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Alloy Oven

ANCIENT ROOTS,
MODERN OVENS.

INTRODUCING: Opus One

Mortarless. Multi-fuel. Made-to-Last.
A true retained-heat oven engineered for versatility, serviceability, and decades of use. U.S. Patent Pending. Founder's Edition, from $6,795

The problem: We want amazing outdoor meals but . . .

We don't want a huge permanent commitment.

Traditional masonry retained-heat

  • Large project:
    Specialists, easy to mismanage
  • Permanent:
    Fixed layout and function
  • Cracks/maintenance:
    Inevitable with mortar
  • Sunken cost:
    Hard to recover on resale

We don't want the portable compromises.

Live-fire only metal ovens

  • Demanding to run:
    Constant tending
  • Limited range:
    Bread and roasts are hard
  • Small & slow:
    Tiny pies, long recovery
  • Durability:
    Components fail, deteriorate

You've done the research.
You know what real retained heat can do.
Retain the heat, skip the concrete.

See how we retain the heat
Founder portrait
Taken Nov 2025, Jim with the Rev. 2 Prototype built Aug 2021

Founder's Note

I'm Jim. I've spent 20+ years making the most reliable VW engine swap system on the market. VW Vans and Alloy Ovens may seem like worlds apart, but as I like to joke they're almost the same thing: both are exterior sheet metal and internal combustion.

Outdoor cooking might be my favorite thing, and I wanted a real retained-heat wood oven without the scale and pricetag of a home addition. So I built what I couldn't find: a low-hassle, true retained-heat oven that can move with you. I'm ready to build yours.

Jim, Founder & Engineer

20+
YEARS IN BUSINESS
4,000+
Bostig Customers

Opus One: the modern brick oven

The culmination of 6 years of design and four generations of prototypes.

How we retain the heat

Heat-up and cool-down thermal performance graph

MORTARLESS MASS

Goldilocks-zone thermal performance with stamina and stability. Pay attention to your guests not your oven.

View specifications
Stainless steel shell cutaway

STAINLESS SHELL

The tight gaps, overlaps, and multi-layers of the stainless outer shell and cassette core manage flow instead of mortar. Result: true retained-heat efficiency of a mortared oven, minus the failure points.

Swipe to explore →

Six years. Four generations. Hundreds of hours of instrumented fires. We set out to preserve the soul of a brick oven and redesign everything that made it fragile and permanent.

THE CASSETTE SYSTEM

A cassette is our modular brick holder: a stainless steel frame that holds four firebricks in precise alignment without mortar. Think of it as a cartridge: slide out a damaged brick, slide in a replacement. No mason required.

This is the core innovation that makes Alloy different. Traditional ovens use mortar to hold bricks in place, but mortar cracks from thermal cycling and moisture. Our cassettes use gravity, geometry, and stainless bands (for mobile/trailer applications). Bricks are locked together, with gaps controlled by the stainless frame.

THE FLUE

THE FLUE

Moving the flue further from the operator isn't just nice for not getting smoke in your face, it also has additional function. It allows better firebrand (ember) settleout, and provides room for catalyst inserts if needed to satisfy local regulations. Because we did it correctly, all this happens while not degrading the flow and draft, and without changing the traditional front vent location relative to the dome.

THE DOOR SYSTEM

The front door uses a multi-hinge system that works either direction. Open it with your right hand and it swings left. Open it with your left hand and it swings right. Grab it with both hands and pull straight back to remove it completely for full open-flame access.

This isn't just a convenience feature; it's designed for real cooking workflows. When you're managing a fire and food at the same time, you need access from whichever side your hands are free.

DESIGNED FOR REALITY

DESIGNED FOR REALITY

My wife and I don't plan to stay in this house forever. Building a traditional permanent oven would mean leaving thousands of dollars in concrete behind. Honestly, buyers often see them as a liability, not a feature. That's why I needed an oven that could move with us.

