Power Washing and Roof Cleaning Forum

Patrick G · Approved Exterior Cleaner

Angies list should remove this article......

waxman18324 · Founding Member Rest in Peace

Pat,

Unfortunately, fighting with Angie's List on our level will be an exercise in futility. These fights have to be addressed by the shingle manufacturers. Fighting with Poo Shampoo will only bring legal issues. I'm sure Ed T. could shed some light on this from some past experiences.

Hank

Patrick G · Approved Exterior Cleaner

I can't get this as a comment, I fill it out but there is no send button. Ifd anyone could help me I would appreciate it.

Both responses so far have been excellent! The person writing this article contradicts herself so let me explain.

1} This company owner claims to use environmentally friendly products but does not disclose them.
The roof shingle manufactures recommend using a bleach based solution. Again we know bleach is used in our drinking water,wash and laundry every day. Bleach is bio degradable cleaner breaking down back into salt. Again we have no information on this writers chemicals.

2} The writer claims that their "cleaners " instantly clean the roof and then the roof is washed down.
This is false, if the cleaners were instant and able to do the job alone there would be no need to rinse down the roof when they were finished. This company uses a surface cleaner to "rinse "down the roof, this surface cleaner is attached to a Power washing machine, a power washer is used to " Increase water pressure " the worker is then lowering and raising this surface cleaner up and down the roof shingles putting himself and the home owner at risk. Without the use of the surface cleaner the roof would not "Come Clean "

3} With the proper use of cleaning the roof with bleach all the parasites die that moment, the black streaks are gone, any moss or lichen is left behind on the roof having been killed. Forcing off the lichen or Moss even with garden hose pressure removes these parasites along with the granules under them. The moss and lichen die,decay releasing the grip on the granules and fall off usually within six weeks.

4} This writer suggests a yearly maintenance on the roof, why? Because the roof will barley stay algae free a year let alone two. Most roofs cleaned with bleach stay clean at least four or five years.

5} All roof's cleaned with bleach are inspected, walking on any roof esp. a wet one should be frowned upon. This puts the worker and home owner at risk.

6} Properly mixed the bleach cleaned roof does not have an over whelming odor, properly applied the cleaner should remain on the roof with little run off at the down spout.

7} All my customers are aware Bleach is used, it is recommended by the shingle manufactures. Again handled properly the bleach solution kills what is on the roof, watering below protects plant life on the ground.

8} This writer response to Power washing a roof. Here they frown on a power washer but they use one? Thier product cannot clean your shingles alone, not even with just a garden hose. They need pressure greater then that to "Blast off "everything. I once read a power washer on a roof is like a category four hurricane.

Pros: Can't think of any.

Cons: Not only is this method damaging to shingles, but it's also not an effective way to remove organisms that cause roof stains. The high-pressure power washing method leaves root systems behind, so the algae will often return rather quickly.

Tip: If you're not sure if the contractor will be using damaging high pressure, ask him to hold his hand under the spray. If he can't do that, then the pressure is too high and can damage your shingles.

Here is a video of a bleach cleaned roof that is instant and no rinsing:

youtu.be/hxTJXXVEioE

Art O · Approved Exterior Cleaner

Patrick G wrote:
I can't get this as a comment, I fill it out but there is no send button. Ifd anyone could help me I would appreciate it.

Both responses so far have been excellent! The person writing this article contradicts herself so let me explain.

1} This company owner claims to use environmentally friendly products but does not disclose them.
The roof shingle manufactures recommend using a bleach based solution. Again we know bleach is used in our drinking water,wash and laundry every day. Bleach is bio degradable cleaner breaking down back into salt. Again we have no information on this writers chemicals.

