Permanent Shelter
Why This Matters
An emergency shelter keeps you alive for days. A permanent shelter keeps you alive for decades. It protects your food stores from rain and animals, gives you a dry workspace for crafting, and maintains body temperature through extreme weather without constant fire-tending. Throughout history, the shift from temporary to permanent shelter marks the exact moment a group of survivors becomes a settlement. Every hour spent building a proper structure pays back a thousand hours of comfort and safety.
Fundamental Principles
Every permanent shelter must address five problems:
- Load bearing — the structure must support its own weight plus snow, wind, and occupants without collapsing
- Weather envelope — roof and walls must shed rain, block wind, and resist snow loads
- Thermal management — insulation to retain heat in winter, ventilation to prevent overheating in summer
- Moisture control — keep ground moisture from wicking up and condensation from rotting the structure
- Fire safety — a cooking fire inside must not burn the building down
What You Need
Essential tools:
- Axe or heavy chopping tool (stone axe minimum — see Knots & Cordage for lashing a stone head)
- Saw — even a crude wire saw or serrated stone edge speeds work enormously
- Digging tools — sharpened stakes, flat stones, improvised shovels
- Measuring cord — a fixed-length rope for consistent dimensions
- Plumb line — any weight on a string (checks vertical alignment)
- Level — a trough of water or a straight stick with a water-filled groove
For timber frame:
- Straight trees 15-25 cm diameter, 3-6 meters long (pine, oak, poplar)
- Cordage or wooden pegs for joinery
- Bark, thatch, or split wood for roofing
For adobe/cob:
- Clay-rich soil (at least 20-30% clay content)
- Sand
- Straw, dried grass, or animal hair (fiber binder)
- Water
- Wooden forms (for adobe bricks) — simple rectangular box, open top and bottom
For stone:
- Flat-faced stones of varying sizes
- Clay or lime mortar (see Lime and Cement)
- Wooden lintels for door and window openings
Step 1: Site Selection
Choosing the wrong location wastes all your building effort. Evaluate every potential site against this checklist:
Must Have
- High ground: At least 2 meters above the nearest waterway’s flood line. If you can see flood debris (deposited branches, silt lines on trees), build above that line.
- Drainage: Water must flow AWAY from the building in all directions. A gentle slope (3-5%) is ideal. Dead flat ground pools water against foundations.
- Solar exposure: In cold climates, the longest wall should face south (northern hemisphere) to capture winter sun. In hot climates, minimize east/west wall exposure.
- Water access: Within 200 meters of a reliable water source.
- Building materials nearby: Hauling timber or stone more than 500 meters adds enormous labor.
Must Avoid
- Flood plains: Even “100-year” floods happen. Look for high-water marks on trees and banks.
- Hilltops: Maximum wind exposure, lightning risk.
- Under dead trees: “Widow makers” — dead branches fall without warning.
- Unstable slopes: Any slope over 15 degrees risks landslide, especially after deforestation.
- Insect zones: Standing water, swampy areas (mosquitoes), or large ant colonies nearby.
Step 2: Foundation
Every permanent structure needs a foundation that does three things: distributes building weight to the ground, prevents the structure from shifting, and keeps moisture away from walls.
Rubble Trench Foundation (Simplest Effective Method)
- Dig a trench following your building footprint, 40-60 cm wide and 40-60 cm deep (below the frost line if possible — in cold climates this may be 90-120 cm).
- Fill with tightly packed rocks and gravel, tamping every 15 cm layer.
- The top of the rubble should be 10-15 cm above surrounding ground level.
- Lay flat stones or a log sill plate on top as a level building surface.
Stone Pier Foundation (For Timber Frames)
- Dig holes at each corner and every 2-3 meters along walls, 40 cm diameter and 40-60 cm deep.
- Stack flat stones in each hole, building a pier up to 20-30 cm above ground level.
- Place timber sill beams across the piers.
- The air gap under the floor prevents moisture wicking.
Key Rule
The bottom of any wall material (wood, adobe, stone) must be at least 15 cm above ground level. Ground contact rots wood and dissolves adobe. Use stone, gravel, or rubble to bridge from ground to wall.
