Windows Installation in Moline

“Mainstream Construction installed windows in our home on 17-18 December 2025. Initially, we were concerned about how cold the house would get, not to mention how installation would impact our holiday plans. We were pleasantly surprised with the speed and efficiency the crew worked. Our house remained cozy and 15 windows (with one being particularly challenging) were replaced in two days. Everyone, including Spencer, office staff and the crew, were very courteous and professional throughout the process. The crew cleaned up any messes that were created and even rehung our heavy, wooden blinds and curtains. We are very happy with the installation process and the windows, themselves. We highly recommend Mainstream Construction for these reasons as well as for their stellar, lifetime warranty.“

“We just bought new windows for our living room and family room. Very happy with the process of learning about and purchasing our windows.“

“Marcus and Paul are incredible to work with! Any needs we needed they went above and beyond! Their siding crew is great! Highly recommended Best for your projects! Thank you!!“

“Alexis was really helpful over the phone and while Patt Co. Design could not fix my specific problem she gave me two referrals and was incredibly kind! Great customer service.“

“The project made such a difference to the look of the house as well as stopping the damaging water problems.“