DISPATCH: ORRVILLE, OH • WAYNE COUNTY
SPEC SHEET: (330) 338-1833
Brick Power Washing
MORTAR INTEGRITY & CONSERVATION

Excessive wash pressure shatters historic lime joints and permanently pits exterior clay brick faces.

Power washing contractors uneducated in masonry chemistry frequently treat vintage brick as if it were poured concrete foundation slabs. Blasting a pre-1940 building with 3500 PSI water shears the protective kiln-fired outer skin of the brick and dislodges soft lime binder, requiring thousands of dollars in repointing. Our standards isolate binder chemistry and dictate exact pressure caps before water touches the wall.

BINDER CLASSIFICATION

The era of construction dictates the compressive strength and hydraulic resistance of exterior mortar joints.

VINTAGE LIME MORTAR Predominantly non-hydraulic or semi-hydraulic lime with coarse sand aggregate (pre-1940 structures). Compressive strength often below 350 PSI. Extremely soft, highly breathable, and susceptible to hydraulic erosion.
CLEANING STANDARD SOFT WASH ONLY (<100 PSI). High pressure is strictly prohibited. Cleaning relies on active biocidal solutions to dissolve biological colonization, followed by an open-bore flood rinse.
MODERN PORTLAND JOINTS Type N or Type S Portland cement and hydrated lime blends (post-1950 construction). Compressive strength between 750 and 1800 PSI. Capable of withstanding controlled mechanical wash pressure.
MAXIMUM ALLOWABLE PSI Modern dense brick: 1500 to 2500 PSI using 40-degree fan nozzles. Heavy industrial clinker paving: up to 4000 PSI.
PRICE BASIS High-pressure washing at $0.15–$0.50 / sq ft; low-pressure soft wash sanitization at $0.15–$0.30 / sq ft; minimum job trip charge $150.
Close-up detail of historic lime mortar joint between rough red clay bricks showing surface grain and structure
MACRO JOINT EVALUATION • SANDY LIME AGGREGATE TEXTURE TEST CRUMB RESISTANCE • 0.15–0.30 USD/SQ FT SOFT WASH THRESHOLD

FAILURE MODES & DAMAGE DYNAMICS

Understanding the physical consequences of improper contractor cleaning techniques on structural masonry assemblies.

KILN SKIN STRIPPING Clay bricks possess a dense vitrified outer crust formed during kiln firing. Pressures over 2500 PSI peel this skin away, exposing porous interior clay that absorbs water and crumbles in freeze-thaw cycles.
JOINT UNDERCUTTING Direct spray tips held close to lime mortar joints trench the sand binder out from behind the brick, creating moisture pockets that rust wall ties and saturate framing.
INTERNAL EFFLORESCENCE High water pressure forces hundreds of gallons deep into brick wall cavities. As this moisture evaporates outward, it draws sub-surface mineral salts to the face, forming stubborn white efflorescence blooms.
SPALLING CYCLE Water trapped behind a gouged brick face expands when frozen in Wayne County winters, causing entire faces of the brick to crack, delaminate, and shear completely off.
Ivan Petrov checking mortar joint depth and brick face condition with a measurement gauge
FIELD TECHNICIAN TESTING • SCRATCH RESISTANCE & DEPTH GAUGE IVAN PETROV FIELD AUDIT • OPERATING IN ORRVILLE SINCE 2021

PRESSURE THRESHOLDS & TOLERANCES

Engineering specifications dictating maximum allowable pressure, minimum standoff distance, and permitted tip profiles.

Masonry Substrate Mortar Era Max Allowable PSI Required Spray Tip Approved Delivery Method
Historic Soft Red Brick Pre-1940 (Lime) Under 100 PSI Brass Chemical Fan Low-Pressure Soft Wash Only
Weathered Wire-Cut Brick 1940–1970 (Transition) 800–1200 PSI 40° White Fan Tip Chemical Pre-Treat + Low-Rinse
Modern Extruded Brick Post-1970 (Portland) 1500–2500 PSI 40° or 25° Fan Tip Regulated High-Pressure Wash
Vitrified Clinker / Pavers Dense Industrial 2500–4000 PSI 25° Green Fan Tip Deep Surface Scouring
Crumbing / Spalling Mortar Any Era (Damaged) 0 PSI (Wash Denied) None Repointing Required Prior to Wash
OUR REFUSAL CRITERIA We will not power wash crumbling masonry where mortar has recessed more than 1/4 inch past the brick face. Blasting failed joints causes internal structural saturation. We mandate repointing before any wash is scheduled.
STANDOFF DISTANCE Nozzle tips must maintain a minimum standoff distance of 12 to 18 inches from the brick face. Holding tips within 6 inches causes localized hydraulic gouging regardless of pump settings.
ON-SITE AUDIT Specialist Ivan Petrov conducts a physical scratch test on every property in Orrville and Wayne County before writing an estimate. Review our equipment and rig specifications or see executed field results in our project registry.
ESTIMATE INQUIRY Call (330) 338-1833 or submit project dimensions directly via our written estimate desk. Standard minimum trip charge is $150 USD covering full inspection, containment, and verified testing.