Solar Innovations. The Timber Wall wood curtain wall system accommodates all design conditions, including vertical, sloped, or integrated vertical and sloped. The systems feature a durable aluminum exterior and warm wood interior. Compared with solid wood window walls, Timber Wall wood curtain walls allow for greater spanning capability with the flexibility and strength of glue-laminated wood. Timber Walls are offered in three widths and a range of wood species. Some panels are certified for hurricane applications. 800.618.0669.