I don’t know anything about tile roofs so don’t know if pressure is used or not. I just wanted to add that even if you plan on just using pressure you need to use SH with either a pre or post treat. It’ll kill the algae spores and prevent it from coming back as fast. It’ll also clean any spots that you may not have gotten all the way.
@florida_condo_cleani and @garry.cooper probably do quite a few. I bet Garry has even fallen off a few. 
The problem is if you ask 10 people what Spanish tile is you’ll get 5 different products. Your going to have to send a pic of what your referring to.
Speaking of Spanish, I finally fixed the thread title… 
50/50 mix wash with low pressure if necessary
Thanks @florida_condo_cleani
Are you suggesting that we can downstream 50/50 mix and rinse with low pressure? In our experience, that is insufficient to remove the thick algae growth
Not downstream. That wouldn’t touch it. He means mix half water and half 12.5% SH for a 6.25% mix. Apply using your 12v.
What he said 
And wear protective equipment! Good grief, I did a brick wall yesterday with about 5% and my nose was really burning.
We just did 250 stucco balcony walls at an hoa. We used our 12v system with about a 4% mix. We still needed medium pressure to remove the algae. The guys got burns wherever it touched their skin.
On this upcoming project, there are almost no gutters on the house and the landscaping is immaculate, so bleach isn’t an option anyways, unfortunately.
Has anyone tried the mosmatic roof cleaner?
Half the homes we clean the roofs on have over 100k in landscaping and no gutters. Welcome to roof cleaning. Take steps to protect the plants. And do the job correctly.
If something goes wrong which one would you rather fix . The busted roof or a plant ?
this is news to me, good thing i have a 2gpm and a 5gpm
Folks around here call them barrel tile, we get a few every year. Never needed to use high pressure, 5-6% and a high volume rinse. Most roofs we do laugh at 3-4%, like spraying water. Have to be careful and plan it out when doing roofs, lots a variables.
I do barrel tile. You just gotta keep hitting it with 50/50 or greater until the black fades.
You have to hit it from both sides of the barrel to get even coverage.
No gutters = major pain in the … make sure you have tarps and a good ground person.
…and a 3M respirator. Man is that stuff strong.
@dcbrock What’s your preferred respirator?
Tried to get a 3M off amazon, they aren’t selling it to the public currently
I quickly made a business acct and was able to order one next day
