Installing Frame Option #421 is simple when you follow the instructions below. You’ll find information on how deep the recess should be for your frame, where to install the anchor bolts, and how to position the frame if you’re going use the metal drain pan. You’ll also find instructions on how to properly pour the cement mortar and where to caulk the joints of your frame. When you’re finished, you’ll have a perfectly-installed mat frame.

These are the 11 steps Frame 421 Installation Instructions