By Adalheid Voigt. Midcentury. At Wednesday, January 09th 2019, 01:09:36 AM.
There are alternatives to kiln-dried hardwood frames. Metal sofa frames are available, too, but metal can be prone to oxidation along with seasonal changes. Changes in humidity can affect metal frames, so look for one that has been treated to protect against atmospheric changes. Plywood frames as long as they are thick enough can also work well. As a matter of fact, many leading manufacturers now use well-constructed plywood frames.
How long a sofa will last and retain its shape depends largely on the frame, and a high-quality sofa always has a strong, sturdy one: The best frame is made out of kiln-dried hardwood. The process of kiln drying removes all moisture from the wood, enabling it to retain its shape and stability over a long period of time. A frame made of green wood can shrink or crack as it dries. Softwood can bend and break easily, while knotted wood is prone to cracks.
The seating support is also an important component in determining the quality of a sofa. It works in tandem with the frame and the filling. A sturdy frame provides an anchor for good seating support and filling augments it. You should always test the quality of seating support by sitting on a sofa before you buy it. It shouldn‘t sag, and it should provide good support in the seat and in the back.