shower tray riser kit

[Fredstudio]

Hi I have a shower tray to fit with a riser kit, and in the instructions it says, Some types of Gel coated stone resin shower trays and larger trays may require a close fitting plywood base as additional support (NOT supplied).

Can any one explain what this means?

 

[Norcon]

Go with what the tray manufacturer recommends.
Most trays need to be fully supported with mortar beneath.

 

[Fredstudio]

Yes but this tray has come with a riser kit ( legs etc ) so don't understand what an additional plywood base could mean.

 

[denso13]

What kind of shower tray are you fitting?

 

[Fredstudio]

is a stone resin 1200 by 800 quadrant. Has come with legs and plastic plinth to cover legs.