Power washing vs pressure washing?

What's the difference between power wash and pressure wash?

Power washing can mean heated-water cleaning; pressure washing can mean unheated cleaning, but the labels alone do not specify a method. Kärcher’s home-washer guidance sets a 104℉ water limit. Ask whether the proposed equipment heats the water, then identify the material and stain. Source read 9 November 2026.

Source: Kärcher, Concrete Masonry & Hardscapes Association

Heat is a separate choice from spray force. CMHA’s 2005 concrete masonry guidance describes heated water for greasy surfaces and warns that high pressure can damage masonry. A bid that only says “power wash” leaves both the water temperature and the surface treatment unclear.

Is power washing the same as pressure washing?

Power washing and pressure washing are overlapping service labels. Define the difference in the written proposal: heated or unheated water, surface pressure, nozzle and cleaning agent. CMHA’s 2005 concrete masonry guidance specifies a wide tip and a 12-inch minimum standoff, regardless of the service name. Source read 9 November 2026.

Source: Concrete Masonry & Hardscapes Association

A cold-water machine should not be treated as a hot-water machine by connecting a hot supply. Kärcher states that hot water from a water heater damages its residential pressure-washer pump. The equipment specification must support the proposed method.

Is power washing concrete bad?

Power washing can damage concrete masonry when pressure is excessive. CMHA’s 2005 concrete masonry wall guidance limits pressure to 400 to 600 psi and warns of appearance changes. Those wall-cleaning limits do not establish a universal setting for poured driveways; identify the concrete product and condition first. Source read 9 November 2026.

Source: Concrete Masonry & Hardscapes Association

Heated water may help with greasy concrete masonry, according to CMHA (2005). That does not make a hotter or stronger spray suitable for every slab, coating or joint. Ask the contractor to name the material instructions used and show a test area before treating the whole surface.

Is power washing bad for your house?

Power washing can harm vulnerable house surfaces when the spray exceeds the material’s tolerance. CMHA’s 2005 guidance requires at least 12 inches of nozzle separation in its concrete masonry wall guidance and warns about damage from high pressure. Ask for surface-specific instructions rather than one treatment for the entire house. Source read 9 November 2026.

Source: Concrete Masonry & Hardscapes Association

Historic masonry needs particular care. In its 2010 oil-contamination cleanup guidance, NPS warns that even 200–500 psi may be excessive for some materials. That preservation context cannot be turned into a universal setting for every wall or modern siding product. Source read 9 November 2026.

Can you pressure wash brick house?

A brick house needs a method matched to the masonry’s condition. NPS’s 2010 historic oil-cleanup guidance calls for a 36-by-36-inch test patch and warns that 200–500 psi can be excessive for some materials. Ask for a preservation assessment where historic brick or mortar is involved. Source read 9 November 2026.

Source: National Park Service

The same NPS oil-cleanup guidance specifies at least 18 inches of nozzle distance and warns that pressure washing can drive contamination deeper into a material. Those are scoped oil-cleanup cautions, rather than instructions for routine whole-house brick washing. Source read 9 November 2026.

What should an exterior washing scope include?

An exterior washing scope should distinguish heated from unheated water and name every surface being treated. CMHA’s 2005 concrete masonry guidance specifies 400 to 600 psi and a wide tip; these are material-specific examples of details a proposal should spell out. Source read 9 November 2026.

Source: Concrete Masonry & Hardscapes Association

Surface list: separate concrete masonry walls, brick, paving and coated areas so the contractor can state the applicable care instructions for each.

Stain list: identify greasy deposits separately from routine dirt; CMHA’s 2005 guidance describes a use for heated water on greasy masonry.

Temperature: record whether water is heated and confirm that the machine supports it; Kärcher’s residential example limits feed water to 104℉.

Pressure: record the proposed setting and its material basis; CMHA’s 2005 wall guidance uses 400 to 600 psi.

Nozzle and distance: name the spray tip and standoff; CMHA’s 2005 guidance specifies a wide tip and at least 12 inches for concrete masonry.

Test area: identify a discreet sample and how the result will be judged before full cleaning; NPS’s historic oil-cleanup example uses 36 by 36 inches.

Contamination: identify oil contamination before washing; NPS warns that pressure can move chemicals deeper into historic material.