Antis Roofing & Waterproofing hosted a western-themed party for nearly 1,000 people to mark its 25th anniversary July 25 at its headquarters.

Sharon Ellis, president and chief executive officer of Habitat for Humanity OC, was among the guests in attendance.

The roofing company has donated roofs, in total worth about $500,000, for every Habitat for Humanity of Orange County build since 2009.