Ice & Cold

Build a Mors Kochanski super shelter

A Mors Kochanski super shelter is a small, insulated lean-to with a reflective inner back wall and a clear plastic front, warmed by an outside fire. You use it in cold conditions when you have suitable materials, ample firewood, and a safe place to maintain a fire. Radiant energy passes through the clear plastic and warms the interior, while the plastic reduces heat loss from moving air and the reflective lining redirects radiation inward. Correct the supplied layout before building: the fire belongs between the clear front and any external reflector wall, not behind that wall.

Ice & Cold 60 min practice Intermediate Choose a sheltered, level site with abundant legal firewood and enough open space to keep flame, sparks, and smoke away from the shelter. Avoid avalanche paths, dead overhead branches, deep organic ground that can smolder, and locations where wind will drive smoke toward the opening.

All skills

Topic summary

Key takeaways

The frame and lining remain secure, and the clear front stays separated from the occupant, bedding, and fire.
The fire is visible through the plastic along the sleeping area, with no reflector wall blocking it.
You feel warmth across the insulated resting area without scorching, softening plastic, or excessive interior heat.
The low inlet, high outlet, and exit remain open and accessible; absence of visible smoke alone is not proof of safe air.
Avoid: Putting a reflector wall between the fire and shelter blocks useful radiation, so place any external reflector behind the fire.
Avoid: Relying on a space blanket as ground insulation leaves you losing heat to the ground, so use a sleeping pad or a substantial dry insulating bed.

Intended uses

Ice & Cold skill (Intermediate, ~60 min practice)
Requires: Pruning or bow saw, Knife, Reliable fire-starting kit, Shovel for preparing the fire site and keeping extinguishing material ready

Climate suitability

Choose a sheltered, level site with abundant legal firewood and enough open space to keep flame, sparks, and smoke away from the shelter. Avoid avalanche paths, dead overhead branches, deep organic ground that can smolder, and locations where wind will drive smoke toward the opening.

Mors Kochanski — The Super Shelter Watch on YouTube

Safety: Keep plastic, reflective film, bedding, and lashings well clear of flame and radiant heat intense enough to damage them; a body-length spacing is only a starting point, not a safety guarantee. Maintain an unobstructed exit, keep extinguishing material ready, and never leave the fire unattended or depend on it as your only protection from cold.

Required tools

Pruning or bow saw
Knife
Reliable fire-starting kit
Shovel for preparing the fire site and keeping extinguishing material ready

Required materials

Sturdy frame poles and stakes
Cordage
Space blanket or reflective tarp
Clear plastic sheeting
Dry firewood and an insulating sleeping pad or legally gathered bedding

Step-by-step

Build a lean-to frame with the open side facing a fire reflector wall.
Why: A stable, low lean-to creates a small space that is easier to warm and protects the occupant from wind. Arrange the open side to face the fire area, with any external reflector beyond the fire so it cannot block radiation reaching the shelter.
Hang a space blanket or reflective tarp on the inside back wall.
Why: An inward-facing reflective lining redirects some radiant energy toward the occupant rather than allowing it to be absorbed by the back wall. Secure it against flapping and tearing; it does not replace insulation beneath you.
Drape clear plastic sheeting across the open front, leaving a small gap at the bottom for air and a vent at the top.
Why: The clear front admits radiant energy from the fire while limiting drafts and retaining warmed air. Keep a low air inlet and a high outlet open, recognizing that these gaps do not guarantee protection from smoke or carbon monoxide.
Build a long-log fire a body-length away on the other side of the reflector.
Why: A long fire distributes radiant warmth along your sleeping space. Do not follow the stated 'other side of the reflector' placement: put the fire between shelter and reflector, secure logs against rolling, and adjust the distance to prevent scorching or melting.
The plastic traps radiant heat while the reflector bounces it back toward you.
Why: The useful effect is incoming radiation warming you and interior surfaces while the plastic limits convective heat loss and the inner reflective wall redirects radiation. The plastic does not simply trap all radiant heat, and an external reflector is not a substitute for a clear view of the fire.

Common mistakes

Putting a reflector wall between the fire and shelter blocks useful radiation, so place any external reflector behind the fire.
Relying on a space blanket as ground insulation leaves you losing heat to the ground, so use a sleeping pad or a substantial dry insulating bed.
Sealing the plastic to chase extra warmth creates an unsafe enclosure, so keep both vents open and enlarge the opening if heat or smoke accumulates.
Building an oversized fire risks melting the front and igniting bedding, so begin with a modest fire and increase warmth only while checking all exposed materials.
Leaving the plastic loose allows drafts and contact with hot materials, so secure its edges while preserving ventilation and an easy exit.

Troubleshooting

If the interior stays cold, then check ground insulation, unwanted drafts, and whether the fire has an unobstructed view of the clear front before adding fuel.
If plastic softens, shrinks, or discolors, then move away from the exposed area and reduce or extinguish the fire before changing its placement.
If smoke enters or you develop headache, dizziness, or nausea, then leave immediately for fresh air and do not re-enter until the fire and airflow problem is corrected; carbon monoxide itself has no smell.
If condensation becomes heavy or the shelter feels excessively hot, then enlarge the upper opening and reduce the fire rather than closing other vents.

Field practice drill

In a permitted practice area, spend about an hour building a one-person frame, fitting the reflective lining, insulating the bed, and securing a vented clear front. First check stability and rehearse exiting without disturbing the frame; then use a small, continuously attended fire to compare warmth at the head, middle, and foot of the bed and inspect the plastic frequently. Finish by fully extinguishing the fire and removing your materials; do not make your first trial an overnight cold-weather dependency.

Indicators of success

The frame and lining remain secure, and the clear front stays separated from the occupant, bedding, and fire.
The fire is visible through the plastic along the sleeping area, with no reflector wall blocking it.
You feel warmth across the insulated resting area without scorching, softening plastic, or excessive interior heat.
The low inlet, high outlet, and exit remain open and accessible; absence of visible smoke alone is not proof of safe air.

Related outdoor skills

Educational reference only. Wilderness conditions change fast — practice in low-stakes settings, take a certified wilderness first-aid course, and confirm regional regulations before you rely on any of these skills in the field.