By Adalheid Voigt. Midcentury. At Friday, December 14th 2018, 20:33:46 PM.
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.
In a good-quality frame, the joints get special attention. They are glued, dowelled, and screwed. The corners are further strengthened by the addition of reinforcing blocks for extra support and strength. Generally speaking, plywood and particleboard frames are inferior, especially if they are held together with staples. Additional layers of plywood can help reinforce the frame, so as you can see, construction matters as much as material. If you must choose a sofa with a plywood frame, make sure it has at least 11 to 13 layers of plywood.
Wood can hold a lot of moisture when it is first harvested. What makes a kiln-dried frame better is that the process gets rid of most of the moisture inside the wood. Kilns are huge ovens with very strictly controlled temperatures and humidity. The kiln drying process can remove approximately 93% of the wood's moisture.