Roof Cleaning Katy Texas (281) 392-2304 wrote:

---

FORD - First On Race Day...in my book.  I appreciate everything that all of our board members put into this.  Certification would be okay if there was not do much piled into one certificate.  I believe optional certifications in different areas would have been a better approach.  That is what PWNA did.  Everyone one, I wish you all a Merry Christmas and a Happy New Year.  May all members have a prosperous 2011.

---

Good Idea Marcus!

May you, your wife, and your two sons have a very Merry Christmas!

SP Cleaning wrote:

---

 

Roof Cleaning Missouri 417-230-8103 wrote:

---

 

Roof Cleaning Pro Greensboro NC (336)362 7659 wrote:

---

I understand TSP is illegal in some parts of the U.S. but here in Greensboro NC it is still sold at Home Depot, Lowes, and professional paint stores.

Yes, it's illegal for consumers to use, but if it is being sold to professionals here in NC and many parts of the country it can be an option. Otherwise why would they sell it, if it is totally illegal. It's not that illegal.

I think it should be an option depending on the area of the country and not restricted by the RCIA saying it's not allowed at all.

---

I am confused on this one, we can purchase TSP and I use it at times, I like it also


21.Members shall follow either the Asphalt Roofing Manufacturers (ARMA) or the RCIA’s Technical Guidelines for cleaning roofs including accepted chemicals.

28. Members shall not use Tri-sodium phosphate in any roof cleaning solution. Phosphates like TSP have been outlawed in much of the Americas therefore the RCIA does not endorse the use of TSP.

Which is it? Do we follow the ARMA or Not?

technical

bulletin

Asphalt Roofing

Manufacturers Association

1156 15th St., NW, Ste. 900

Washington, DC 20005

Tel: (202) 207-0917 • Fax: (202) 223-9741www.asphaltroofing.orgARMA Form No. 217-RR-89

A member service provided by the Asphalt Roofing Manufacturers Association

Revised May 2007Algae Discolorationof RoofsNote: This document was prepared by the Asphalt Roofing Manufacturers Association and is disseminated for informational purposes only. Nothingcontained herein is intended to revoke or change the requirements or specifications of the individual roofing material manufacturers or local, state and

federal building officials that have jurisdiction in your area. Any question, or inquiry, as to the requirements or specifications of a manufacturer, should be

directed to the roofing manufacturer concerned. THE USER IS RESPONSIBLE FOR ASSURING COMPLIANCE WITH ALL APPLICABLE LAWS AND REGULATIONS.

Nothing contained herein shall be interpreted as a warranty by ARMA, either express or implied, including but not limited to the implied warranties of

merchantability, fitness for a particular purpose or non-infringement. IN NO EVENT SHALL ARMA BE LIABLE FOR ANY DAMAGES WHATSOEVER, including

special, indirect, consequential or incidental damages or damages for loss of profits, revenue, use or data, whether claimed in contract, tort or otherwise.

Where exclusion of implied warranties is not allowed, ARMA’s liability shall be limited to the minimum scope and period permitted by law.

For many years, roof discoloration caused by algae has been observed throughout the United States and Canada.

This is commonly referred to as "fungus growth." The discoloration usually has a brown to black appearance, and

may be mistaken for soot, dirt, moss, or tree droppings.

The primary species of algae being observed is Gloeocapsa Magma. This type of algae is contained in and transported

through the air, and tends to collect and grow upon roofing structures. Natural pigments produced by this

algae may cause a white or light colored roof to gradually turn dark brown or black. The algae discolorations should

not be confused with moss or tree droppings, which typically produce only localized discolorations.

This type of roof discoloration has been most widespread in the Gulf States and along the Northwest and Eastern

Seaboards. It is not, however, confined to only these regions. Algae growth occurs to varying degrees in all regions

of the country, especially those subjected to warm, humid conditions. It should be noted that almost all types of

roofing systems are susceptible to algae discoloration. It is, of course, most readily visible upon white or pastel roofs,

while it is not so visible upon darker shades of roofing.

Algae discolorations are difficult to remove from roofing surfaces, but may be lightened by applying a solution ofchlorine bleach, trisodium phosphate, and water. Solutions for these ingredients may vary between shingle manufacturers

and depend on the amount of discoloration. Solutions range from one cup TSP, one gallon bleach and five

gallons of water, to one cup TSP and 2.5 gallons each of bleach and water.

 

 

---

Good Point.

TSP is illegal in some parts of the US, NOT all parts.
The RCIA has to be very careful in what it endorses
for use. There can be legal ramifications to the RCIA
for blanketly endorsing something that is legal in some
states, and not in others. I believe this is why in the
50 points is was clearly stated RCIA does not endorse
the use of phosphates and TSP. This is just my observation
on this.

 

 

---

How about "RCIA does not endorse the use of TSP in states where it is illegal" ?