Pressure Washing in Waterloo

Abraham Erb settled in Waterloo where there was enough water power to run mills. His sawmill was working in 1808 and his grist mill in 1816. Pressure washing borrows the same idea. Water under force does real work. That helps on a driveway and hurts on a soft surface, so the first question is always what the surface can take.

Poured concrete that has been through many winters can scale, which means the top skin flakes away after repeated freeze and thaw and road salt. Strong pressure lifts more of it. We test a corner and drop the setting where it flakes. Interlock is different. Pressure can blast the sand out of the joints, so the stones shift and weeds move in. Topping up the joint sand afterward is separate work, and we put it in the quote.

Shaded walks stay damp and go green over summer, and salt leaves a white film in spring. Both lift well from sound surfaces. Rust marks from furniture or metal edging need their own treatment. Pressure washing starts from $350. Tell us about steps, edging and any wood decking, since wood needs a gentler setting again.

What we plan for in Waterloo

• Corner test: we start in an unnoticed corner and watch for flaking or grit coming up before we work across the whole surface.
• Joint sand: on interlock we watch the joints as we go, and note where sand needs topping up afterward.
• Scaled concrete: where the top layer is flaking we lower the pressure, and tell you what will and will not improve.
• Edges and steps: we take extra care where concrete meets brick, stone or wood, since those edges lift first.
• Runoff: we send rinse water toward the lawn or street side, away from the garage door and basement window wells.

Questions from Waterloo homeowners

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