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Roof Cleaning Issues-Get Answers about Stains

Why Are There Black Stains on my Roof?Algae is the primary culprit behind the black streaks on your shingles. You’ll usually find it close to the ridges.
Where Does Algae Come From?Algae spreads through flying spore thats usually come from algae growths on neighboring roofs.
How Does Algae Grow and Expand?Moisture and the right temperature range are the two things algae needs the most. Unfortunately, both of those are in high supply in the Western Coastal areas. North-facing roofs are known to be particularly susceptible to algae growth.
How Can I Protect My Roof?1. Algae-resistant shingles can be installed as a replacement. These shingles are more resistant to algae growth.2. Pressure cleaning is very effective at removing algae, and additional treatments can be applied to the roof after the cleaning to inhibit new growth.
What Shouldn’t I Do?1. Aged shingles should NEVER be power washed. This rough treatment can damage your roof. Safer steam cleaning is the better option.2. You should never attempt to walk over your roof without the proper fall protection. If you’re not sure what that is, then you should let a professional handle the job for safety.

 

The Facts about Your Roof and The Things Growing on It

QuestionAlgaeFungusMossLichen
What Does it Look Like?It appears as green and black stains. It may be called “Gloeocapsa Magma”, “Cyanobacteria”, or “Blue-Green Algae”It appears as spongy green clumps. It may look similar to mold and mildew.If it’s green and spongy, but not algae or fungus, it’s likely moss.Lichen typically appears in a star position in a range of colors including orange, yellow or white.
What Does it Need to Grow?Algae prefers inorganic food sources like asphalt fillers. To thrive, it needs moisture and cool temperaturesThese growths get their food from the soil. They also need the right temperature range to thrive
Where Do These Growths Occur?Algae occurs all over the nation, particularly on in areas with high humidityThese also like high humidity, but they’re particularly vigorous under shade or tree cover.
Typical Roof Exposure?Roofs that are facing the north are the most susceptible.Any roof is susceptible to these growths.
Impact on Roof?Algae is not dangerous to your roof, but does look disgusting.These growths can worsen the appearance and defenses of your roof. It should be removed immediately.
Do Algae-Resistant Shingles Work?YesWhile effective against algae, these shingles are not effective against these growths.
How Do I Make it Go Away?Using an Anti-Algae solution on the roof is an effective solution1. The clumps can be removed, which will hinder growth.2. Anti-Algae solution may be effective in some cases.

 

Algae: Facts & Fiction

Fact:Algae spreads by the use of airborne spores. The spores can travel easily between the roofs of nearby houses.
Fact:Algae can survive in many different conditions and climates, even extreme ones.
Fact:The color of the algae comes primarily from the dark green sheath that each cell produces to protect itself from the sun.
Fact:Mold can be inhibited by copper and Zinc. Copper is much more effective against algae than zinc.
Fact:Algae gets most of its water from dew.
Fact:Algae can survive long dry and hot periods, though it is dormant during the winter. Algae can be difficult to remove due to the material it secretes on surfaces.
Fiction:Copper is immediately effective against algae. FACT: The Copper poisons the algae over time.
Fiction:Algae is a fungus. FACT: Algae is in the Eubacterial family. It is not a fungus.
Fiction:Adding copper ridges to your roof will kill any colonies there. FACT: Copper has never been demonstrated to completely destroy a colony.
Had a job in a sketchy part of town, for a dirty and difficult clean. The people at North Shore were very helpful, the technician did a great job, and we are very happy with the way it all turned out. Everything was handled professionally and skillfully. I'm thrilled with the result. Will happily recommend them to anyone
Daniel Jones
Daniel Jones
19:55 14 Aug 18
Quick response, easy to deal with and quality work. I highly recommend them. They did a great job!
James Palmer
James Palmer
15:05 14 Sep 18
They did a great job for the downpipes replacement, it looks awesome and professional. There were a small issues for one of the downpipes, they came back the next day and changed a new one for me after I called them. The price is reasonable and the material is a great quality, the installers are their own guys, not subcontract. I am happy about my experience.
Mingwei Liu
Mingwei Liu
06:18 09 Jun 18
North Shore has taken care of a great deal of our maintenance and they always do a great job. Service is fantastic and there have never been any issues with them returning if we needed a touch up after a service. Pricing is always fair and scheduling always on point.
Jooles Dub
Jooles Dub
00:42 04 Jul 18
I have been using this service on behalf of our townhouse complex in Burnaby for the past 3 years. Roof cleaning, gutter repair, and other roofline repairs and maintenance have all been done promptly, quickly and carefully. It was worth it to search for this company and this result, as we have been treated poorly by other more local companies. Prices are reasonable despite the extra travel they do to get here. Invoices and responses to requests are always reliable.
Eric Mulholland
Eric Mulholland
16:27 20 Sep 18
I have switched to North Shore Home Services because of the over the top customer service. Everyone from the men who came to do the repairs to the man in charge of customer service was as professional and understanding as is possible. Best of all, they fixed the leak!! I will recommend these people and call them whenever is necessary.
suzetteccc
suzetteccc
22:02 27 Dec 18

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