The Metal Window — custom aluminum window and door manufacturer
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Custom aluminum framed windows with insulated glass built by The Metal Window
Aluminum Windows & Doors Made to Order

Custom Metal Windows Built to Your Exact Specifications

Sigma-welded 6063-T6 aluminum frames, engineered glass packages and hardware — fabricated unit by unit for architects, builders and dealers.

Explore Our Windows View Door Systems
60+ YearsFabricating metal windows
6063-T6Extruded alloy frames
100% Made to OrderNo stock sizes required
What We Manufacture

Windows and Doors Engineered Around Your Drawings

We are a manufacturing shop, not a reseller. Every frame is cut, welded, finished and glazed from your dimensions and details — including radius heads, oversized fixed lites and historic profile replication.

Custom aluminum casement and fixed windows with narrow sightlines

Custom Aluminum Windows

Casement, awning, fixed, horizontal slider, double hung and specialty shapes in premium aluminum framing with slim sightlines and factory-applied finishes.

  • Welded corners for square, rigid frames that stay true
  • Thermally broken options for lower U-factor and less condensation
  • Insulated glass packages selected by orientation and climate
See window series
Custom welded aluminum swinging and sliding glass doors

Custom Aluminum Doors

Two welded-frame swinging door series plus a heavy duty conventional sliding system built for tall openings and daily commercial-level cycling.

  • Welded frames and panels — no mitred mechanical corners
  • Heavy duty rollers, tracks and multi-point hardware options
  • Matching window finishes for consistent elevations
See door systems
Built to Last

Specification-Level Quality, Documented

The details that decide whether a window performs for five years or fifty. Here is exactly what goes into ours.

Aluminum window frame section showing welded corner construction
Frame Specification

6063-T6 Alloy, Sigma Welded

Window members are extruded from 6063-T6 aluminum alloy with all joints and corners sigma welded, then dressed smooth — one continuous frame instead of fastened parts.

Aluminum casement window hardware and operating gear
Hardware

Hardware Proven Over Decades

We have manufactured aluminum casement windows and doors for more than sixty years, and we specify operators, hinges and locks that we can still service years after installation.

Roll formed aluminum window screen with charcoal fiberglass mesh
Screens

Roll Formed Screen Frames

Bug screens in flat and long leg styles using roll formed aluminum framing with 16 x 18 charcoal mesh set in vinyl spline, retained by traditional screen clips.

Made to OrderUnits built to submitted sizes, elevations and details.
Coastal ReadyFinish systems selected for salt-air exposure zones.
Glass EngineeredLow-E, laminated, tempered and obscure options by opening.
Dealer SupportShop drawings, lead-time clarity and takeoff assistance.
Recent Work

Projects Built From Our Shop Floor

Residential remodels, custom homes and multi-unit elevations where sightlines, opening sizes and finish consistency mattered.

Custom aluminum windows and glass doors installed on a modern residence
Matched window and door elevation, welded aluminum frames
Custom casement windows with narrow aluminum sightlines by The Metal Window
Custom casement units with narrow sightlines
Aluminum home windows with insulated glass on a residential facade
Whole-home replacement with insulated glass packages
Good to Know

Questions Buyers and Specifiers Ask Us

Answers written by the people who cut, weld and glaze the units — not a marketing department.

Start with premium solid aluminum frames and a high quality finish and you eliminate years of costly, time consuming maintenance. Aluminum will not swell, warp, rot or crack, and it carries larger glass areas on slimmer profiles than wood or vinyl of the same span.
All window members are 6063-T6 extruded aluminum with every joint and corner sigma welded. Welded corners behave as one continuous section, so the frame stays square under wind load and transport instead of relying on screws or crimps that can work loose.
No. We do not cut down trees or use petroleum products to build our windows and doors. Aluminum is infinitely recyclable with no loss of properties, which makes a welded aluminum frame one of the lowest lifecycle-impact options on the market.
Wood windows and doors must be painted or sealed to survive the environment, which adds to total lifecycle cost. Even with diligent maintenance they can still swell, warp and crack with age, especially in coastal humidity and high-UV exposure.
Two: flat and long leg. Both use roll formed aluminum framing with 16 x 18 charcoal fiberglass mesh held by a vinyl spline, and both are retained with traditional screen clips so they can be removed for cleaning without tools.
A polyamide or poured-and-debridged barrier separates exterior aluminum from interior aluminum, interrupting conductive heat flow through the frame. You get a lower U-factor, warmer interior frame surfaces and far less condensation at the perimeter of the glass.
Interior view of aluminum windows with plants on the sill
Field Notes

Latest Articles From Our Fabrication Team

Straight talk on aluminum frames, glass, finishes and installation from the people who build the units.

Comparison of aluminum and steel window framing profiles
Frames

Aluminum or Steel Frames? What Actually Survives a Coastal Home

Two metal frames, one coastline, and a lot of bad advice. How to decide which frame belongs on your elevation — from ocean bluffs to inland heat.

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Thermally broken aluminum window frame with insulated glass unit
Thermal Performance

The Small Strip That Makes Aluminum Windows Feel Like a Different Product

A thermal break is a few millimetres of insulation hidden in the frame — and the difference between a window that sweats and one that just works.

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Selecting insulated glass packages for metal window frames
Ownership

Your Metal Windows Can Last Decades. Here's How.

Three connected guides that follow a metal window from the first draft you notice, through install week, to the seasonal care that keeps it tight.

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Seasonal maintenance of aluminum window gaskets and weep holes
Maintenance

Weep Holes, Gaskets and the Orange Freckle That Becomes a Hole

A four-season routine that takes twenty minutes per elevation and saves a frame — plus what to inspect after the first heavy rain.

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Window flashing and shim installation sequence on a rough opening
Installation

Install It Right Once, Stay Dry for Decades

Flashing order, shims, thermal breaks and cure time. What a careful crew does during install week that a rushed one skips — and how to check their work.

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Drafty metal window being evaluated for replacement
Specifying

Fogged Panes and Cold Drafts: Reading the Signs Before You Reorder

How to diagnose failed seals, sweating frames and air leakage, then choose a system, glass package and crew before the season books out.

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I've used The Metal Window before and it was great — I was pleased once again. The staff was very nice and really went the extra mile to help us out.

Ralph

Homeowner, repeat customer

Professionalism, punctuality, quality, responsiveness, value. Everyone was professional and offered amazing custom window service.

Christianna Sauer

Custom window project

The welded frames arrived square and the sizes matched our shop drawings exactly, which kept our install schedule intact on a tight remodel.

Project Superintendent

Residential remodel, Southern California
What They Say

Chosen by Builders Who Cannot Afford a Callback

Choosing the window and glass door system for a project is not as simple as it used to be. Frame material, thermal performance, glass make-up and hardware all interact — and the wrong combination shows up as condensation, sticking sashes or a failed inspection. We help you get the combination right before anything is cut.

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