Our shitelaine says that the lime is working as a good insulation in the attic floor. Not by modern standards. Lime mortar has a thermal conductivity value of 0.19 W/mK and even cheap expanded polystyrene has over five times better insulation value at 0.033 W/mK, not to mention expensive insulation materials that are over 20 times better than lime mortar. Leaving the old floor in place was criticized in YouTube comments and now she's trying to justify the stupidity with lies.