Elev8150
Build Concept
Lavacrete walls. Passive solar design. Frontier-milled timber. A backcountry lodge engineered specifically for 8,150 feet in southwest Montana — non-combustible, thermally massive, and built by the family living here.
Why We're Building
With Lavacrete
Most people build with wood because that's what contractors know. We're building with lavacrete — a cement-stabilized volcanic aggregate wall system — because it solves five of our hardest problems at once. This isn't novelty. It's an engineering decision made specifically for 8,150 feet in southwest Montana.
Forest Fire Survival
Southwest Montana burns. Wildfire is not a hypothetical risk at Elev8150 — it's a seasonal reality at elevation. Lavacrete walls are non-combustible. They don't burn. They don't rot. For a remote backcountry lodge that guests will trust their safety to, non-combustible walls aren't optional.
Lower Heating Costs
Our winters are long, cold, and expensive to heat. Lavacrete gives us both insulation and thermal mass in a single wall system. The south-facing passive solar design charges the lavacrete walls and slab like a heat battery during the day. At night, those walls release stored heat slowly and steadily — dramatically reducing heating costs.
Build Speed
At 8,150 feet we have a short window between snowmelt and the first hard freeze. Lavacrete forms strip in roughly 24 hours and lifts can stack every few days — meaning we can realistically raise walls in a single Montana season. That speed is the difference between a project that advances every year and one that stalls.
We Haul Our Own Aggregate
Lavacrete uses scoria or pumice — volcanic material abundant in southwest Montana. For most builders, aggregate delivery cost makes this system financially impractical. We own a semi. We haul our own loads, test our own mix, and blend with local material. That turns a cost barrier into a competitive advantage.
Freeze-Thaw Durability
Wet plus freeze destroys most building materials over time. Lavacrete is cement-stabilized and handles moisture cycling dramatically better — with far less ongoing maintenance. For a remote property where every maintenance run requires a snowmobile, long-term durability is not optional.
Structure · Insulation · Thermal Mass · Moisture Durability
— In One Wall
Most building systems give you one or two of those. Lavacrete gives you all four. Combined with passive solar design and Frontier-milled interior timber framing, the result is a lodge that survives fire seasons, holds heat through Montana winters, and is built from the mountain it sits on.
The bottom line: Lavacrete + passive solar + Frontier-milled timber framing = a lodge that survives fire seasons, holds heat through Montana winters, and is built from the mountain it sits on.
How lavacrete is built — image series
Passive Solar Design
At 8,150 Feet
The lodge is oriented south to capture maximum winter sun through floor-to-ceiling Pella solarium windows. The lavacrete walls and concrete slab act as a thermal battery — absorbing heat during the day and releasing it slowly through the night. No grid required.
Combined with the Victron Energy off-grid solar system, the lodge is engineered to operate indefinitely at elevation without any grid connection — through blizzards, fire seasons, and Montana winters that last six months.
Floor-to-ceiling Pella windows on both floors face south, capturing winter sun. The deep roof overhang blocks high summer sun from overheating.
Walls and slab absorb solar heat during the day and release it steadily overnight — stabilizing interior temperature without active heating systems.
Roof solar panels feed a Victron Energy system — the same technology documented in their international branded documentary filmed at Elev8150.
A wood-burning chimney provides backup heat for extreme cold events — fuelled by timber milled and managed on the property with the Frontier sawmill.
The Floor Plan
These are the actual architectural drawings for the Elev8150 Passive Solar Lodge. Two floors, two solariums, a full professional kitchen, and a south-facing deck overlooking the Montana backcountry. Not a concept — a real engineered building.
- Kitchen — professional grade
- Living room
- Master bedroom
- Mud room + pantry storage
- Laundry room
- Office
- South-facing solarium
- Large south deck
- Loft open space
- Second solarium
- North-facing loft windows
- Mountain views all sides
- 8,150 ft elevation
- Snowmobile access only (winter)
- 100% off-grid power
- Lavacrete exterior walls
- Frontier-milled timber interior
- Passive solar primary heat
- Victron Energy system
- Zero grid connection
Built For This Specific Place
Every material and design decision at Elev8150 was made for one reason: it had to work at 8,150 feet in southwest Montana, built by a self-build family crew in a short mountain season, and last for generations.
Cement-stabilized volcanic aggregate. Non-combustible, thermally massive, freeze-thaw resistant.
Volcanic pumice and scoria from southwest Montana. Hauled by the family's own semi.
Trees from the property milled on-site using the Frontier sawmill — sponsor provided.
South-facing solariums charge lavacrete thermal mass. Heat released overnight with no active systems.
Full off-grid solar system documented in Victron's international branded documentary.
High-performance south-facing glazing on both floors. Engineered for high-altitude Montana solar gain.
On-property timber supply. Chimney flue on east profile. Zero dependence on propane delivery.
Winter access by snowmobile only. No road. The remoteness is engineered into the experience.
100% off-grid. Designed to operate indefinitely without any utility connection at any season.
Interior concept images
Supported & Documented
By Industry Leaders
Three independent organisations have committed their resources and reputations to Elev8150. Equipment sponsors don't back concepts — they back proven projects.
Featured on Ben Fogle: New Lives in the Wild — Season 21, Episode 3. BBC / Channel 5 production crew documented the Bellrose family's life at Elev8150.
Watch the episode →Victron Energy filmed a full branded documentary at Elev8150 featuring the off-grid solar system. The same system now powers the lodge build.
Watch the documentary →Frontier Sawmill provided a free sawmill to Elev8150 — enabling the family to mill interior timber framing directly from trees on the property. The walls and framing are built from this land.
norwoodsawmills.com →"I was Elev8150's first supporter — I've been with this family since the very beginning. They claw their way through every struggle and every difficulty this mountain throws at them. Their absolute refusal to give up is what I love most."— Connie Brashear, Founding Backer · Tier 4 Legacy Culinary Patron