2} The writer claims that their "cleaners " instantly clean the roof and then the roof is washed down.
This is false, if the cleaners were instant and able to do the job alone there would be no need to rinse down the roof when they were finished. This company uses a surface cleaner to "rinse "down the roof, this surface cleaner is attached to a Power washing machine, a power washer is used to " Increase water pressure " the worker is then lowering and raising this surface cleaner up and down the roof shingles putting himself and the home owner at risk. Without the use of the surface cleaner the roof would not "Come Clean "

3} With the proper use of cleaning the roof with bleach all the parasites die that moment, the black streaks are gone, any moss or lichen is left behind on the roof having been killed. Forcing off the lichen or Moss even with garden hose pressure removes these parasites along with the granules under them. The moss and lichen die,decay releasing the grip on the granules and fall off usually within six weeks.

4} This writer suggests a yearly maintenance on the roof, why? Because the roof will barley stay algae free a year let alone two. Most roofs cleaned with bleach stay clean at least four or five years.

5} All roof's cleaned with bleach are inspected, walking on any roof esp. a wet one should be frowned upon. This puts the worker and home owner at risk.

6} Properly mixed the bleach cleaned roof does not have an over whelming odor, properly applied the cleaner should remain on the roof with little run off at the down spout.

7} All my customers are aware Bleach is used, it is recommended by the shingle manufactures. Again handled properly the bleach solution kills what is on the roof, watering below protects plant life on the ground.

8} This writer response to Power washing a roof. Here they frown on a power washer but they use one? Thier product cannot clean your shingles alone, not even with just a garden hose. They need pressure greater then that to "Blast off "everything. I once read a power washer on a roof is like a category four hurricane.

Pros: Can't think of any.

Cons: Not only is this method damaging to shingles, but it's also not an effective way to remove organisms that cause roof stains. The high-pressure power washing method leaves root systems behind, so the algae will often return rather quickly.

Tip: If you're not sure if the contractor will be using damaging high pressure, ask him to hold his hand under the spray. If he can't do that, then the pressure is too high and can damage your shingles.

Here is a video of a bleach cleaned roof that is instant and no rinsing:

youtu.be/hxTJXXVEioE

HERE"S CHARLIE!!!

John Aloisio · Approved Exterior Cleaner

Doug R. Had a nice reply, and someone who was anonymous.

Patrick G · Approved Exterior Cleaner

I didn't even see that was Doug, it was a good response.

Jeff Thompson · Approved Exterior Cleaner

I just tried to post my thoughts as well and it didn't show up. I'm thinking everything is screened before it gets posted. Maybe in a day or so, if it's not deemed to damaging to the author or AL's reputation they might let get posted.

waxman18324 · Founding Member Rest in Peace

Our own Brett Thompson of Blue Ridge Roof Cleaning wrote an article, for Anglie's List, and it was published on Feb 25, 2013. Here is a link to his (http://www.angieslist.com/articles/how-do-i-remove-black-streaks-my-roof.htm).

Hank

Jeff Thompson · Approved Exterior Cleaner

Cant get the link to work Hank.

waxman18324 · Founding Member Rest in Peace

How do I remove black streaks on my roof?

Cleaning a roof with a low-pressure chemical treatment can remove black streaks and discoloration. (Photo courtesy of Blue Ridge Roof Cleaning of Virginia)

Date Published: Feb 25 2013

Submitted by Brett Thompson of Blue Ridge Roof Cleaning of Virginia

For some of us, the black streaks or stains we see on asphalt shingles is something relatively new. When we were younger we didn't see this eye sore, waiting to make our home look unsightly, inviting more fungi and plant matter to attach itself to the shingles and cause damage if left alone. These black streaks are calledgloeocapsa magma, or GM, more commonly called mold or fungus. This cyanobacteria is a bacteria that get their strength to survive through photosynthesis and the limestone filler found in the composition of shingles.

In the past, shingles were constructed using felt and asphalt. Now that shingle composition has changed to mostly fiberglass and limestone, the GM blue-green algae thrives, using the limestone as their source of food. Why is it black and only found on the north- and east-facing sides of the roof? GM has the ability to form an outer coating, protecting it from UV rays. When there is no light or low light, GM has a blue-green color. GM’s other self-protective factor is that it enjoys the cooler, shady areas of the roof where moisture is usually present.

