Dried wood will always be warm to the touch (even in winter). Conversely, the 'wet' wood will be cold, even in the hottest days. Note the color of the wooden parts. Dark spots indicate decay process (perhaps tree has rot before drying). If the manufacturer is fully covered parts of the frame (eg, the abundance of tissue) where it is not required to process (for example, in the other stores in similar models of the elements framework is not closed), perhaps the manufacturer just tried to hide from you what wood he used for the frame. Sometimes more profitable and cheaper raw upholster not planed boards with a cloth, or simply not buy it.
Most foreign producers entirely close the visible part of the frame. For them it is – the rule of good taste. But when our producer, saving on fabric for the back of the couch (still would stand by the wall), the mechanism (the cheap), the quality of the fabric (cheap Turkey or China) and even on the brackets, suddenly stud frame with a cloth Perhaps the rules of etiquette here at anything. Pay attention to the material of the bearing parts are made of soft furniture. In furniture showroom you must tell us about the material from which made upholstered furniture. If you use softwood timber – pay attention to the thickness of the timber. It must inspire your confidence (not less than 40mm. For load side).
Pay attention to the presence of knots. They must be no more than 2 cm in diameter and should not be much (knots weakens the rigidity of the beam). Number of knots and their size determine the grade of wood. To determine the frame material – lift chair (sofa can be a mechanism of transformation which it substantially heavier). If you did it, hence the frame is made of plywood or wood. Furniture with frame of the cpd, you will immediately feel the weight. And if the couch is also a box for clothes You move this furniture is hard enough, but to raise it (without the help of friends and relatives) You just can not.