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Date: May 12, 2010
Questions on slate
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Got a chance to clean a slate roof. From what I can find shingle roof mix should work well. I am able to shoot it from from a ladder to keep off the slate.

Are you guys rinsing off the roof? Should I expect to treat 2-3 times? Moss is not too bad, but in need of a good cleaning. Also gutters are copper I think. I am sure this will take more time, due to the amount of cleaning, but I would love to hear some advice on quoting and cleaning compared to shingles. I have not been able to find much info on slate.

Thanks,
Noll 

-- Edited by Renew it on Wednesday 12th of May 2010 11:44:11 PM

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Date: May 13, 2010
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Thats going to make for some great before and afters. My only advise for slate is that if you use TSP normally, dont on this one. It will leave a noticable film on slate.

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Date: May 13, 2010
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Confident Roof Cleaning Houston TX wrote:

Thats going to make for some great before and afters. My only advise for slate is that if you use TSP normally, dont on this one. It will leave a noticable film on slate.



I agree with my friend Scott biggrin
Use ONLY Chlorine/Water on a slate roof, forget the Dawn, TSP, just Chlorine/Water.
Slate is weird, soaps, TSP, etc, etc, can discolor it, and leave a very noticeable film, why take that chance ?

 



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guest

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Date: May 13, 2010
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Chris, is it the same for barrel tile?

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Guest

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Date: May 13, 2010
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Thanks for the advice!! I will keep the soap out. Would you also cut out the ISO too? I figured that would only help. Guess I should count on using a bunch more mix. Some of the tile is on the face of the dormers. I can't wait to see the finished result. Rinse?? I don't normally, but should I on slate?

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Non-Pressure Roof Cleaning
& Exterior Washiing
www.renewitroofcleaning.com
484-678-1888
Chester County, PA



Premium Member Roof Cleaning Institute of America

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Date: May 14, 2010
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Does the SH stick to the roof ok with only using sh and water ?



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Roof Cleaners of Southwest Pa wrote:

 

Does the SH stick to the roof ok with only using sh and water ?

 



Not really as well as using a thickener, but slate is a weird animal. I would rather waste some chemical with run off then take the chance of the slate looking weird from surfactants, and TSP. We respect slate roofs, and use a rather weak solution to clean them. IF we have to spray em twice, so be it, don't want to risk using really strong chemical mix on them.
You think a Tile Roof is expensive to replace, try slate ?

 



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Click here for more information

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Premium Member Roof Cleaning Institute Of America Certified Roof Cleaning Specialist

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Date: Mar 22, 2012
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Apple Roof Cleaning Tampa FL (813) 655-8777 wrote:
Roof Cleaners of Southwest Pa wrote:

 

Does the SH stick to the roof ok with only using sh and water ?

 



Not really as well as using a thickener, but slate is a weird animal. I would rather waste some chemical with run off then take the chance of the slate looking weird from surfactants, and baking soap. We respect slate roofs, and use a rather weak solution to clean them. IF we have to spray em twice, so be it, don't want to risk using really strong chemical mix on them.
You think a Tile Roof is expensive to replace, try slate ?

 


 Chris what is a weak mix? 5gl to 40 H2O



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Date: Mar 22, 2012
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I can only add that its gonna run down pretty fast so figure that in. Also I love that house!

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I add a little extra soap for slate.

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Roof Cleaning New Jersey wrote:

I add a little extra soap for slate.


 Ed, I just landed my first slate roof and I was told not to use soap because it leaves a film on the slate.  They sugguested using a weak mix.  Should I rinse after cleaning?  The roof is 70 years old and has a lot of moss and algae.



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Date: Mar 22, 2012
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Roof Cleaning By A&E wrote:
Roof Cleaning New Jersey wrote:

I add a little extra soap for slate.


 Ed, I just landed my first slate roof and I was told not to use soap because it leaves a film on the slate.  They sugguested using a weak mix.  Should I rinse after cleaning?  The roof is 70 years old and has a lot of moss and algae.


 Nice first slate job, lets us know how it goes. Post some twitter pics, I know you will. 



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Date: Mar 25, 2012
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Anybody who has done slate are you rinsing the slate down after the mix is shot and want is ths ratio of sh to water?

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Premium Member Roof Cleaning Institute of America Certified Roof Cleaning Specialist

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Date: Mar 25, 2012
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I have done slate roofs and I do not rinse them down. The ratio I use is the same as on an asphalt roof.

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Date: Mar 25, 2012
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Thanks Charlie doing one wednesday.

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Premium Member Roof Cleaning Institute of America Certified Roof Cleaning Specialist

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Date: Mar 26, 2012
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good luck with that slate roof Eric! keep us posted!!



-- Edited by Mr Maintenance on Monday 26th of March 2012 05:50:43 AM

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