During the pandemic, brick became hard to source, and we had to switch suppliers multiple times. That's when we discovered how much 'standard' bricks actually vary, sometimes by as much as 3/8 inch. Traditional masons account for this with thick mortar joints. We took a different approach: we designed the mortarless cassettes to accommodate the full range of variation. The result is a system that works with real-world materials, not just spec sheets.

This also means you can source your own brick if you prefer. We offer the oven system without firebricks for people who want to buy locally or tune their own configuration.

Opus One oven with door open showing interior

"A LEGACY PIECE, NOT A DISPOSABLE APPLIANCE"

Built to be repaired, not replaced. An outdoor centerpiece designed to serve for decades.

Alloy Oven Opus One. U.S. Patent Pending.

WHY ALLOY VS. TRADITIONAL BRICK OVENS

01

MORTARLESS, MODULAR ARCHITECTURE

Patent-pending stainless rib-and-spar frame with replaceable brick cassettes. No mortar, no curing cycles, no vulnerability to over-firing or moisture.

02

TUNABLE RETAINED-HEAT PERFORMANCE

Mix brick densities and suppliers to balance heat-up speed with multi-hour retention. Includes Pyrogel® insulation for unmatched thermal efficiency.

03

INTERCHANGEABLE FUEL SYSTEMS

Wood & gas by default, with door-module options for charcoal, pellet, and electric. Swap or combine fuels to match your cooking style.

04

LIFETIME SERVICEABILITY

Replace individual bricks or cassettes, not the oven. Modular construction and rear-door access reduce downtime and extend usable life for decades.

05

TRANSPORTABLE AUTHENTICITY

True retained-heat performance without permanent construction. Assemble with basic tools, then relocate without demolition, cranes, or contractors.

06

ENGINEERED EXHAUST PATH

Front-origin duct flows over the dome to a rear insulated chimney, improving draft, settling embers, and keeping the outlet farther from the cook.

07

REFINED INDUSTRIAL DESIGN

Sleek stainless form with engineered weather resistance. Crafted to elevate outdoor kitchens while withstanding the elements.

IT’S TIME

Early build slots, launch pricing, and trade-only spec packs for qualified pros.

JOIN THE LAUNCH LIST U.S. Patent Pending

SPECS SNAPSHOT

Cooking Capacity

Top-down view of cooking floor showing capacity for two 16-inch pizzas.

Two 16" pizza capacity, large 1,260 sq in cook floor

DIMENSIONS

  • 58"H × 55"D × 50"W overall
  • 35.4"W × 35.6"D cook floor
  • 1,260 sq in cook area
  • 62% dome-to-door height ratio

WEIGHT

  • 1,900 lbs fully loaded
  • ~150 lbs frame only

PERFORMANCE

  • 1200°F max cooking temp
  • 90-120 min heat-up (wood)
  • 8-12+ hours heat retention above 400°F

FUEL

  • Wood and gas included
  • Charcoal, pellet, electric in development

CONSTRUCTION

  • Stainless steel frame and shell
  • All gaps <5mm (pest-proof)
  • Modular brick cassettes
  • Pyrogel® insulation included

FIREBRICKS

  • 212 required (220 suggested for overage)
  • Standard 2.5" x 4.5" x 9" firebricks
  • Included with Opus One, source your own with Core

ASSEMBLY

  • ~4 hours, 2 people, basic hand tools

Dimensions

FAQ

Common questions about the Opus One retained-heat oven.

What's the difference between Opus One and Opus One Core?

Opus One Core is the oven skeleton at $6,795. It allows you to choose your own source and densities of firebricks. The oven requires 212 standard 2.5" firebricks. We suggest purchasing 220 to account for any breakage. Opus One includes the skeleton plus all firebricks at $8,795. Both use the same patent-pending cassette system and skeleton.

How much does it cost?

Opus One Core is $6,795 (firebricks not included). Opus One is $8,795 (firebricks included). The matching stainless stand is $2,495. Founder's Edition pricing: Core at $6,795, Full at $8,795, stand at $2,195. Founder's Edition is limited to the first 75 units.

