If a customer needs robroy or other PVC coated rigid, prepare them for severe sticker shock. Also get a good count of couplings, connectors, and other hard ware. It's all expensive and an extra cost.
That is very true, be ready to provide CPR when you give the customer the price.
One of our guys did a job in a hazardous location with PVC coated RMC.
What a pain in the rear!
Short an LB or a junction box, the job stops for days to weeks to get the expensive parts out to the job, not shelf items at any supply houses we deal with.
Even PVC coated 1 hole clips with stand offs had lead time and a high price.
I installed a 480 volt 30 amp 3 phase PVC coated hazardous location receptacle and matching cord cap, they told me just that was over $2,000.
The receptacle had a switch in it that killed a contactor outside the hazardous area when you started to remove the cord cap.
I like EMT and MC.