This was a 15 year old weathered deck in Ladue, Missouri. The owners were seeking a low maintenence solution for the years to come.
These stains are very old, ranging from plain green moss and algae, to damaging lichens and a rust covered stain and growth slowly climbing up the stone.
Historic Geyer Church with years of stain and growth on the limestone and 178 year old mortar joints.
Crumbling paint on old weatherstrip was one of the big visual challenges of this job.