A comprehensive list of Ronkonkoma, NY based companies, stores, manufacturers and suppliers offering windows and doors for sale, installation, replacement and repair services. Read unbiased reviews of local contractors. 
We believe every homeowner deserves not just a one-of-a-kind home to stand out in the neighborhood but also an experience and end result fit for a king (or queen). Our decades on the job and exclusive partnerships mean leading manufacturers trust us to install only the highest quality products. And our affordable financing makes your dream of a unique, quality-driven home a reality. Any contractor
Jeffrey Shapiro — King Quality did an amazing job installing new siding and front door on our home. Tony and his crew were quick and did a
To view Alpha's complete line of premium windows, siding and roofing, we invite you to visit our showroom. You will have an opportunity to examine Alpha's superb craftsmanship up-close and compare our features to those of our competitors. When you purchase Alpha products, be assured you are dealing with a single source through every phase of installation and service.
Vanna Kanha — Alpha did an excellent job with my home's renovation project. From the crews that did my windows and siding to the rep who
Weiland Flush Track Lift and Slide Doors were used at numerous locations on this project to create a seamless transition to the outdoors. The pool coping was used as the threshold for the thirty‐foot clear opening pocket doors. The Weiland doors in the Kitchen, Bedrooms, and Wine Cellar were paired with Loewen windows to complete the package.