Our wood is comprised of two types of glue-lam wood.  The difference is in the type of wood used for the exterior veneers.  A monolithic cover veneer is usually preferred when a transparent coating is to be applied.  While when an opaque coating is applied, finger jointed veneers are generally used given that the price of the finger jointed veneer is normally lower.  The stability of the wood is equal regardless of the type of veneer used.

Wood strip with plane jointed cover lay	Wood strip with finger jointed cover lay
This section diagram shows that all adhesive joints inside the three-ply glue-lam timber are completely hidden from view and protected from weather in the finished window.