Though we don't necessarily see many tile-based roofs on buildings around our immediate areas, many constructs in warmer climates tend to use the clay- and concrete-tile roofing alternatives. Well now there is a special kind of roofing tile, and its manufacturer claims that it helps to clean our environment. The tiles are supposedly smog-eating, since it is believed that their photocatalyst, titanium dioxide coating reacts with nitrogen oxides in the air, released by vehicle engines, for example. How cool is that? So the tiles' titanium oxide coating effectively absorbs the nitrogen oxides in the air, cleaning the air by converting the latter pollutant into harmless calcium nitrates. Ground-breaking, wouldn't you say? And the best part is that the calcium nitrates, formed by the roof tiles, are a common fertilizer that then simply gets washed down off the roof by natural rainfall.
Here's a short breakdown worth noting:
- For an average tile roof, this new technology adds only about $600-$1000 to the overall cost.
- These tiles on a 2,000 square foot house could oxidize, in a year's time, the equivalent of 10,000 miles traveled in a car.