Published at Friday, November 30th 2018, 06:59:53 AM by Paul McKibben. Cuisiners. When you are buying a sofa, you need to make sure that you inspect the materials and especially the frame. If the couch you want has a hardwood frame, then you need to ask whether it has been kiln-dried or not. If it has, then it will last much longer without warping, especially when it comes to changes in humidity.