These clients wanted a pergola on their new TimberTech low maintenance deck for shade and vertical interest. We installed a beautiful white vinyl pergola from the same company that made their railing, Mt. Hope Fence. To maximize the amount of shade they could expect from the pergola, we adjusted the lathing across the top of the pergola to a 30-degree angle. The angle of the lathing and the pergola’s orientation to the sun’s path affect the amount of shade a pergola will provide.