Infinity from Marvin Windows & Doors


Our Ultrex┬« fiberglass delivers lasting performance

  • Expands 87% less than vinyl – resists expanding and contracting in any climate
  • 8 times stronger than vinyl – protects the integrity of your home
  • Resistant to leaks, seal failures and stress cracks – all things that can affect energy efficiency


Acclaimed design that withstands the test of time

  • Ultrex’s strength delivers narrow window and door profiles for expanded views and more daylight
  • Our proprietary acrylic finish is fade-resistant and virtually maintenance-free
  • We offer a complete collection of styles, features and options to complement any home


The benchmark for customer service and satisfaction

  • Limited Lifetime Warranty for as long as you own your home
  • An experience that is designed to give you assurance at every step of the way
  • Our core value: Do the Right Thing

Our Process

Schedule Your Consultation

To schedule a consultation, call us (480)382-2025 or use the form below.

Open Hours

Showroom open by appointment


4014 E Broadway Rd, Suite 408 Phoenix, AZ 85040


(480)382-2025 Help@SiPhoenix.com