Come learn from the pros! These easy to understand classes offer you the best tips on your yard and home improvement projects. We hope to see you at one of our upcoming events. Do-It-Yourself Seminars Come learn how to install Keystone Retaining Walls or Unilock Pavers & Retaining Wall Stones yourself. Learn all about: Paver Installation Retaining Walls Design Choices These seminars are free of charge and open to anyone Class Size is limited so register today LATROBE, PA LOCATION Please send us an email if your are interested in attending a Do-It-Yourself class.