By Adalheid Voigt. Midcentury. At Wednesday, January 09th 2019, 02:28:47 AM.
This drastic reduction in wood´s moisture content is important so that the wood doesn´t warp or shrink with changes in humidity and temperature. Warping or shrinkage can destabilize your sofa, and even cause it to lose its shape. You would not see that happening in a quality sofa. Air drying can also work well, but since often times the process is not controlled enough, so you cannot be sure that the wood‘s moisture content is sufficiently reduced.
Kiln-dried frames are superior because you can be sure about the reduction of the moisture content to a satisfactory level. Another thing to remember about sofa frames is that a sofa frame that is made of kiln-dried hardwood is a much better choice than a softwood frame even if it is kiln dried. When you look for frames that will last, make sure to ask about how it has been constructed because that is just as important. A well-constructed frame has reinforced joints that are dowelled and glued and uses screws instead of staples.
Now that you have considered the frame and seating support, it is time to look at what kind of filling is used for the cushions. The most common filling is high-density polyurethane. The higher the density, the firmer the cushion will be. Foam can be wrapped in softer material or cotton to make it softer. Dacron-wrapped foam is the cheapest option, but it won’t last as long.