Mostly the price. With today’s technology, a solid core polyurethane frame feels and looks like wood. It lasts just as long as wood and absorbs a finish just like wood. Most Uttermost frames are wood except for the more ornate frames which would have to be hand carved if crafted in wood. On these ornate frames, we use the latest technology in making our polyurethane frames as well as the richest hand finishes possible. The other type of frame construction we use frequently is metal, either wrought iron or hand forged steel.