I just replaced my carpet (Suncruiser 35U) with 19.75" square commercial carpet tiles that are about 1/4" thick (about the same thickness of LVT planking). I used double sided carpet tape to facilitate removal in case I had a problem with my methods.
In doing so, I removed all the old carpet and pad that was on top of the wooden "ramp" by pulling the carpet and removing or cutting the staples as necessary with a flat, sharpened piece of metal (an old framing square) and hammer. This wasn't a fun job.
In retrospect, I wish that I hadn't done this and had just butted the new carpet up against the old carpet after cutting it at the edge of the extended slide, covering the joint with a metal transition strip. That would have preserved the pre-existing height of the ramp so everything was the same when the slide was extended. All that would be visible would be the color matched transition strip.
What I did do was to screw down several 1' x 4" x 1/2" pieces of wood (with a 45 degree bevel on the end facing the ramp) for the slide to ride up on as it was retracted. This raised the inside edge of the slide enough for me to slide the new carpet tile over the ramp. As I moved down the length of the slide, I removed the boards one at a time if they interfered with my inserting the new carpet. I finished it off with a metal transition strip to minimize the tendency for the carpet to be pushed away from the ramp as the slide was retracted (staples would work as well).
So far, everything works fine. My only concern is that the pre-existing ramp + the new carpet tile isn't as high as the old carpet/pad and ramp so the inside edge of the slide isn't being lifted as much when extended. As I understand this, the purpose of the ramp is to lift the inside edge of the slide, cocking the slide outward to tighten the top weather seal.
If I have a problem, I've noticed that the ramp is accessible from the outside, behind the bottom, exterior weather stripping, and, when the slide is retracted a few inches, all the weight is off the ramp. This would enable me to slip some strips of adhesive coated carpet tile under what I've already installed to raise the ramp height by another 1/4", which should be enough.
Note that this same technique would work with vinyl except I didn't need to replace the existing slide bar.
In the bedroom, I left the old carpet in place under the bed and slide since it isn't visible.
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