Slide marring floor

Your problem wont be solved by adding more. The peoblem is the new flooring is thicker than the old flooring. The slide room might be able to be raised a bit to return the clearence it needs. Check under the carpet for a roller, or a piece of teflon that it is suppose to slide on.

My Winnebago has an aluminum block covered with carpet that supports the inside edge of the slides as they come in. I'd noticed they started scratching the flooring after about 3 years. Pulled the block off and found that the carpet had acquired sand, tiny stones and all sorts of **** in the pile. Peeled it off the block...not very easy...stuck on with contact cement, and put on new carpet. I think their reasoning is that there will always be debris on the floor that can scratch the flooring and carpet is the best of bad choices as with luck, the debris will get trapped up in the pile and not have enough pressure on it to scratch the floor. RVs with hard plastic 'skids' seem to be the worst at scratching as they just grind whatever's between them and the floor like an abrasive. I think an issue with increased thickness would be most pronounced with the "Schwintek" type slides where the slide is kept in tight horizontal alignment as it goes in and out. Slides with other, bottom driven mechanisms are more free to tilt up without binding as they come in.... A reason broomstick blocks at the top when closed are helpful to keep the slide from rocking out at the top when going over rough roads, an issue the Schwintecs don't have..

Other members with similar problems have used Ultra High Density thin strips to provide a slick load bearing surface for the the slide rollers

Put them down before you bring the slide in

Pick them up and store out of the way, when you put the slide out

The same thing happens to me on one side of the slide. For the life of me, I could not figure out were it was catching. To solve the problem, I have a small piece of carpet that I lay upside down on the offending side when I bring the slide in. Problem solved.

Moved to Tech Issues forum from DIY.

We use strips of a thin rubbized “walk off” mats, one strip under each roller when we bring in the slides. Got the mats at hardware store, one side with the rubber lining the other siide carpeted. We lay the rubber side down so it doesn’t slide as the roller approaches and rolls onto the mat material. We cut the mats approximately 12inches wide and about 30 inches long. works on vinyl floors and friend uses same on gloss tile floor. Solved our problem.

CW and others did sell somewhat hard and tough carpet runner like strips designed to roll you room inside on.
That was some time ago, and I haven't been in a C in a while or looking for them. They might be in online store. I'm not sure what their proper description is however to search for the term

UHMW material

i think this is what the OP asked about, which is what i was also referring too (using the wrong abbreviation)

i bought some that 1/4" thick for a different project
i needed to fasten it with counter sunk screws, which is why i bought thick strips

he needs super thin for his use