EIFSFACTS.ORG

The Real Facts About EIFS 

- Dryvit Shoots Itself in the Foot -

From advertisements for its Infinity System, a "Pressure Equalized" EIFS manufactured by Dryvit Systems, Inc., as run in many building and architecture trade publications:

"Pressure equalization technology... harnessing the laws of physics".

"I was worried about air pressure differentials causing water intrusion. The vented compartmentalization/pressure equalization component of the INFINITY system alleviated those concerns".

Steve Lin, Architect

"When the wind blows, a building can experience pressure differences between the cavity and exterior walls. Building diagnostic experts acknowledge that the problem of water infiltration is primarily a function of these pressure differentials. Using pressure equalized and rain-screen technology, the INFINITY system eliminates the potential for water infiltration by neutralizing the difference between the applied wind pressure (outside) and the cavity pressure... The more rapidly this pressure is equalized through the wall, the more effective the system is in keeping water out".

And from the version of the advertisement run in 1995:

"Infinity's level of performance in pressure equaliztion technology is unmatched in the industry. Fig. 2 illustrates Infinity's performance as tested by an independent agency. The three plots represented on the graph, all overlapping each other, indicate there is no time lag and no pressure differential across the wall - and no force to drive water into the cavity."