1035d430___BUYER_S_GUIDES___RONA___RONA__Features
[Description] Shower bases, also called pans or trays, cover the floor to protect it from moisture, and facilitate shower installation. Modular bases are designed to go with modular walls. Use an independently purchased base with a tiled shower. The shape and size of shower pans and bases depends on the manufacturer. [Features] 
How the shower pan is placed depends on the position of the drain. Installation is quite straightforward. The subfloor must be level and sturdy, and of course the pan installation must be watertight.
Modular showers, one-piece showers and bases - BUYER'S GUIDES | RONA | RONA
Features