Need help AC - Certified SoftWash Roof Cleaning

Chris Mozick · Junior Member

Need help AC

John Aloisio · SoftWash Systems 5-Star Professional

Chris,

is that is the drip line of the roof. Does it match up directly under where the water runs off the roof?

Chris Mozick · Junior Member

John here are some pics of the roof. It must be something up there I will have to check it out next time I go. As you can see in these pics the stain isn't present but it is coming of the drip edge so it has to be from something on the roof. What do you suggest?

John Aloisio · SoftWash Systems 5-Star Professional

Chris,

thats why i asked, because it was in a line and looked to be under the drip line. I saw a similar stain like this two years ago on a job and the owner had asked a few other companies and they said they could not remove It. I think it's that type of stone, like travertine that does it. I did a small demo with F9 and it worke. We then did the whole house as well as the pool deck. It took a few coats of F9 pretty much straight, but it came clean. I think either f9 or f9 efflo will work.

hope this helps

Steve Mazzuca · SoftWash Systems Authorized Professional

John, based on Chris's photos would you F9 just the stain areas or the entire pool deck?

AC Lockyer · Administrator

Chris,

Actually looks very much like a calcium stain. I know we all think calcium is white but in the western US these stains look dark and almost like mildew but have a glossy look to them and are HARD in feel. Craig Harrison has a new chem called F9 Efflo. It handles hard water stains like calcium and efflorencence. Here is a link to buy it. It should work a bit quicker than the F9 Barq which is meant for rust stains not calcium.

http://www.jracenstein.com/item/320-6153/f9-efflorescence-calcium-remover-gal/

Thanks,

AC

Josh Agadoni · SoftWash Systems Authorized Professional

I agree with AC. Here in California we see similar stains pretty often and have had success with the F9 Efflo.

Steve, you would want to treat the entire area around the stain just like you would with F9 Barc. I would treat the area surrounding the stains and define it at a grout line, rinse it (surface cleaner), let it dry and see how the color of the stone has been affected. You may find that you have to treat the whole pool deck, but I would guess not since the stones are all different colors and shades.

Josh Agadoni · SoftWash Systems Authorized Professional

Chris, if you do use the F9 Efflo you'll want to use it at a higher concentration than the directions on the container indicate. I learned this the hard way after a lot of wasted time and finally a phone call to Craig Harrison. I might call him and get his thoughts about mix ratio on this particular application. He'll probably advise you to do the whole thing and then reseal it after.

Best of luck, Chris! Let us know how it goes.

Chris Mozick · Junior Member

Thanks for all your help guys I'll have to order the f9 efflo I only have barc f9

Steve Mazzuca · SoftWash Systems Authorized Professional

As always, great info AC and Josh!

Mardy Isaacs · SoftWash Systems Authorized Professional

Great info here, thank you, I have an old stone home to do, with stains just like this. And I do have plenty of F9 barc,

and efflo.