Step 3: Sizing Your Structure
Start small. A single-room structure of 3 x 4 meters (12 square meters) is enough for 2-4 people and can be built by 2 people in 2-4 weeks. This provides:
- Sleeping area: 6 square meters (1.5 x 4m along one wall)
- Living/cooking area: 4 square meters
- Storage: 2 square meters
Ceiling height: Minimum 2 meters at the peak for comfort and smoke clearance. 2.5 meters is better. Low ceilings trap smoke and feel oppressive.
Door: Face the door away from the prevailing wind direction. Standard door: 80 cm wide, 180 cm tall. Build the threshold 10 cm above ground to keep water out.
Windows: One window on each wall provides cross-ventilation. Keep window area small (40 x 40 cm) in cold climates, larger in warm climates. Cover with oiled animal skin, woven cloth, or wooden shutters.
Method 1: Timber Frame Construction
The fastest method if you have access to straight trees. A timber frame can last 100+ years if properly built and maintained.
Step 1 — Select and Prepare Timber
Choose straight trunks 15-25 cm diameter. Pine, oak, ash, and poplar are all suitable. Freshly cut (“green”) timber is easier to work but will shrink as it dries — leave 5-10% extra in joint sizes to accommodate shrinkage. Ideally, timber should be cut and dried for 3-6 months before building, but you can build green if necessary.
Strip all bark immediately. Bark traps moisture and harbors insects that will eat your structure.
Step 2 — Build the Sill Frame
Lay your four longest, straightest timbers on the foundation to form a rectangle. These are your sill plates — everything else sits on them.
Join corners with one of these methods:
- Lap joint: Cut half the thickness from the end of each timber where they overlap. The two halves interlock flat. Pin with a wooden peg driven through both pieces.
- Notch joint: Cut a matching notch in each timber. Simpler to cut but less strong.
- Lashed joint: Wrap tightly with cordage in a square lashing pattern. Weakest long-term option but requires no cutting tools.
Check that the sill frame is level (place your water level on top) and square (measure diagonals — if both diagonals are equal, the rectangle is square).
Step 3 — Raise Corner Posts
Cut four posts 2.5-3 meters long. Notch the bottom of each post to sit over the sill beam. Raise each post vertically and brace it temporarily with angled sticks staked to the ground. Check each post with a plumb line (weight on string — the string should hang parallel to the post).
Step 4 — Install Top Plate and Cross Beams
Cut and fit a top plate (horizontal beam) connecting the tops of the corner posts along each wall. Use the same joinery as the sill frame. Add intermediate posts every 1.5-2 meters along the walls for strength.
Step 5 — Build the Roof Frame
A simple gable roof (inverted V) is the most practical:
- Cut two rafters for each rafter pair. Length depends on roof pitch — a 30-45 degree pitch is ideal (sheds rain and snow well).
- Join each pair at the peak with a lap joint or lashing.
- Lift rafter pairs onto the top plate, spacing them 60-90 cm apart.
- Run a ridge beam along the peak connecting all rafter pairs.
- Add horizontal purlins (smaller poles) across the rafters every 30-40 cm for roof covering attachment.
Roof pitch guide:
- 30 degrees: Good for rain, marginal for heavy snow
- 45 degrees: Excellent all-purpose. Snow slides off. Rain sheds instantly.
- 15 degrees or less: Only in dry climates. Snow will accumulate and collapse the roof.
Step 6 — Wall Infill
The timber frame is a skeleton. Fill the walls with one of:
- Wattle and daub: Weave flexible branches (wattle) between the posts, then plaster both sides with a mix of clay, straw, and sand (daub). Apply daub 3-5 cm thick per side. Let dry 1-2 weeks.
- Stacked logs: Notch smaller logs to fit between posts.
- Split plank siding: Split logs into planks and nail/peg them horizontally to the frame.
- Thatch panels: Bundles of reeds or grass tied between posts (warm climate only).
Step 7 — Roofing
- Thatch: Bundles of dried reeds, straw, or grass, 20-30 cm thick, laid from bottom to top with each row overlapping the one below by at least 2/3. A properly thatched roof lasts 15-30 years and is an excellent insulator. Minimum pitch: 45 degrees.
- Bark shingles: Large strips of birch, cedar, or elm bark layered like fish scales from bottom to top.
- Wooden shingles: Split thin slabs of wood (cedar, oak) and layer from bottom to top with 2/3 overlap.
- Sod: Lay turf (grass-side up) over a layer of birch bark or other waterproof membrane. Heavy — requires very strong roof framing. Excellent insulation.
