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Chems for cleaning Hardie board cement siding?

Rico1

New member
I am seeing more of this cement siding and finally got a gig to clean some. Does anyone have experience with this i.e. what chems. work well, or any words of caution?

an ounce of prevention...
 

Lonnie Greenwood

New member
I went to the manufacturer's website and they recommend the following and there is alot more info on the link I am providing.

"High Pressure water blasts (e.g. pressure washers and sand
blasting) will damage the surface of fiber-cement. James
Hardie does not recommend these methods of cleaning. Low
pressure water spray, or a soft brush are more suitable"

Look under the "Tips and articles" section http://www.jameshardie.com/homeowner/improveYourHome_articlesResources_technicalDocuments.shtml
 

Guy Blackmon

New member
Be sure to "Hand Check" for oxidation, this siding is prone to oxidize badly on the side that gets the most Sun. Like Mike said "Low Pressure"
 

Brian Wendling

New member
Do not put to much of the 12% on it. The painted siding will fade easily. We already had a problem last summer in the heat with to much house wash. Just be careful or you can be painting.
 

Rico1

New member
It is painted and it's been on less than a year, i think, so oxidation is not an issue yet. I have taken your advice and checked their web site, low pressure is way to go. I just talked this guy into waiting till it warms up a bit, it would be mess right now (mid 30's) so i'll keep this on file.

Excellent stuff guys!

Thanks a bunch!
 

Randy Borio

New member
Did one last fall, last job of the year in fact. As posted low pressure and a mild mix with a soft brush. Worked so well it was ALMOST like stealing.
 

James Foley

New member
I have seen the incorrect paint used and the paint start to chalk and absorb moisture in one year. Mildew gets sucked in a bit more and more work to get rid of.
 

Doug Rucker

UAMCC Board of Directors
Hey Jeff, do you service humble kingwood area. I get homes every now and then that need siding ( that old particle board stuff) replaced.
 

Richard Velazquez

Contributing Member
Something I do on the darker color houses is do a test spot to ensure no fading or reaction with paint. Reds, browns, & blues are more susceptible to fading for some reason. Guess this will have to deal more with the quality of paint used vs the siding.
 
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