Laying commercial grade carpet over existing vinyl floor

[JDgreen227]

I have a query: This week I am redoing a former dining room that has a very costly ($14 per square yard) sheet vinyl floor, and rather than install carpeting with foam padding and tack strips (which will have to be nailed to the undamaged vinyl floor) I purchased a really heavy duty backing commercial carpet remnant that is so stiff it will lie flat with no need for tack strips. Since it will be an exact fit in the room (11'X11') it cannot possibly slide around. Does anybody know if I should place some kind of protection atop the existing vinyl floor such as builder's paper, clear plastic, etc. to protect the vinyl from being scuffed up by the abrasive backing on the carpet? Or is that a needless concern? The room will get little traffic.

Thanks much for any input you can provide.

 

[dusty3030]

I would think most likely it would be scratched in the higer traffic points by the dirt trapped between layers, kind of a sand paper effect.
The cheapest plasitic / foam underlayment that comes in rolls that one would use for cheaper laminate plank floors would probably work very nicely to protect the vinyl florr as well as the foam provide something for the carpet to "grab" as well.

 

[dusty3030]

Roberts UNISON 100 sq ft roll, 25 ft. x 4 ft. x 3/32 in. Premium 2-in-1 Underlayment for Laminate and Engineered Wood Flooring-70-025 at The Home Depot
This or:

Roberts 100 sq. ft. Roll 48 in. Serenity Foam Underlayment-70-010 at The Home Depot
This.

 

[JDgreen227]

Roberts UNISON 100 sq ft roll, 25 ft. x 4 ft. x 3/32 in. Premium 2-in-1 Underlayment for Laminate and Engineered Wood Flooring-70-025 at The Home Depot
This or:

Roberts 100 sq. ft. Roll 48 in. Serenity Foam Underlayment-70-010 at The Home Depot
This.

Thank you, Dusty3030...I never even considered using that type of product and appreciate your suggestions.