Is the C.H.I. Stamped Carriage House an insulated garage door, and what is its R-value?

Carriage-house style can mean very different things in terms of thermal performance, depending on how the door is built and which insulation tier you choose. The C.H.I. Stamped Carriage House Collection gives buyers a clear range: uninsulated for detached storage applications, mid-range polystyrene for attached garages on a budget, and a polyurethane-injected R-16.55 top tier for homeowners who want premium carriage-house style alongside serious thermal performance. The choice between tiers depends on how the garage is used and how much heat loss through the door matters to your home's energy picture.

Three Insulation Tiers in One Collection

The Stamped Carriage House Collection is designed to scale from entry-level to high-performance while keeping the same visual style. The carriage-house detailing is stamped directly into the steel panel across all configurations.

Uninsulated: A single-layer steel door without an insulation core. Weight is lower. Cost is lower. Best suited to detached garages used for storage or parking where temperature control is not a goal. The carriage pattern reads the same from the street regardless of what is behind the steel skin.

Polystyrene (foam board): A rigid foam board is placed between the steel skins. Two R-values are available in this tier: R-7.94 and R-9.65. The difference between these two figures typically relates to foam density or thickness. Both represent solid mid-range insulation appropriate for attached garages in Colorado's metro climate.

Polyurethane (injected foam): Liquid foam is injected into the panel cavity and expands to bond against both steel faces. R-value of R-16.55. Polyurethane fills every void including around internal ribs, which polystyrene boards cannot do as completely. The bond to both steel faces also stiffens the panel and reduces sound transmission. This is the top-performance tier in the Stamped Carriage House line.

Insulation tier	Method	R-value	Best use
None	Single-layer steel	None	Detached, storage-only
Foam board	Polystyrene (EPS)	R-7.94 or R-9.65	Attached, budget-conscious
Injected foam	Polyurethane	R-16.55	Attached, heated, or high-performance

Why Insulation Tier Matters for Colorado Garages

Front Range winters test garage insulation consistently. Denver overnight lows drop into the single digits from December through February. The temperature differential between a heated living room and an uninsulated or poorly insulated garage can exceed 70 degrees on the coldest nights. That differential drives heat flow from the warm side to the cold side through every shared surface, including the garage door.

For attached garages, the garage door is one of the largest contributors to that heat loss. The Department of Energy notes that attached garages with inadequate door insulation can significantly reduce the temperature of adjacent rooms, increasing the heating load on the home's HVAC system.

Polystyrene at R-7.94 or R-9.65 addresses that heat flow meaningfully for most Denver metro attached garages. These insulation levels are sufficient to keep the garage from dropping to outdoor temperatures on all but the coldest nights, which limits how hard the garage air presses against the shared wall with the living space.

Polyurethane at R-16.55 goes further. It is worth the upgrade in these situations:

• The garage is attached to a bedroom or home office where temperature stability matters day and night
• The garage is used as a heated workshop where the space itself needs to be comfortable
• The home sits at high altitude (above 7,000 feet in mountain communities west of Denver) where the heating season is longer and overnight lows are colder
• Long-term energy cost reduction is a priority for a homeowner planning to stay in the home for 10 or more years

How Stamped Construction Affects Insulation Performance

The Stamped Carriage House Collection presses the carriage-house pattern directly into the steel panel. This is different from overlay-style carriage doors, which apply a separate decorative face over the steel base.

Stamped construction benefits insulation performance in a specific way: the interior side of a stamped panel is the same steel skin as the exterior, pressed in the same operation. There are no seams between a steel base panel and an applied overlay. When the polyurethane foam is injected, it fills behind the stamped profile uniformly. The result is a more complete fill across the full panel face than a foam board insert placed behind an overlay panel.

The carriage pattern on the stamped face does not compromise the insulation's integrity. The foam fills the space between the outer and inner steel skins regardless of the exterior profile detail.

Steel gauge is also relevant for Colorado hail performance. The Stamped Carriage House Collection is available in 25-gauge (Standard) and 27-gauge (Medium and Heavy Duty) steel configurations. A lower gauge number means thicker, stiffer steel. For hail resistance, 25-gauge resists impact better than 27-gauge.

For Front Range buyers in hail-exposed neighborhoods, asking whether the polyurethane R-16.55 tier is available in 25-gauge is worth confirming. Getting the highest insulation level and the heavier gauge in the same door is the best configuration for Colorado conditions.

Styles and Design Options

The Stamped Carriage House Collection includes two panel scale options:

Traditional carriage house: Standard-scale stile and rail pattern. Fits typical residential openings proportionally.

Oversized: Larger-scale panel pattern designed for wide or tall openings. A standard-scale carriage pattern on a 16-foot wide double-car door can look undersized. The oversized configuration maintains visual proportion in large openings.

Standard colors: White, Almond, Sandstone, Brown, Bronze, Gray, Desert Tan, Black, Graphite.

Wood-look finishes: Carbon Oak (Accents Woodtones, a deep textured wood-grain on steel) and Painted Woodtones options.

Powder coat: 188 colors available, covering virtually any exterior color scheme.

Window options include Plain, Frosted, Tinted, Obscure, Glue Chip, Seeded, Rain Glass, and Designer Glass. Decorative hardware (faux hinges, handles, bolt accents) can be added to reinforce the carriage-house character.

The 188 powder coat colors make the Stamped Carriage House one of the most color-flexible collections in C.H.I.'s lineup. For homeowners with a specific exterior palette, a custom powder coat match is almost always achievable.

G Brothers and the C.H.I. Stamped Carriage House

G Brothers installs the C.H.I. Stamped Carriage House Collection across the Denver metro and Front Range. The team helps buyers choose between the polystyrene mid-range and the polyurethane top tier based on how the garage is used and what adjacent living space requires.

Spring calibration is an important step on any insulated carriage-house door. The addition of insulation adds weight to the panel assembly. Springs must be sized to match. G Brothers calibrates springs at installation and checks door balance before completion.

Comparing the Stamped Carriage House to the C.H.I. Shoreline overlay model is a common question at the estimate stage. The Shoreline applies a separate overlay to the door's steel base. The Stamped Carriage House presses the pattern into the steel. The Shoreline delivers more visible depth and shadow. The Stamped model has fewer separate components and no overlay edges that can catch hail. For most Front Range buyers, the decision comes down to budget and hail exposure. G Brothers can show samples of both side by side.

At a glance: The Stamped Carriage House is a steel door. The pattern is pressed into the steel. The foam is EPS or polyurethane. R-16.55 is the top option. That is a high R-value. The steel is 25 or 27-gauge. Confirm the exact gauge with G Brothers. The door works well in Colorado. It holds up to hail. G Brothers installs across Denver.

Free estimates, same-day service on most repairs, licensed and insured, 24/7 emergency response across the Denver metro.