Blake construction is a very popular construction used for better made shoes, especially in Italy. This construction is simpler than a welted construction. A single row of stitching attaches the insole to the upper and the outsole. The stitching is located inside the shoe and done by a machine invented by Reed Blake. The technique is sometimes called McKay construction since Blake sold the patent to Gordon McKay.
Shoes with Blake construction tend to be more flexible than Goodyear welted shoes since they have fewer layers but since there is a row of stitching through the insole the possibility of moisture wicking from the ground is greater.
Contrary to popular belief Blake shoes can be resoled with the use of a Blake soling machine.
Norwegian construction is a welted construction also commonly referred to as Norvegese. Instead of the upper running parallel to the rib in the insole as in Goodyear construction, the upper is turned outward and sits parallel to the outsole. One row of stitching connects the welt to the rib of the insole and another row connects the welt to the outsole. Since the upper is turned outward, Norwegian construction does not allow a way for moisture to enter the shoe by way of the upper / welt stitching.
Norwegian construction is easily identifiable by the stitching along the base of the upper. This construction, like Goodyear, is stiffer than Blake construction. The aesthetic of Norwegian stitching lends itself very well for dress shoes and boots, and adds volume to the shoe resulting in flexibility of wearing with dress as well as more casual attire.