I am washing the roof of this home because his insurance company is forcing him to. They also want the algae removed from his cedar shake.....I figure I would use a weaker roof mix and I told the guy it would probably look like the bottom of photo #1. I said I don't seal it and he was fine with that...he wants it to seal naturally> Do you think a weak roof mix is all I need?
I would say around a 2% solution and maybe a little pressure to get the thick moss off.
waxman18324 said
Oct 9, 2014
I agree with Mike D.. We did a similar job back in May, which was just as bad if not worse. Plenty of rinsing was the trick for heavy moss removal and we neutralized it as well.
Hank
Patrick G said
Oct 9, 2014
Thanks Mike and Hank. You think a lil light pressure from a power washer? Do you agree it will come out looking like the bottom shake in photo one or brighter?
waxman18324 said
Oct 10, 2014
A little pressure will go a long way. It will look better.
Hank
gutterdog said
Oct 10, 2014
Weve done a few cedar roofs. Been a while. Wed. I did a wood deck with roof mix. Watched it change colors! There was a white film on it, i pressure washed off. Much faster than 4 stepping the wood.
gutterdog said
Oct 10, 2014
Also the wood was so covered in mildew, ya kinda couldnt see the deck. It blended in real well with the woods around it.
Patrick G said
Oct 10, 2014
Thanks Mike, I heard it may get a milky film....light pressure from washer..Thanks.
Patrick G said
Oct 14, 2014
Ok a big thanks to Hank for some helpful hints on my first cedar cleaning. Another big Thanks to Art who provided me with the acid and watered down the property for me as well, and I thought I could do it alone. Now lets recap, I did this cedar for 3 Bills, he just needed the green algae gone for the Ins. Co. At the end I told him this would satisfy the Ins. Company but there was more of a process to prepare the cedar for sealing which he did not want. I rinsed down with a water hose only, I think I should have tried the PW I think it would have got rid of the stuff still on shingle in last photo? Or was my mix to weak? Any comments are welcome...Thanks....
I think if we would have made the Oxalic Acid stronger it would have turned out better. We only ha 10 lbs and added it to 30 gallons of H2o. Pat wanted to rinse, I didn't think it was needed. But it came out better then it was.
waxman18324 said
Oct 15, 2014
We use 12 to 18 ounces of ox per gallon.
Hank
Patrick G said
Oct 15, 2014
Hank that is the right house, but I only did the one car garage on the left.............
Patrick G said
Oct 15, 2014
Ok so a big difference on the cedar shake from yesterday. Is this look normal or is it because I didn't use a PW for rinse and cleaning?
Thats what I said Mike! We only had 1/3 the amount that was needed.
Diamond Roof Cleaning said
Oct 16, 2014
Rinsing just didn't stop the bleaching effect. That's what the ox does.
Patrick G said
Oct 16, 2014
Ok thanks Mike, I'll get it next time...if I have one. This is ok here he just needed for Insurance company. Next time the right Ox and a good amount
gutterdog said
Oct 16, 2014
OX acid? That's new, to me. How does that work???
waxman18324 said
Oct 16, 2014
Mike,
Oxylic Acid is used to neutralize mix on wood surfaces. It's also known as wood brightener. Many hardware stores carry it, albeit, in small quantities or you can order it through your suppliers. It's in powdered form. We use it on wood decks, cedar roof and siding shakes.
Hank
gutterdog said
Oct 16, 2014
Ox acid after bleach? I've used it before after sodium percarb and sodium hydrox. Big difference to the wood.
After bleach??
Patrick G said
Oct 16, 2014
Yes afterwards Mike, I did not use the right ratio in my mix
Art O said
Oct 17, 2014
Should the cedar still be wet when you put the OX on or can you wait a day. I've been doing some testing and the cedar looks better when I wait a day to put the OX on.
Diamond Roof Cleaning said
Oct 17, 2014
We do it right away.
Ed Thompson said
Oct 17, 2014
oxalic acid has a nice sweet taste to it. Not like sh or hydroxide. If I accidentally eat chemicals I prefer oxalic.
gutterdog said
Oct 18, 2014
On decks we applied the ox acid when it was still wet.
Art O said
Oct 18, 2014
Whats with Bob's F-10 Percarbonate Cleaner anybody try it.
F-10 is a percarbonate wood cleaner that safely cleans wood to remove UV damaged wood fibers and restore wood to is natural color.
Depending on water hardness, soiling & application method (downstreaming, direct application. Use F-10 at dilutions of between 4 to 8 oz per gallon.
Handy 2lb plastic containers with screw top lids packed 5 per box.
I am washing the roof of this home because his insurance company is forcing him to. They also want the algae removed from his cedar shake.....I figure I would use a weaker roof mix and I told the guy it would probably look like the bottom of photo #1. I said I don't seal it and he was fine with that...he wants it to seal naturally> Do you think a weak roof mix is all I need?
Hank
Hank
Also the wood was so covered in mildew, ya kinda couldnt see the deck. It blended in real well with the woods around it.
Ok a big thanks to Hank for some helpful hints on my first cedar cleaning. Another big Thanks to Art who provided me with the acid and watered down the property for me as well, and I thought I could do it alone. Now lets recap, I did this cedar for 3 Bills, he just needed the green algae gone for the Ins. Co. At the end I told him this would satisfy the Ins. Company but there was more of a process to prepare the cedar for sealing which he did not want. I rinsed down with a water hose only, I think I should have tried the PW I think it would have got rid of the stuff still on shingle in last photo? Or was my mix to weak? Any comments are welcome...Thanks....
Pat,
Is this the same house?
Hank
Hank
Ok so a big difference on the cedar shake from yesterday. Is this look normal or is it because I didn't use a PW for rinse and cleaning?
Thats what I said Mike! We only had 1/3 the amount that was needed.
Oxylic Acid is used to neutralize mix on wood surfaces. It's also known as wood brightener. Many hardware stores carry it, albeit, in small quantities or you can order it through your suppliers. It's in powdered form. We use it on wood decks, cedar roof and siding shakes.
Hank
After bleach??
F-10 is a percarbonate wood cleaner that safely cleans wood to remove UV damaged wood fibers and restore wood to is natural color.
Depending on water hardness, soiling & application method (downstreaming, direct application. Use F-10 at dilutions of between 4 to 8 oz per gallon.
Handy 2lb plastic containers with screw top lids packed 5 per box.