Q: How should I clean the slate in front of my house without damaging the mortar or grout? A: Marble and limestone are in one big group of natural stones, those made up mostly of calcium carbonate ...

For a small job like this, Rugo would charge $775 to clean the slate but couldn’t guarantee it would work. If it didn’t, the company could try to draw out the stain with a poultice, a stiff ...

Only clean about 10-12 square feet before rinsing out the mop to get fresh soapy water. Advertising If the water gets filthy before you’re finished, discard it and get new soapy water.