CARY, N.C.--(BUSINESS WIRE)--Ply Gem Holdings, Inc. (NYSE: PGEM), a leading manufacturer of exterior building products in North America, will host a webcast and conference call on Monday, August 10, 2015, at 10:00 a.m. Eastern time to discuss results for the second quarter 2015. These results will be released before the market opens on that day. Interested investors and other parties can listen to a simultaneous webcast of the live conference call and view the accompanying slide presentation by