Product Details and Functions:
The two wood-to-wood overlap connections add greatly to water and air tightness. There are never any open seams visible like a traditional 'Americana' square cut door where it is virtually impossible to fit the sash perfectly into the frame and see the exact same seam width on all sides. This visual imbalance in symmetry is exacerbated over time when the normal slight tiring of hardware and slight settling of wood structure cause the door leaf and frame to move slightly. Often the seams grow to be wider at one end than the other. Open seams expose locking and latching hardware which is not only unsightly but more prone to exposure and corrosion.
The Euro step down profile incorporates a hidden groove to install multipoint locking which by its nature has many moving parts so protection from the elements is essential, and, indeed another great advantage to the home owner. Other important advantages are the overlapping profiles which offer much higher STC ratings in sound proofing as well as stronger security against the intruder with burglar's tools. Lastly, designers like the minimalist stile and rail possibilities with Euro systems.