What do Founder's Edition buyers get?

Beyond the pricing, Founder's Edition buyers get free shipping and can choose their hinge block accent color. Standard production units ship with a warm bronze Cerakote finish on the hinge blocks. Founder's Edition buyers can pick from additional color options to match their outdoor space.

When can I get one?

We're targeting Founder's Edition production starting March 2026, in time for next season. Join the launch list for updates and first crack at build slots when ordering opens.

Where is it made?

Designed and built in the US.

Is this a "pizza only" oven?

No. Pizza is the obvious one, but bread, roasts, and long bake-downs on stored heat are really where this thing shines. You fire it once and cook for hours. Neapolitan pies first while it's ripping hot, then bread as it settles, then a roast as it slowly cools down.

How long does it hold heat?

This is the whole point of retained heat vs. live fire. After a full firing, you'll have usable baking temps (400°F+) for 8 to 12 hours or more. Fire it Friday evening, bake bread Saturday morning without relighting.

How does this compare to an Ooni or Gozney?

Those are good live-fire ovens. Great for pizza nights when you want to tend a fire. The Opus One is a different thing entirely: real thermal mass that stores heat for hours. Better for multi-course cooking, bread, roasts, and situations where you don't want to babysit the fire all night. It's also a lot heavier and more substantial, without actually being permanent.

How does this compare to a traditional masonry oven?

Same cooking performance. We kept the authentic dome ratios and thermal mass that make brick ovens work. The difference: no mortar to crack, no curing cycles, no permits for permanent construction, and you can take it with you when you move. Traditional masonry runs $15,000 to $30,000 installed and stays with the house forever. The Opus One is $8,995, goes together in a day, and goes wherever you go. No crane, no mason, no curing time.

How hot does it get?

Max cooking temperature is 1200°F. Floor temps for Neapolitan pizza run 850-950°F. The dome and thermal mass hold that heat for hours of cooking across a wide range of temperatures.

How long to heat up?

90 to 120 minutes to pizza temps with wood, depending on your brick configuration and conditions. Here's something the mortarless design allows: you can fire harder and faster than you could with a mortared oven. Firing levels that would be "overfiring" and cause damage in traditional masonry are fine here because there's no mortar to stress. So if you're in a hurry, push it.

What fuels does it support?

Wood and gas are both included standard. Modules for charcoal, pellet, and electric are in development. The modular design means you can swap or combine fuel systems as your needs change.

How much does it weigh?

Around 1,900 lbs fully loaded with bricks. Under 150 lbs for the stainless frame alone. The heaviest single piece during assembly is manageable for two people.

What are the clearance requirements?

Recommended minimums: 3 feet from combustible walls and fences, 5 feet overhead clearance, and 10 feet from windows and doors. These are general guidelines based on industry standards for outdoor cooking equipment. Always check your local building codes, as requirements vary by jurisdiction. Detailed installation guidelines are in the Owner Planning Kit.

How hard is assembly?

Two people, basic hand tools, half a day. The frame bolts together, bricks load into cassettes (the modular trays that hold the firebricks), and cassettes slide into the frame. No masonry skills, no mortar, no curing. We provide detailed instructions and video.

Can I install it myself or do I need a pro?

Most handy homeowners can handle assembly. The hard part is moving 1,900 lbs of components into position. You may want help with that. We're building an installer network for people who prefer professional setup.

What foundation does it need?

A level surface rated for the weight, roughly 100 lbs per square foot. A 4-inch concrete pad works well. Existing patios may work if they're in good shape. Foundation specs are included in the Owner Planning Kit.

Do I need permits?

In most places, no for outdoor installation. It's not a permanent structure. But check your local codes. The rear flue can take catalyst inserts if your area has emissions requirements.

Can I move it?

Yes. That was the whole point. I wanted a real brick oven I could take with me when we sell our house. Assemble with basic tools, relocate without demolition or cranes. Disassembly is just assembly in reverse.

Is it weather safe?

