Tile Roof sauce
- Thread starter chrisf
- Start date
Russ Spence
Commercial Pressure Wash Expert
buy a surface cleaner , that is the only true way to clean concrete
Apple Roof Cleaning
Roof Cleaning Instructor
Look at the formula again ?
Tile roofs take a lot stronger chemical.
Why ?
Because concrete and ceramic are quite alkaline, and fight the chemical.
Solution ?
Up the SH percentage to around 45 to 50 percent.
This will clean up tile roofs nicely.
Read .... Learn ..... Pass It On ......
n a prior column we discussed the erroneous use of the term alkali. Portland cement concrete, usually for days, months, and years, is an extraordinarily alkaline material. There are almost no other building materials that are as alkaline. However, normal carbonation of concrete (the reaction of cement hydration products with carbon dioxide in the atmosphere) reduces the pH to 8 1/2 to 9, although that reaction usually is restricted to a thin layer at the surface.
By alkaline we mean basic (versus acidic) or of a high pH, which is a measure of hydroxyl ion (OH-) concentration. The minimum hydroxyl ion concentration in fresh concrete is due to calcium hydroxide (Ca[(OH).sub.2]). Higher pH values are due to the hydroxyl ions from sodium and potassium hydroxides (NaOH and KOH). On a scale of 0 to 14 (as given in many chemistry texts), the pH of concrete can be 15. Well, maybe not quite, but its pore solutions can be so extremely high that it is close to that.
Many articles report that concrete quickly attains a pH of about 12.4 or 12.5 due to the development of a saturated solution of calcium hydroxide. True, but then the calcium hydroxide precipitates, forming portlandite, and the pH rises due to the influence of the hydroxyl ions from sodium and potassium hydroxide. If the "pore water" of recently hardened concrete is "squeezed out" and measured, the pH is over 13, and can be over 14. Even the pH of alkaline drain cleaners and oven cleaners is not this high.
Tile roofs take a lot stronger chemical.
Why ?
Because concrete and ceramic are quite alkaline, and fight the chemical.
Solution ?
Up the SH percentage to around 45 to 50 percent.
This will clean up tile roofs nicely.
Read .... Learn ..... Pass It On ......
n a prior column we discussed the erroneous use of the term alkali. Portland cement concrete, usually for days, months, and years, is an extraordinarily alkaline material. There are almost no other building materials that are as alkaline. However, normal carbonation of concrete (the reaction of cement hydration products with carbon dioxide in the atmosphere) reduces the pH to 8 1/2 to 9, although that reaction usually is restricted to a thin layer at the surface.
By alkaline we mean basic (versus acidic) or of a high pH, which is a measure of hydroxyl ion (OH-) concentration. The minimum hydroxyl ion concentration in fresh concrete is due to calcium hydroxide (Ca[(OH).sub.2]). Higher pH values are due to the hydroxyl ions from sodium and potassium hydroxides (NaOH and KOH). On a scale of 0 to 14 (as given in many chemistry texts), the pH of concrete can be 15. Well, maybe not quite, but its pore solutions can be so extremely high that it is close to that.
Many articles report that concrete quickly attains a pH of about 12.4 or 12.5 due to the development of a saturated solution of calcium hydroxide. True, but then the calcium hydroxide precipitates, forming portlandite, and the pH rises due to the influence of the hydroxyl ions from sodium and potassium hydroxide. If the "pore water" of recently hardened concrete is "squeezed out" and measured, the pH is over 13, and can be over 14. Even the pH of alkaline drain cleaners and oven cleaners is not this high.
Russ Spence
Commercial Pressure Wash Expert
I am impressed, I think I may be aroused Chris
Apple Roof Cleaning
Roof Cleaning Instructor
Well, it is the truth.
I always wondered why we had to use stronger solution to clean tile roofs.
Remember, in SH, it is the formation of an acid that does the cleaning.
Lower pH's are more favorable for this reaction.
The alkaline concrete is at high PH, and so resists acid formation and effectiveness.
Russ Spence
Commercial Pressure Wash Expert
Chris just lovingly named it applesauce , we also have the famous maker of the Phelps wand here too
