Riverhead Building Supply is an authorized dealer of Mathews Brothers windows and doors. In business since 1854, Mathews Brothers manufacturers traditional wood, vinyl, and contemporary composite windows and doors. All the windows are American-made using American-made components, and are designed to be energy-efficient and environmentally friendly.


Three Series to Choose From

Riverhead Building Supply offers the following series of Matthews Brothers windows and doors:

  • Spencer Walcott Vinyl Window Series – Beautifully styled, high-quality windows offering a lifetime of trouble-free performance.
  • Noah Merrill Engineered Composite Window Series – Made from a patented engineered material that is impervious to moisture and insects.
  • Clara Starrett High Performance Vinyl Windows – Designated as one of the Most Efficient ENERGY STAR© qualified products in 2013 and 2014. Available in a palette of 17 prefinished exterior colors with many more custom colors available.