AllStar Window Cleaning - Home Cleaning | Thornton, PA

Locally & Family Owned & Operated

Fully Licensed, Bonded & Insured

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Over 4,000 repeat & happy customers

Our team has been cleaning southern Pennsylvania and northern Delaware homes for nearly 17 years. Call us today and let us continue our legacy of fantastic work.

Don't let anyone else handle your roof

Our roof cleaning services will extend the life of your roof and restore curb appeal to your home. Our cleaning process is able to remove black streaks, lichen, and algae, keeping your roof healthy.


We never pressure wash your roof, nor do we use heavy equipment. We always use affordable and sensible solutions when it comes to cleaning.

Our services include:

We look forward to serving you and your family for years to come. 610-459-3425

  • Roof Cleaning

  • Gutter Cleaning

  • Window Cleaning

  • Soft Pressure washing of exterior surfaces

Why choose our company?

  • Nearly 17 years of cleaning experience

  • No cutting corners

  • Locally owned and operated

  • College educated in business

  • Able to work on homes and businesses



Big Picture: Can You Identify What's Growing on your Roof?"

Algae Growth

Algae Growth

  • Extensive algae growth.

  • Different colors are evident.

  • Dark appearance is due to a protective layer the algae have developed to protect itself from damaging UV rays.

Algae, Lichen and Moss

Algae, Lichen, Moss

  • Evident are Lichen, Moss & Algae.

  • Notice the vent metal has inhibited growth. This observation is what initially prompted researchers into finding metals that prevent algae growth to take place.

  • Exposure: Note the algae-free surface on dormer roof.

Algae Growthh

Algae Growth

  • Extensive algae growth

  • The area below the window is free of algae due to the run-off of the metal flashing used at the roof-to-wall transition.

  • Algae preodminantly grows from the bottom - up, due in part to the amount of time water is on the roof.

Lichen and Fungus Growth

Lichen & Fungus Growth

  • Fungus has predominantly taken root at the shingle edges and keyways.

  • Left to grow, this may eventually damage the shingles by lifting them and further inhibiting water run-off.



  • Moss is due partly to low slope, shady location, organic material & exposure.

  • Water is retained on the roof longer than normal; thus essentially aiding the growth.

  • Organic material needs to be present for growth or moss cannot take root.

Algae Staining On Shingled Roof Surfaces

What Are Those Black Stains On the Roof?

Those black stains are Algae. Algae appear as dark stains on shingles that usually cover more area on the lower section of the roof and taper as they reach the ridge.

How Does A Roof Get Algae?

Algae spread from one infected roof to another via airborne spores. These spores land randomly on a roof and take root. A protective sheath creates the dark color the algae forms to protect itself from UV rays

How Does it Grow?

Algae require moisture and proper temperatures to grow. Dew is the primary moisture source. Algae are found predominantly in the Southeast, but it can and will grow nationwide. The algae generally grow on the northern exposures of the roof since this exposure generally receives less sunlight. Algae are well adapted to extreme conditions.

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