Method 2: Adobe and Cob Construction
Adobe and cob use earth as the primary building material. These structures are fireproof, excellent thermal mass (stay cool in summer, warm in winter), and can last centuries. Best suited to dry and moderate climates. In very wet climates, adobe walls dissolve — use wide roof overhangs (60+ cm) and a stone foundation to compensate.
Adobe (Molded Bricks)
Step 1 — Test Your Soil
You need soil with 20-30% clay content. Too much clay and bricks crack as they dry. Too little and they crumble.
Test: Make a small brick (10 x 5 x 5 cm) from your soil mixed with water and a pinch of straw. Let it dry for 3 days in the sun. If it cracks badly, add more sand. If it crumbles, add more clay soil.
Step 2 — Mix Adobe
Mix by volume:
- 3 parts sandy soil or sand
- 1 part clay soil
- Enough water to make a thick, workable mud (like stiff cookie dough)
- Handful of chopped straw or dried grass per bucket of mix (prevents cracking)
Mix in a pit or on a tarp by stomping with bare feet — this is the traditional and most effective method.
Step 3 — Form Bricks
Build a wooden form (mold): a simple rectangular box with no top or bottom, 30 x 15 x 10 cm (standard adobe brick size). Pack the mix firmly into the mold, level the top, and lift the mold away. Each brick stays in place on a flat, sandy drying surface.
Production rate: 2 people can make 80-100 bricks per day. Drying time: 1-2 weeks in dry weather, turning once after 3-4 days. Bricks needed for a 3 x 4 meter building: approximately 800-1,200 depending on wall thickness.
Step 4 — Lay Bricks
Build on a stone foundation at least 15 cm above ground. Use the same adobe mix (slightly wetter) as mortar. Lay bricks in a staggered pattern (like modern bricklaying) so vertical joints never align. Wall thickness: minimum 30 cm (one brick length) for a single-story building. 45 cm for better insulation.
Build slowly — no more than 60 cm of wall height per day, or the weight of wet mortar will compress and bulge lower courses. Let each day’s work set overnight.
Step 5 — Openings
For doors and windows, span the opening with a wooden lintel (a beam that is at least 30 cm longer than the opening, so it rests solidly on the wall on both sides). Continue building the wall over the lintel.
Cob (Monolithic Earth)
Cob is similar to adobe but built in place, without bricks. You stack handfuls of the same mix directly onto the wall, building up 30-60 cm per day and letting each layer dry before adding the next.
Advantages over adobe: No mold needed, can build curved walls, easier to add sculptural features (shelves, benches built into walls). Disadvantages: Slower (one layer per day), harder to keep walls straight, requires more patience.
Technique: Roll the cob mix into loaf-sized pieces. Place them on the wall, pressing each firmly into the layer below. Trim the outside with a flat tool to keep walls vertical. Check with a plumb line frequently.
Method 3: Stone Construction
Stone buildings can last for millennia. They are fireproof, pest-proof, and virtually maintenance-free. However, they require the most skill and labor.
Selecting Stone
- Best: Flat-bedded sedimentary stone (limestone, sandstone, slate). Naturally splits into manageable, flat-faced blocks.
- Acceptable: Rounded river stones (harder to stack stably — needs more mortar).
- Avoid: Very large boulders (too heavy to handle) and soft, crumbly stone.
Dry Stone (No Mortar)
- Sort your stones into sizes: large base stones, medium wall stones, small fill stones.
- Build two parallel faces (inner and outer wall) with the flattest faces outward.
- Fill the space between faces with smaller stones tightly packed (called “hearting”).
- Every 60-90 cm of height, lay “through stones” — long stones that span the full wall width, tying inner and outer faces together.
- Wall thickness: minimum 45 cm for a load-bearing wall. 60 cm is more stable.
- Tilt each stone very slightly inward (toward the wall center). Never tilt outward — the wall will eventually push apart.
Mortared Stone
Use clay mortar (clay + sand + water, mixed to a peanut butter consistency) or lime mortar (see Lime and Cement) between stones. Mortar fills gaps and locks stones in place. Apply a 1-2 cm layer between each course.
Lime mortar is far stronger than clay mortar and water-resistant. If you can produce lime (by burning limestone), always use it.
