Andersen Casement windows are hinged on the side and open outward to the left or right. Usually taller than wide, their entire sash opens to provide top-to-bottom ventilation.

Source: gravinaswindowservice.com

Gravina’s products and the service were excellent. The new windows are much better than the windows they replaced. They are keeping the warmth in the room and I can see they will keep the heat out in the summer which will be a blessing. The young man who did the the job was prompt, polite and did his work with the minimum amount of disruption. I would highly recommend Gravina’s to anyone who needs windows replaced.

– R. Goldstein, 2015

Source: www.windowsforyourhome.com

Gravina’s installed a top quality Marvin sliding patio door. The installation was outstanding. The interior and exterior finishes were matched exactly. This is the second patio door we have purchased from Gravinas. The first was several years ago. In both cases , they did an outstanding job. I recommended them to my nephew and they replaced several of his windows which were damaged by hail. He was completely satisfied and has ordered more windows from Gravinas of Littleton. 

Source: www.windowsforyourhome.com