Clay tiles do more than ... a soft brush is ideal for cleaning especially dirty areas. Finally, thoroughly rinse the entire ...

Over time, roof tiles get covered ... rains through the gutter. Having chemicals lurking in the gutter can then pose a threat,” a worker at Best Choice, a cleaning company revealed.

could clean tons of air pollution from Southern California each day. In a laboratory experiment, engineering students found that ordinary clay roof tiles sprayed with titanium dioxide removed 88% ...

Engineering students have created a roof tile coating that when applied to ... Both teams were advised by David Cocker, a professor of chemical and environmental engineering, and Kawai Tam ...