Mar-Flex Window Wells

Sealing your Basement

Anyone with a basement needs to know about Mar-flex Window Wells. Mar-flex is a below-grade window well system made of polyethylene with a UV inhibitor, designed to add more natural light than traditional window wells. This one-piece well system is molded using a ‘stress-free’ process that allows this product to endure extreme temperatures.


  • Adds more natural light than traditional basement windows
  • One-piece construction
  • Produced from polyethylene with UV inhibitor for many years of maintenance-free use
  • Contoured bottom with drain effectively drain water to the drainage tile
  • “Stress free” molding process makes well capable of enduring extreme temperatures
  • Available in four custom sizes, for all your window well needs
  • Available in four colors: White, Evergreen, Sandstone and Granite

Client Testimonial

” We noticed several large cracks had developed in our foundation walls, which obviously necessitated repair. In our opinion only Mr.Foundation provided an adequate explanation of the cause of the cracking, and a solution for repair in a clear, concise fashion.”

– Alan & Elizabeth McBride, Russell

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