Color-Changing Roof Tiles
Add to
Like
Comment
Share
By Tiffany Chu / Published by Dwell
Recommended by
Living in a temperate climate, and deciding between a dark roof and a white roof? Trying to calculate if your summertime benefit with a light roof will outweigh the potential wintertime losses? We tweeted about this new roof tile prototype a couple weeks ago, and we're eagerly following its development.

Based on changes in temperature, the tile becomes white when hot, reflecting about 80 percent of the sunlight falling on them (and saving as much as 20 percent of cooling costs). When cold, they turn black to absorb heat, with only about 30 percent of sunlight reflected.

How is this done? With a common commercial polymer in a water solution, between layers of flexible plastic. At the back, there is a dark layer that is revealed when the temperature is below a certain point, at which the polymer stays dissolved. As it gets warmer, the tile becomes a white surface when the polymer condenses to form droplets that scatter light.

At this time, the inventors, MIT's Thermeleon team (rhymes with chameleon, ha) from the Materials Science Department, are still testing out the product's durability. We've seen heat-activated color tiles before (at Moving Color), but this seems to be the first to apply the technology for external building use. Hopefully, costs will be competitive with established building materials, and prove to be a viable roofing alternative that is chock full of energy-saving possibilities.

Tiffany Chu

@tiffanychu

Besides writing and designing, Tiffany Chu's passions include photography, cartography, and all things Scandinavian.

Comments
Everybody loves feedback. Be the first to add a comment.
The author will be notified whenever new comments are added.
Dwell Life © 2016Download our iOS App

Join us and discover, create, and collaborate with the Dwell community.

Log in