NWI Pressure Washing | Professional exterior cleaning in Northwest Indiana
Professional roof cleaning service in Northwest Indiana by NWI Pressure Washing
Roof Cleaning

Restore Your Roof Without the Risk

Remove black streaks and moss without high pressure.

All Services

Restore Your Roof Without the Risk

Those dark streaks running down your roof aren't just ugly — they're a colony of Gloeocapsa magma, a cyanobacteria that feeds on the limestone in your shingles. Left untreated, it shortens your roof's lifespan by years. Our soft wash roof cleaning process uses zero high pressure, applying a specialized solution that eliminates the bacteria and restores your roof's clean, original color — 100% compliant with shingle manufacturer guidelines.

Our roof cleaning process is 100% no-pressure and manufacturer-approved — never voiding your warranty.

Why Choose Us

  • Zero high-pressure contact — protects shingle granules and warranty
  • Eliminates Gloeocapsa magma (black streak algae) at the root
  • Removes moss, lichen, and green algae growth
  • Extends roof lifespan by 5–10 years on average
  • Improves energy efficiency by restoring reflective roofing color
  • Endorsed by ARMA (Asphalt Roofing Manufacturers Association) guidelines

Our Process

1

Ground-level roof inspection using high-resolution photos

2

Protect gutters, downspouts, and landscaping below the roofline

3

Apply our ARMA-compliant soft wash solution via low-pressure pump

4

Allow proper dwell time for the solution to neutralize organic growth

5

Light rinse if needed — most treatments require no rinsing at all

6

Document before-and-after results for your records

Common Questions

Roof Cleaning FAQ

How much does roof cleaning cost in Indiana?+

Roof cleaning in Northwest Indiana typically ranges from $250 to $600 depending on roof size, pitch, and the severity of algae or moss growth. We provide free on-site estimates so you know the exact cost before we start.

Will pressure washing damage my roof shingles?+

High-pressure washing absolutely can damage shingles — that's why we never use it. Our soft wash process applies cleaning solution at low pressure, killing algae and moss at the root without disturbing shingle granules or voiding your manufacturer warranty.

How often should I clean my roof?+

In Northwest Indiana, we recommend roof cleaning every 2 to 3 years. Our humid summers accelerate algae growth (those black streaks are Gloeocapsa magma bacteria), so regular cleaning prevents premature roof replacement.

What are the black streaks on my roof?+

Those dark streaks are caused by Gloeocapsa magma, a type of cyanobacteria that feeds on the limestone filler in asphalt shingles. It's not just cosmetic — left untreated, it shortens your roof's lifespan by years.

Is soft washing safe for all roof types?+

Yes. Soft washing is the manufacturer-recommended cleaning method for asphalt shingles, metal roofing, tile, and cedar shake. It uses no high pressure, relying instead on a biodegradable cleaning solution to do the work.

Ready to Get Started?

Get a fast quote for roof cleaning today.