repointing, coating removal, or any treatment that changes the surface finish usually does — check with the municipality before specifying a method.
The low-pressure method used on masonry, EIFS, and painted concrete.
Read more →Efflorescence, soft washing, downstreaming, and other terms defined.
Read more →Get a heritage-appropriate scope and price for your facade.
Read more →Send photos of the facade and mortar condition and we'll recommend a method that won't accelerate deterioration.