The stainless shell handles the elements. Rain, snow, freezing temps. No covers required, no special storage. The mortarless design actually does better in freeze-thaw cycles than traditional masonry because there's no mortar to crack. And all gaps in the shell are under 5mm, so mice and pests can't get in.

What if a brick cracks?

Swap the brick. That's the point of the cassette system (the modular brick trays). Individual bricks slide out and replacements slide in. No demolition, no rebuilding, no contractor. Replacement bricks are standard firebrick from multiple suppliers.

How do I clean and maintain it?

The rear of the oven has swing-open service doors. No other oven has this. You can brush ash straight out the back in seconds. Beyond that, occasionally check bricks. That's about it. No mortar joints to monitor, no repointing, no annual sealing. The stainless shell wipes clean.

Do you need rear access to clean it?

No, rear access is not required. The oven can be cleaned from the front like a traditional brick oven. However, rear access does make cleaning faster and easier if your installation allows for it.

What does the oven sit on?

A stand or built-in base rated for the weight. We offer a matching stainless steel stand for $2,495 (or $2,195 for Founder's Edition). You can also build the oven into a masonry or steel outdoor kitchen island. Load specs and dimensions are in the Owner Planning Kit.

Is a stand included?

No, the stand is separate. This is standard for ovens in this category and lets you choose the right setup for your space. Some people want the stand, some want to build it into an island.

Can I build it into my outdoor kitchen island?

Yes. We provide structural requirements, weight distribution specs, and clearances. Your base needs to handle about 1,900 lbs and meet clearance requirements.

How do I get support if something goes wrong?

You talk to me. Email, phone, whatever works. This isn't a big faceless company. I stand behind what I build. Same as Bostig customers have experienced for 20+ years.

What's the warranty?

We're finalizing warranty terms. Expect multi-year coverage on the frame and structure. Bricks are consumable but designed to last years under normal use, and easy to replace when they don't.

Is the oven designed to meet safety standards?

Engineered to pass UL/ULC certification, certification testing is the next milestone.

How is it shipped?

The stainless frame, shell, cassettes, and hardware ship UPS in multiple boxes. The firebrick ships freight on a pallet. Shipping costs vary by location. We'll provide quotes when ordering opens.

Can I source my own brick?

Yes. We offer a Frame Kit option without brick for people who want to source firebrick locally or configure their own brick setup. The mortarless cassette system is designed to accommodate the size variation you'll find across different brick suppliers. This also lets you tune the thermal performance by mixing brick densities if you want to experiment.

How does the door work?

The front door swings on a multi-hinge system that works either direction. Open it with your right hand and it swings left. Open it with your left hand and it swings right. Grab it with both hands and pull straight back to remove it completely for full open-flame access.

How much weight can the stand hold?

The stand is rated for 3,000 lbs, well above the oven's loaded weight. We built in a healthy safety margin.

Can I finance it?

We're looking into financing options. If that matters to you, join the list and let us know.

Choose Your Opus One

Same oven, same performance. One option lets you source your own firebricks.

Opus One Core

Source Local, Save More

$6,795 Founder's Edition

$7,995 regular price

  • Complete stainless skeleton and cassettes
  • Wood and gas fuel systems included
  • Choose your own firebrick source and densities
  • Firebricks not included (212 required)

Ships UPS Ground (free for Founder's Edition)

Reserve with $800 deposit

Opus One

Everything Included

$8,795 Founder's Edition

$9,995 regular price

  • Complete stainless skeleton and cassettes
  • Wood and gas fuel systems included
  • All 212 firebricks included
  • Complete, nothing else to source

Split ship: UPS + LTL freight (free for Founder's Edition)

Reserve with $1,000 deposit

Both options use the same patent-pending cassette system and skeleton.Stand sold separately ($2,195 Founder's Edition).

Ready to cook with modern retained heat?

Reserve Your Opus One

FOUNDER'S EDITION — LIMITED TO 75 UNITS

Secure your Founder's Edition build slot with a refundable deposit.

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