How do i contact cornerstone building brands? For general inquiries on our products, services, or financials, please fill out the contact information form. Please complete the following form so we can best respond to your request. Note that the fields marked with an asterisk * must be completed in order for your form to submit. We thank you for your interest in Cornerstone Building Brands .Why choose cornerstone technology? With over 45 employees, more than 100 industry certs, and a broad range of practical experience, Cornerstone offers what we believe to be the most complete line of technology services in the region. If it’s technology, we probably do it…Click here to see a list of many of the services we provide.Why choose corcornerstone for your annual service contract? Cornerstone’s annual service contract allows us to budget for those needs, and we feel safer knowing that a trained person is monitoring our software and hardware for the updates and upgrades that we need to keep our data safe and secure.