AZEK Casing profiles are typically used flush against a wall, door or window to create surrounds. AZEK products are known for longevity and durability. They won't split, crack or rot. They can be installed using traditional woodworking tools and fasteners. AZEK Moulding will look beautiful on your home's exterior, it's also great for high-moisture indoor spaces like bathrooms and laundry rooms to prevent the build-up of mold and mildew indoors.