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AG Millworks
Bi-Fold Windows | Kitchen Passthrough Windows

Fold windows open with AG Millworks Bi-Fold Windows and enhance your indoor-outdoor living. Bi-Fold Windows allow you to create a kitchen "passthrough" window for the ultimate entertaining experience! Made in the USA, our windows are energy efficient and fully customizable. Exquisite wood surfaces on the interior provide warm, luxurious design details. Thick extruded aluminum exteriors with durable baked-on Kynar paint in any imaginable color completes the picture. Create the entertainment space of your dreams with AG Millworks Bi-Fold Windows.


Title 24 Compliant
Title 24 Compliant

Title 24, a component of the California Code of Regulations, establishes guidelines for building energy efficiency. Its objectives include lowering energy consumption, cutting utility expenses, safeguarding the environment, and mitigating climate effects. The standards outlined in Title 24 assess the energy efficiency of buildings comprehensively, covering various elements such as windows, doors, lighting, appliances, and electrical and mechanical systems. The California Energy Commission (CEC) oversees the adoption, implementation, and revision of energy efficiency requirements outlined in Title 24. Local municipal and county bodies are tasked with ensuring adherence to these standards through verification and enforcement measures.

The California Energy Commission periodically revises the energy standards to accommodate the evaluation and potential integration of emerging energy-efficient technologies and methodologies. Our AG Millworks Door and Window Systems have consistently met or surpassed each revision of the California energy-efficient standards. 

Product Features
  • Custom Sizes at No Additional Cost
  • Aluminum Clad/Wood
  • All Wood
  • Slimline stiles and rails
  • Euro stiles and rails
  • Traditional stiles and rails
  • Multiple hardware options
  • Various glass options
  • Optional divided lites
  • Optional retractable screen system
  • Energy Solutions
Stile and Rail Profiles
SLIMLINE | ultra-modern

SLIMLINE | ultra-modern: 2-1/2” Stiles & Rails with 3-7/16” Lock Stile

Energy Performance | Clad/Wood: U-factor = .29

EURO | contemporary

EURO | contemporary: 3-7/16” Stiles & Rails

Energy Performance | Clad/Wood with LoE366/Argon IG (Dual Glaze) : U-factor = .30
Energy Performance | All Wood with LoE366/Argon IG (Dual Glaze) : U-factor = .28
Energy Performance | Accoya Wood  with LoE366/Argon IG (Dual Glaze) : U-factor = .27

Standard Colors
Standard Colors

When exposure to sun and rain is an issue, opt for Aluminum Clad/Wood Bi-Fold Windows. We combine a sleek, tough, low maintenance exterior of 1/16" thick extruded aluminum with a rich, warm, all-wood interior to give you the best of both worlds. AG offers 5 standard clad color options. Clad exteriors are painted with 70% kynar 500 and meets a 2605.

Custom Colors
Custom Colors

We’ll match any manufacturer’s exterior clad color to ensure a consistent look between our products and theirs.

Retractable Screen

Pair your Bi-Fold WINDOWS with an innovative and functional retractable accordion screen. This is the perfect solution to screening openings to protect your home from insects and other unwanted elements. The versatile pleated screen is your answer to deter bugs while preserving the indoor-outdoor feeling! 

Your optional retractable accordion screen is factory installed and integrated into the jamb, saving you time and money on installation.

Colors Available:


Ultra Guide® Track System

Bi-Fold Windows are available with a flush track system we call the Ultra Guide® for the smoothest transition possible between indoors and outdoors.

*Appropriate for extremely low-exposure environments only; no warranty for water penetration with this option.

    About us

    Welcome to AG Millworks, where we combine extraordinary designs with traditional old world craftsmanship and innovation to produce ageless millwork creations that will bring your building project to life.

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    Phone:  (805) 644-4494
    3111 Golf Course Drive
    Ventura, California 93003