I watch This Old House on PBS every week. Watching some of the shows where they are installing siding or cedar shingles for roofing; they use a breathable under layment under both. For the siding they use Benjamin Obdyke Home Slicker Rain Screen. For a wood shingle roof they used Benjamin Obdyke Cedar Breather. It made me think if one of these products; or one like this; could be used under the carpet on the bunks to allow the carpet to dry quicker.
https://www.benjaminobdyke.com/produ...ainscreen-6mm/
http://www.roofprosstormdivision.com...r_Brochure.pdf