Few photos of another ceder roof job. Only one pic of roof after I sealed it. Just as I finished applying the sealer today the sun set before I could take more photos of the coated roof areas.
I am not a fan of using SH/bleach on any uncoated or weathered wood. I prefer pulverized sodium precarbonate made by Solvay Chemicals mixed with Dawn and water. Using around 1500 psi at at 4gpm I strip away any organic matter living on the shingles, followed by a heavy soaking of 99.6% oxalic acid made by Samiran mixed with water and rinsed after 20 to 30 minutes. Depending on the customers price point I seal using Sikkins or CWF 99% of the time. This customer insisted on me applying Sta Brite R with a cedar tint made by ISK Biocides, Inc. I honestly have never used this product and no very little about it. It it water based and comes in a concentrate that you mix with water the day you apply it.
Only reason I asked, is that it came out so light that it looked like you bleached it. Usually with pressure washing alone with no chems at all, or just giving a low pressure percarboante bath always brings out the natural red cedar tone. that is before anything else has even been done. Roof looks good and clean though. Lucky from the pics the roof was just greying. The heavy growth roofs like the ones we deal with in the mountains, don't get phased by just washing, gotta use alittle elbow grease. Youll see in some of our early pics that we do more hand brushing than p washing. It looks like your method works good. Good looking roof!
Good looking roof man!!! Ive done some low pressure wood restoration also, with the percobonate and oxalic acid. What I understand is bleach is bad for wood. Never done a wood roof. I'd like to try one one day! Heres a punished swing set I did add just a lil sodium hypochlorite to the mix because of the tremendus mold on it. Do you rinse the ooxalic acid or leave it? I heard some just leave it?
-- Edited by gutterdog on Thursday 24th of December 2009 03:15:19 PM