Exterior Power Washing Services in Derry, NH

Dirt, mildew, and grime build up on siding, decks, and other exterior surfaces year after year, and it only gets harder to remove the longer it's left alone. Painting By Eli provides power washing services throughout Derry, New Hampshire, and the surrounding region, whether as a standalone service or as prep work before an exterior paint job. Call (603) 425-1851 to schedule a free estimate and see what a proper cleaning can do for your property.

Person power-washing a wet wooden deck beside a green lawn
Person pressure-washing a gray siding wall with a hose and spray nozzle

Surfaces That Benefit From Power Washing

Power washing covers a lot more than a dirty driveway. Painting By Eli's exterior cleaning services address:



  • Vinyl, wood, and other siding materials
  • Decks and outdoor wood structures
  • Walkways and other exterior hardscaping
  • Surfaces prepped ahead of an exterior paint job
  • Mildew and algae buildup in shaded or damp areas
  • Years of accumulated dirt and grime that dulls a property's appearance

Power Washing as the First Step in Exterior Painting

A fresh coat of exterior paint only holds up as well as the surface it's applied to. Paint applied over dirt, mildew, or chalky buildup won't adhere properly, no matter how good the paint itself is. That's why power washing is often the first step in Painting By Eli's exterior painting process, ensuring the surface is clean and ready before any primer or paint goes on. For clients who just want a cleaner-looking exterior without a repaint, power washing works just as well as a standalone service.

Pressure washing a dirty white wall with a black spray wand

Why Choose Painting By Eli for Power Washing

Person in white boots pressure-washes a concrete surface with a red nozzle.
Person pressure-washing a wooden porch beside stacked steps and a black grill-like unit

Nearly 40 years of experience working on New England exteriors

Fully insured, with a Home Improvement Contractor registration on file

Power washing available as a standalone service or as paint prep

Careful attention to pressure and technique so delicate surfaces aren't damaged

Experience with a wide range of siding and exterior materials

Free estimates for cleaning projects of any size

Direct work by Eli and his trained crew, with no subcontracting out

Person pressure-washing a house exterior with a hose wand
Pressure washing beige siding next to a window

Residential and Commercial Exterior Cleaning

Power washing services extend to both homes and commercial properties, from a single-family house to a larger commercial building's exterior. Whether it's routine maintenance or preparation for a bigger painting project, the same careful approach applies to every job.

Frequently Asked Questions About Power Washing

  • How often should a home's exterior be power washed?

    Most homes benefit from power washing every one to two years, though homes in shaded or damp areas prone to mildew may need it more frequently.

  • Can power washing damage my siding or wood surfaces?

    When done correctly, no. Pressure and technique are adjusted based on the surface material to avoid stripping paint or damaging wood.

  • Is power washing necessary before every exterior paint job?

    Yes, in most cases. A clean surface is essential for paint to adhere properly and last as long as it should.

  • Do you power wash decks and walkways as well as siding?

    Yes, decks, walkways, and other exterior hardscaping are all part of the power washing service.

  • How long does a typical power washing job take?

    Most residential jobs are completed within a few hours, depending on the size of the property and the surfaces involved.

Schedule Your Power Washing Estimate

Whether it's routine exterior maintenance or prep work before a paint job, call or text (603) 425-1851 to schedule a free power washing estimate with Painting By Eli, serving Derry, NH, and communities throughout New Hampshire and Massachusetts.