There is very little information as to the damage GM in itself will cause to roofing materials. Some state it is only an aesthetic problem while others state it causes damage. Both The American Roof Manufactures Association (ARMA) and Canadian Asphalt Shingle Manufacturers Association (CASMA) state that GM is only an aesthetic issue, giving a home poor curb appeal. One thing is certain, however, roofs with GM can attract other life forms that do cause damage.

When algae and fungus get together, they form something new, lichen. Lichen is a photosynthetic fungus that has roots that wrap around the granules, feeding on the nutrients of the GM and the filler in the shingles. Once on the roof, lichen cannot easily be removed. Even if it dries out, it can come back to life when rain or moisture appears. Scrubbing or power washing the lichen will only do more damage. Another organism growing on your roof is moss, which is a plant, not a fungus or algae. Moss aides in shortening the life span of your roof because it retains moisture and in cold climates can freeze, causing damage to the shingle and granules.

When you’re trying to decide whether to clean your roof or have a professional perform the cleaning, keep a few things in mind. Roof cleaning is not a DIY project. Some homeowners might want to tackle this project but without proper training and equipment, the end result could be a disaster.

ARMA, CASMA and the asphalt roof manufacturers state that shingles should not be cleaned using a high-pressure washing system. Professional roof cleaners have special equipment and most will clean the roof in the same manner as suggested by roof manufacturers: a low-pressure chemical treatment. A roof cleaning can remove black streaks or other discoloration for a fraction of the cost of replacement.

About this Angie’s List Expert: Brett Thompson is the owner of Blue Ridge Roof Cleaning of Virginia, a company that offers services including low-pressure roof cleaning, residential pressure washing, and deck and fence cleaning and sealing. The company is also a member of the Professional Roof Cleaners Association.

As of Feb. 25, 2013, this service provider was highly rated on Angie's List. Ratings are subject to change based on consumer feedback, so check Angie's List for the most up-to-date reviews. The views expressed by this author do not necessarily reflect those of Angie's List.

Patrick G · Approved Exterior Cleaner

You see he gives a reasonable article, the roof shampoo lady article is slanted to her side.

waxman18324 · Founding Member Rest in Peace

Pat,

There are many other articles on AL that are written by members of our industry. AL lists them at the bottom of most articles. They let the educated consumer, who is our best customer, make the right decision.

Hank

Art O · Approved Exterior Cleaner

Screw Angie!

BlueRidge · Approved Exterior Cleaner

I will attempt something tomorrow. I worked with a guy while putting together my article. I will give him a call and ask some questions about roof shampoo. I will also take a better look at Angie herself discussing roof cleaning in her own video. It never hurts to ask. Hell, the worst thing they can do is say no.

Hanks, thanks for posting that. I really tried to write it with fact and not what I believe to be true for only my company. My goal was to make things easier for those who are cleaning roof properly.

Here's my picture again... just for her!

waxman18324 · Founding Member Rest in Peace

Brett,

I'm going to borrow that photo.

Hank

Jeff Thompson · Approved Exterior Cleaner

Here's a link to an article Angie herself wrote......in it she advises against the use of high pressure and is an advocate of a chlorine based mixture for cleaning.

www.plymouthprowash.com/_img/angies-list.pdf

BlueRidge · Approved Exterior Cleaner

Hank and anyone else, help your self to the "roof rover" photo.

I remember some time ago either Doug or AC mentioned the psi it takes to spin a surface cleaner (roof rover). My feeble memory says 800 psi. Does anyone know? If so, 800 psi 3 inches from the roof surface isn't high pressure?

Eric Schnaible · Approved Exterior Cleaner

Angie's list is obviously just a 'for profit' business. They churn out contradictory information that is not in the best interest of the consumers (mainly elderly people) that unfortunately believe their pitch. The fact that they have published contradictory information doesn't mean anything to to them, they are probably not even aware of it. Bottom line is, it's content, and that's good for business.

