Exterior doors are exposed to sun, wind, and/or moisture. Of these three, moisture is a door's greatest enemy. Wood doors, like all exterior products, are subject to the effects of moisture. While all wood doors may look similar, the joinery varies. Special joinery methods used on Nantucket®, Performance Series® and WaterBarrier® doors can help mitigate moisture issues.
Nantucket® JoineryThe Nantucket® door by Simpson® is the toughest wood exterior stile and rail door. The stiles and rails are two pieces of solid lumber which are face laminated together. Because there is no veneer and the core is solid, the door is not subject to veneer delamination or core swelling.
The Nantucket door has a special joinery technique called a mortise-and-tenon joint. A mortise is cut into the stile and rail and a tenon is inserted. Glue is applied to the tenon as well as the entire coped area where the stiles and rails come together. Pins are then driven through holes in the face of the door pulling the joint together. The joint is virtually indestructible allowing the door to hold up in any exposure.
Metropolitan™ JoinerySimilar to the Nantucket®, the Metropolitan™ door utilizes the same solid lumber face-laminated construction technique with no veneers. The difference is in the joinery ‐ the Metropolitan door is joined with dowel pins. Glue is applied to the dowel pins as well as the entire coped area preventing moisture from attacking the door.
If you prefer a minimalistic look, the Metropolitan's joinery removes the face pin aesthetic element. This joinery does not compare to the Nantucket's joint strength, but the door is still capable of being used in any exposure.
While it is important to have an aesthetically pleasing door, it is also important to have a door that is capable of withstanding its environment. If you have a fully protected doorway, any of these joinery types will work well. However, if you have an unprotected doorway, it is important to use the tough Nantucket®, Metropolitan™, or WaterBarrier® doors to ensure the maximum life of your door.