I landed a huge realtor account this week and have done 4 estates this week alone. Today I was doing this one and there is a stain they said that no one has been able to get out. Any help would be great I've tried SH, purple power and a few other things but I don't want to get to aggressive and damage this stone or lighten it up and the rest of the stone is dark.
is that is the drip line of the roof. Does it match up directly under where the water runs off the roof?
Chris Mozick said
Oct 4, 2015
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?
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 said
Oct 5, 2015
John, based on Chris's photos would you F9 just the stain areas or the entire pool deck?
AC Lockyer said
Oct 5, 2015
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.
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 said
Oct 5, 2015
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 said
Oct 5, 2015
Thanks for all your help guys I'll have to order the f9 efflo I only have barc f9
Steve Mazzuca said
Oct 5, 2015
As always, great info AC and Josh!
Mardy Isaacs said
Oct 23, 2015
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,
I landed a huge realtor account this week and have done 4 estates this week alone. Today I was doing this one and there is a stain they said that no one has been able to get out. Any help would be great I've tried SH, purple power and a few other things but I don't want to get to aggressive and damage this stone or lighten it up and the rest of the stone is dark.
Chris,
is that is the drip line of the roof. Does it match up directly under where the water runs off the roof?
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?
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
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
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.
Best of luck, Chris! Let us know how it goes.
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.