Copyright © 2021 Window Source. All Rights Reserved. Website information including, but not limited to; pricing, installation practices, installation cost are subject to change without notice. Website information may also be changed without notice due to unforeseen cost increases of products, raw materials, or currency fluctuations. We carefully check website information regarding pricing and product/installation specifications, but occasionally errors can occur, therefore we reserve the right to change both without notice. All final pricing and installation practices are discussed and agreed upon at the time of a signed contract agreement.