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East Islip Lumber supplies window brands that offer beauty and flexibility along with superior quality and support. If you are unsure which window is the best for you, our sales staff can point you in the right direction. We can also provide you with any hardware or accessories you need to make your windows just perfect.  New windows can be a major investment, but if you choose wisely, you're rewarded with better light, added security and efficient energy usage. East Islip Lumber sells only quality windows, so let us set you up with a brand you can trust.


Andersen Windows and Patio Doors

Andersen is probably the best known window manufacturer in the country, and for a good reason. Renowned for providing high-performing, dependable products, Andersen also backs up their products with an exceptional warranty: the Owner-to-Owner® limited warranty which covers 20 years on glass, and 10 years on non-glass parts. The warranty is completely transferable from each homeowner to the next.


Andersen offers an extensive array of colors, woods, grilles and hardware options that allow you to personalize your windows for the perfect home style you're looking for.


VELUX Sun Tunnel

Ideal for smaller rooms such as closets, hallways, laundry rooms.


Don’t just replace your window, upgrade your home with Andersen and East Islip Lumber, an Andersen Circle of Excellence Dealer.  

Marvin Windows and Doors

East Islip Lumber is honored to offer Marvin Windows and Doors. A leading manufacturer of made-to-order windows and doors for over 100 years, each product is made-to-order, one at a time, to your exact specifications. With many customization options, exclusive features, high-performance energy efficiency innovations, and Marvin’s personal service at every point in the process, you will be able to find the perfect windows and doors for your project.


East Islip Lumber offers two choices for traditional vinyl replacement windows:


Ply Gem utilizes the latest advances in science and technology to bring you superior, stylish windows and patio doors. If it’s time to replace your old windows or patio doors, Ply Gem makes it easy for you to make the right decision about which replacement windows and doors work best for your home and budget.  With a full range of energy-efficient glass and frame choices and style options to choose from, the possible combinations are sure to please your sense of style and your wallet. And, because it’s a Ply Gem window, you can take comfort in knowing that your new windows and patio doors were built with superior craftsmanship to provide stylish durability.

United Windows and Doors

All of United’s window and door products are manufactured with quality and care using high-performance AAMA certified vinyl lineals, and are tested to meet or exceed national standards. You can reflect your personal style simply by adding some of the many design options available. Whether you are looking for a bay or bow window, sidelites or decorative grids, United has a product to meet your needs.



Supreme Skylights

Supreme Skylights designs and manufactures standard and custom skylights for virtually any application.  A premier skylight brand, Supreme Skylights is sought after by architects, roofing contractors, and custom home builders throughout the Northeast. Supreme Skylights' products feature fine workmanship, energy efficient glazing, and are made with the highest quality materials.

VELUX Skylights and Roof Windows

VELUX brings light to life with its lines of distinctive skylights and roof windows.  VELUX skylights and roof windows are designed with the highest quality, most energy efficient daylighting products available. VELUX products are weathertight and can meet any need no matter what the roof pitch, roof material, ceiling type, or construction method.  The company also offers the innovative VELUX Sky Tunnel skylight which brings natural light to areas that were previously impossible to reach such as bathrooms, hallways, kitchens, closets, and even basements!

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