Insulation
Thermal Mass vs. Insulation
- Thermal mass (stone, adobe, cob): Absorbs heat slowly, releases it slowly. Keeps interiors cool during hot days and warm during cool nights. Best in climates with large day/night temperature swings.
- Insulation (straw, wool, leaves, moss, air gaps): Resists heat transfer. Keeps warm air in during winter. Essential in cold climates.
The ideal wall has both: thermal mass on the inside and insulation on the outside.
Insulation Methods
- Double wall with fill: Build two thin walls 10-15 cm apart and fill the gap with dry straw, wool, dried leaves, or moss. Keep fill material dry or it loses all insulating value.
- Exterior thatch: A thick layer (10-20 cm) of reeds or straw on the outside of the wall.
- Interior lining: Hang animal hides, woven cloth, or bark panels 2-5 cm off the wall. The air gap is the insulator.
- Roof insulation: Critical — most heat escapes upward. Use 15-30 cm of straw, leaves, or moss between the roof covering and the interior ceiling.
Fireplace and Chimney
If you are heating with fire inside the structure (and you will be), you need a fireplace and chimney or you will fill the room with smoke.
Simple Fireplace
- Build the fireplace against one wall (ideally the wall facing the prevailing wind, so the wind creates a draft up the chimney).
- Use stone or adobe for the firebox — wood walls and fire do not mix.
- The firebox should be at least 60 cm wide, 50 cm deep, and 60 cm tall.
- Build a stone or adobe chimney above the firebox, narrowing from the firebox width to about 20-25 cm square at the top.
- The chimney must extend above the roof peak by at least 60 cm, or smoke will be pushed back down by wind.
- Include a flat stone shelf (“smoke shelf”) inside the chimney just above the firebox opening to prevent rain from falling directly onto the fire and to improve draft.
Smoke Hole (Simpler Alternative)
If you cannot build a chimney, leave a hole in the roof directly above the fire pit (centered in the room). Build the fire directly below. Disadvantages: rain enters the smoke hole, less efficient draft, more smoke in the room. A raised hood of bark or hide above the fire pit helps direct smoke upward.
Common Mistakes
| Mistake | Why It’s Dangerous | What to Do Instead |
|---|---|---|
| Building on low ground | Flooding destroys everything you built and your stored supplies | Build at least 2m above high water mark |
| No foundation or too-shallow foundation | Building shifts and cracks, walls lean, structure collapses | Dig below frost line, use rubble or stone piers |
| Wood touching ground | Rot and termites destroy the structure within 2-5 years | Always raise wood 15+ cm above ground on stone |
| Walls not plumb (vertical) | Load distribution fails, wall leans and eventually falls | Check every 30 cm of height with a plumb line |
| Roof pitch too shallow | Water pools, leaks develop, roof collapses under snow | Minimum 30 degrees; 45 degrees in wet/snowy climates |
| No roof overhang | Rain runs down walls, eroding adobe and rotting wood | Extend roof 30-60 cm past walls on all sides |
| Adobe bricks not fully dry | Weak bricks crack under load, wall fails | Wait full 1-2 weeks; bricks should feel light and ring when tapped |
| No ventilation | Condensation rots structure from inside; smoke accumulates | Provide at least two openings on opposite walls |
What’s Next
A permanent shelter is the foundation for more advanced construction:
- Structural Engineering — multi-story buildings, bridges, arches
- Woodworking — furniture, fine joinery, wooden tools
- Pottery & Ceramics — make roofing tiles, water pipes, and floor tiles
Quick Reference Card
Permanent Shelter — At a Glance
Site: High ground, good drainage, south-facing, near water, out of wind.
Foundation: Always. Rubble trench or stone piers. Below frost line.
Minimum size: 3 x 4 meters (12 m2) for 2-4 people.
Method Best Climate Build Time (2 people) Lifespan Skill Level Timber Frame Any 2-4 weeks 50-100+ years Intermediate Adobe Brick Dry/moderate 4-8 weeks 100+ years Beginner-Intermediate Cob Dry/moderate 6-12 weeks 100+ years Intermediate Stone Any 8-16 weeks 500+ years Advanced Critical rules:
- Wood never touches ground (15 cm min clearance)
- Roof pitch 30-45 degrees minimum
- Roof overhang 30-60 cm past walls
- Check plumb (vertical) every 30 cm of wall height
- Insulate the roof — most heat escapes upward
- Plan for fire: stone/adobe firebox, chimney above roof peak