Real Estate Agent with Jeffrey Hogue Realtor Group RS201518L


No matter how high my cherry picker can go or how good my camera and photographic skills are, I cannot overcome problems with a home. Especially if they are very large and noticable.

More and more I notice black streaks on asphalt roof shingles. It is mostly on Berks County homes that have north facing roofs. The home may be grand, the landscaping perfect but the roof looks worn and dated.

I started to look for answers and found a company called Shingle Roof Cleaning, LLC. It was and is quite appropriately named. I spoke to one of the owners, Ken Laity, and he explained what was happening.

Ken stated the following…”Black stains on asphalt shingle roofs are Algae. Gloeocapsa Magma is the scientific name given to this bluish green air born algae. Algae floats through the air like pollen. It lands on your roof and feeds on the crushed limestone filler the shingle manufactures put in the shingles for weight.

In the late 70′s and early 80′s, petroleum prices rose significantly. Petroleum prices drastically increased forcing the shingle manufacturers to find a cheaper alternative and use crushed limestone as the primary filler for weight.
15-Fox-Hollow-Road-11This limestone is a natural food source for algae, moss, and lichen to feed on. The stains are black because algae feed on the crushed limestone in the summer and get a black protective shell in the winter.

The following year, more algae land on your roof and the whole process starts over. It takes about seven to ten years for the algae to accumulate so much that the heavy rain will push the dead algae cells down the roof, causing the black streaks.”

I introduced Shingle Roof Cleaning, LLC to several of my customers who had issues with the look of their roof. The transition was amazing. The homes went from average to WOW!

For more about the algae removal process visit their web site at or call them at 484-388-1689.

When you put so much effort into your home and make it look just like you want it to, it just makes sense to consider how the roof looks. The roof is one of the largest and most important parts of any home. It does more than keep you dry. It could be the difference between getting TOP value or not.

Jeffrey C. Hogue

Comments (0)