Sandstone

[dannyh]

I have a house that is sandstone called Austin stone it has black mold on it. The owner said he tried bleach on it and did no good. Is their andything else I can try or should I use 12%. It looks like it is embedded in the stone. Thanks for the help.

 

[grasshawg]

Hey, Danny. Long time no post! Are you using soap with your bleach? Try adding a little trisodium phosphate. You can buy it at HD.

What exactly is Sandstone?

Randy

 

[north coast]

Sandstone is a sedimentary rock composed mainly of sand-size mineral or rock grains. Most sandstone is composed of quartz and/or feldspar because these are the most common minerals in earth's crust. Be careful when power washing pause to long or get to close to it and you will start eroding the stone.

 

[taselton2]

Sodium Hypochlorite & Soap Will Clean It; You Just Need To Get Your Percentages Right. Do Be Careful If You Are Going To Use Pressure!