When we bought our Gemini sailing catamaran, we prioritized the work we planned for Yacht A Fun. On the “round to it” list was replacing the very sun-faded carpet liner for the master bedroom.
When our catamaran was bought, I had vacuumed the carpet thoroughly, and shampooed it as well. But it looked really awful.
The original design was that the carpet covered the hull below the berth. Teak flooring held the floor carpet via a recessed area shaped to match the floor panel.
Diann’s Mom had new beige carpeting installed at her home. The left over carpet section was more than enough for our project(s). The color was on target and the backing workable. AND, the zero-cost was a positive as well.
This April, we decided it was time, to put the task on this month’s short list.
The original teak and holly floor board was in too rough a shape to consider reusing. Fully carpeting the floor simplified the alternatives we considered. ReBond carpet pad was used to fill the area previously taken by the wood flooring panel. 
Marine grade vinyl worked well for covering the hull areas which had previously been carpeted. It took Diann over two hours to use her Sailrite sewing machine to edge the thick carpet- with the same vinyl as the wall liner.
The change in appearance is worth the effort. The wild card is going to be whether mildew becomes an issue for the carpet’s nylon fibers. One thing about it, for sure, is that we’ll find out!
The story / blog of Yacht A Fun, a Gemini catamaran sailboat, traveling the ICW and east coast with insights to the extended cruising life. Catamaran carpet