1. Glass Block Dryer Vent Installation Instructions To install a glass block dryer vent in a new glass block window or wall use the dryer vent block in the place of an 8 in x 8 in glass block The dryer vent can be adapted for either Thinline Series 3 thick or Premiere Series 4 thick glass block For complete instructions on how to install glass block follow Pittsburgh Corning s M ortar Installation Instructions GB 243 or ProVantage Installation Instructions GB 323 e