This page was printed from

Air-supported membrane roof gets retrofitted

Exteriors | September 1, 2009 | By:

The Dedmon Athletic Center at Radford University, Radford, Va., is known as “The Bubble” because of its air-supported membrane roof installed in 1981 by Birdair Inc. The roof outlasted its 20-year expectancy but still needed a retrofit in 2009. The recently completed composite membrane roof is the world’s first made of Tensotherm™ with Nanogel®, a fabric less than 50mm thick which quadruples the original roof’s thermal insulation value to R-12.

Nanogel, by Cabot Corp., is sandwiched between two layers of structural PTFE fiberglass membrane while maintaining translucency, allowing a through transmission of 3.5% natural daylight.

For more information, visit

Share this Story

Leave a Reply

Your email address will not be published. Required fields are marked *

Comments are moderated and will show up after being approved.