Northwest Door Infinity Classic 7800 Collection

Overview

Few garage doors can claim to look like they belong on a custom home. The Northwest Door Infinity Classic 7800 is one that earns that claim. This is a premium aluminum-framed carriage-house door. Its specification level is more common in the commercial and custom residential market than in standard retail garage door lines.

The 7800 is produced by Northwest Door in partnership with Hormann, the German door manufacturer. It reflects that company's focus on extruded aluminum construction. The frame is 6063-T5 extruded aluminum. This alloy provides high strength at low weight. It holds a powder-coat finish well. The overall door section is 2 inches thick.

Carriage-house styling here means more than a decorative overlay. The 7800 is available in 2-panel, 3-panel, and 4-panel configurations. Optional V-groove insulated panels add texture within each section. Custom arched tops are available for homeowners who want to match an existing radius-top architectural opening. That level of customization is uncommon in the mid-market segment. It places the 7800 firmly in the premium tier.

G Brothers installs the Infinity Classic 7800 in the Denver metro and across the Front Range. For homeowners building or renovating a traditional or transitional home, this collection deserves a serious look. It is built to carry its architectural weight.

Construction and materials

The Infinity Classic 7800 is built on a 6063-T5 extruded aluminum frame with 0.050-inch thick aluminum panels. The 6063-T5 designation covers both the alloy composition and the temper treatment. The alloy contains aluminum, magnesium, and silicon. T5 means the material is air-cooled and artificially aged. That gives the frame high stiffness and good corrosion resistance. It does so without the weight of steel.

The panel construction is a 3-layer sandwiched design: aluminum exterior, 1/2-inch EPS polystyrene core, and aluminum interior. The EPS core is the same rigid foam used in most quality insulated steel doors. It is moisture-resistant and stable. It reduces heat transfer well.

With optional insulated thermo-pane windows installed, the door achieves an average R-value of R-5.6. This is lower than a typical insulated steel sandwich door. The difference comes from aluminum's higher thermal conductivity. Aluminum conducts heat more readily than steel. The frame area pulls down the overall assembly R-value. For most carriage-style applications, R-5.6 is adequate. Homeowners with heated living space above the garage should consider this when comparing options.

The standard finish on the frame is White Polycron III, a premium painted finish. Optional woodgrain and solid color powder coats are available and are a key differentiator for this collection.

Styles, colors, and window options

The Infinity Classic 7800 is produced in carriage-house designs across multiple panel configurations. The design language emphasizes vertical sectioning and traditional proportions. Options include:

• 2-panel, 3-panel, and 4-panel horizontal section configurations
• Optional V-groove insulated panels for added texture within each section
• Custom arched tops to match radius-top openings in traditional and formal home designs

The custom arched top option is worth highlighting. Most garage door manufacturers offer rectangular sections only. The 7800 can fit arched masonry openings or custom trim profiles. No filler panel above the door is needed.

Colors: The standard finish is White Polycron III. Optional finishes include woodgrain powder coats in Mahogany, Dark Walnut, Dark VG Fir, Light VG Fir, Dark Ash, Light Ash, Dark Cherry, and Light Cherry. Solid color powder coats in additional colors are also available. The woodgrain powder-coat options are a key feature of the 7800. They give it a wood appearance with aluminum's durability. No wood maintenance is needed.

Window options: Standard glass is 1/8-inch clear tempered glass. Optional glass types include:

• Insulated thermo-pane (also contributes to the R-5.6 rating when installed)
• Tinted: Grey, Bronze
• Obscure: Mistlite, Satin Etch, P516, Gluechip, Greylite, Rain
• Custom thicknesses up to 9/16 inch
• Simulated true divided lites for a formal, multi-pane appearance

The simulated true divided lite option creates the look of individual panes. It separates this door from standard carriage-house designs. Most competitors use single-pane inserts with grille overlays instead.

Specifications at a glance

Specification	Detail
Collection	Northwest Door Infinity Classic 7800
Frame material	6063-T5 extruded aluminum, 2" thick
Panel material	0.050" aluminum panels
Construction	3-layer sandwich (aluminum + 1/2" EPS + aluminum)
Insulation type	EPS polystyrene core
R-value	R-5.6 average (with insulated thermo-pane windows)
Configurations	2-panel, 3-panel, or 4-panel; optional V-groove; custom arched tops
Standard color	White Polycron III
Optional colors	8 woodgrain powder coats; solid color powder coats
Standard glass	1/8" clear tempered
Optional glass	Insulated, tinted, obscure, custom thickness; simulated true divided lites
Warranty	Limited Lifetime (door); component warranties vary - confirm with dealer

Is it right for your Colorado home, and how G Brothers helps

The Northwest Door Infinity Classic 7800 suits Colorado homeowners who want a premium carriage-house door with real design flexibility. The woodgrain powder-coat finishes, custom arched tops, and simulated divided-lite windows set this collection apart. Most standard carriage-house steel doors do not offer any of these features.

Front Range fit: The aluminum frame on the 7800 provides several advantages in Colorado's climate. Aluminum does not rust. Road salt near Denver metro highways is not a corrosion concern for the frame. Aluminum also does not warp or swell. Colorado's monsoonal summer afternoons and dry winter cold create moisture swings that aluminum handles without issue.

The powder-coat finishes used by Northwest Door and Hormann hold color well at Colorado's altitude. UV intensity is higher at the Front Range than at sea level. A powder coat holds color and gloss better than liquid paint in high-UV conditions.

The R-5.6 insulation value is adequate for most Front Range carriage-house applications. It is best suited to detached garages or homeowners who accept lower thermal performance in exchange for design quality. If the garage is attached to the house, compare this R-value against insulated steel alternatives first. The 7800's strengths are design and durability. Maximum thermal resistance is not its goal.

Hail is a consistent threat on the Front Range. Aluminum can dent under severe hail. The 0.050-inch panel thickness and 3-layer sandwich provide reasonable resistance to typical hail.

Who this door suits: The Infinity Classic 7800 is most often chosen by homeowners on larger renovation projects or new custom builds where attention is being paid to every exterior detail. The ability to match a dark woodgrain finish to wood elements elsewhere on the house sets this collection apart. Fitting an arched opening with a properly arched door is also a capability that very few other door lines offer.

How G Brothers helps: G Brothers is a Denver-based garage door company covering the Front Range. The team installs Northwest Door products and can help you navigate the 7800's configuration options. Panel count, woodgrain finish, glass type, and arched top can all be specified to build a door that fits your home's architecture. Call G Brothers for a free estimate.