Ed Thompson · Approved Exterior Cleaner

I talked to my rep, haven't heard back. Probably not much she could do. I think the article will make much of a difference. They're easy to sell against, and they are more expensive. I tried to respond twice with two different emails over 24 hours ago and have not seen my comments.

John Aloisio · Approved Exterior Cleaner

brett,

most surface cleaners are at least 1000 psi and 1.5 gallons per minute at a minimum. I know that most of the 20" plus ones are higher. Usually 2000 psi and 2-4 gallons per minute. The larger the most power needed. And I'm pretty sure they use a 24" on their units.

BlueRidge · Approved Exterior Cleaner

John Aloisio wrote:
brett,
most surface cleaners are at least 1000 psi and 1.5 gallons per minute at a minimum. I know that most of the 20" plus ones are higher. Usually 2000 psi and 2-4 gallons per minute. The larger the most power needed. And I'm pretty sure they use a 24" on their units.

Thanks John! That is good information to have.

Maverick Contracting · Approved Exterior Cleaner

Patrick G wrote:
I can't get this as a comment, I fill it out but there is no send button. Ifd anyone could help me I would appreciate it.

Both responses so far have been excellent! The person writing this article contradicts herself so let me explain.

1} This company owner claims to use environmentally friendly products but does not disclose them.
The roof shingle manufactures recommend using a bleach based solution. Again we know bleach is used in our drinking water,wash and laundry every day. Bleach is bio degradable cleaner breaking down back into salt. Again we have no information on this writers chemicals.

2} The writer claims that their "cleaners " instantly clean the roof and then the roof is washed down.
This is false, if the cleaners were instant and able to do the job alone there would be no need to rinse down the roof when they were finished. This company uses a surface cleaner to "rinse "down the roof, this surface cleaner is attached to a Power washing machine, a power washer is used to " Increase water pressure " the worker is then lowering and raising this surface cleaner up and down the roof shingles putting himself and the home owner at risk. Without the use of the surface cleaner the roof would not "Come Clean "

3} With the proper use of cleaning the roof with bleach all the parasites die that moment, the black streaks are gone, any moss or lichen is left behind on the roof having been killed. Forcing off the lichen or Moss even with garden hose pressure removes these parasites along with the granules under them. The moss and lichen die,decay releasing the grip on the granules and fall off usually within six weeks.

4} This writer suggests a yearly maintenance on the roof, why? Because the roof will barley stay algae free a year let alone two. Most roofs cleaned with bleach stay clean at least four or five years.

5} All roof's cleaned with bleach are inspected, walking on any roof esp. a wet one should be frowned upon. This puts the worker and home owner at risk.

6} Properly mixed the bleach cleaned roof does not have an over whelming odor, properly applied the cleaner should remain on the roof with little run off at the down spout.

7} All my customers are aware Bleach is used, it is recommended by the shingle manufactures. Again handled properly the bleach solution kills what is on the roof, watering below protects plant life on the ground.

8} This writer response to Power washing a roof. Here they frown on a power washer but they use one? Thier product cannot clean your shingles alone, not even with just a garden hose. They need pressure greater then that to "Blast off "everything. I once read a power washer on a roof is like a category four hurricane.

Pros: Can't think of any.

Cons: Not only is this method damaging to shingles, but it's also not an effective way to remove organisms that cause roof stains. The high-pressure power washing method leaves root systems behind, so the algae will often return rather quickly.

Tip: If you're not sure if the contractor will be using damaging high pressure, ask him to hold his hand under the spray. If he can't do that, then the pressure is too high and can damage your shingles.

Here is a video of a bleach cleaned roof that is instant and no rinsing:

youtu.be/hxTJXXVEioE

Didn't read you entire post (busy) but you can prove they use high pressure because it takes a good amount to move them especially on rough surfaces. Especially up a asphalt roof!

Ed Thompson · Approved Exterior Cleaner

Talked to my rep. He enlightened me that it's a year old and they get bumped out as other articles are written. He said a paid member can write an article and potentially have it listed in the experts section. If it really super good they'll put it in their little stupid book. www.angieslist.com/basic/join-experts-contributor-network.htm