Usually when you want to change the landscaping you bring out the big knife and cut away. Model railroaders (as the community is called) use pink insulation foa

Usually when you want to change the landscaping you bring out the big knife and cut away. Model railroaders (as the community is called) use pink insulation foam so it's easier to clean up, cut up, carve out. A hot wire foam cutter is then used to shape the new foam blocks to the existing landscaping, paint, and repeat the coverage of false foliage and greenery. The old landscaping at that point goes into the garbage and into landfill after scraping off what foliage you can to save (in little jars) for the next landscape project. Pink insulation foam doesn't have beads like polystyrene Styrofoam does so it's not so much of a mess. Similar to memory foam but harder. I guess theoretically you could shred the pink foam and use it in foam spray to insulate the attic... In the end, railroaders like XPS foam as opposed to EPS foam due to lack of "beads" and mess.