Perhaps the biggest factor in a shutter’s ability to resist warping, twisting, cupping, or bowing, is the strength and stability of its stiles (the vertical end pieces of a shutter, known as the heart of a shutter). Our stiles are composed of reinforced engineered wood – several wood veneers are layered and bonded together under extreme heat and pressure, producing stiles that are exceptionally durable, solid, and uniform throughout. Don’t settle for stiles that are not composed of engineered wood. Stiles form the support system for the entire shutter and their strength should not be compromised.