# Sovereignty Module: Lay the Thatch

## Complete Thatching and Roof Construction: From Reed to Rainproof

Thatching is one of the oldest roofing methods, using natural materials to create waterproof, insulating roofs. This campaign covers materials, techniques, ridge construction, and maintenance.

### Chapter 1: Thatching Materials

| Material | Durability | Insulation | Availability | Difficulty | Lifespan |
|---|---|---|---|---|---|
| Water reed (Phragmites) | Excellent | Very good | Wetlands | Moderate | 25-60 years |
| Long straw (wheat/rye) | Good | Very good | Farmland | Moderate | 15-25 years |
| Combed wheat reed | Very good | Very good | Farmland | Moderate | 25-40 years |
| Palm fronds | Good | Moderate | Tropical | Low | 5-15 years |
| Grass (various) | Moderate | Good | Widespread | Low | 5-10 years |
| Heather | Good | Good | Moorland | Moderate | 15-25 years |
| Sedge | Good | Good | Wetlands | Moderate | 20-30 years |

Material preparation: 1) Harvest at maturity (after seed set, before decay). 2) Water reed: cut in winter when dry. 3) Long straw: save from grain harvest (do not use combine-harvested straw). 4) Bundle into manageable sheaves (arm-sized bundles). 5) Store dry until needed (wet thatch rots). 6) Sort by length (longer material for main roof, shorter for ridges). 7) Remove leaves and debris (clean material lasts longer). 8) Soak briefly before use (flexible, easier to work).

### Chapter 2: Roof Structure

| Component | Function | Material | Sizing |
|---|---|---|---|
| Rafters | Main roof support | Timber (4-6 inch diameter) | Every 18-24 inches |
| Purlins | Horizontal supports across rafters | Timber (2-3 inch diameter) | Every 12-18 inches |
| Battens (laths) | Thatch attachment points | Split wood or sawn lath | Every 8-12 inches |
| Ridge pole | Top of roof | Timber (4-6 inch diameter) | Full length of roof |
| Wall plate | Top of wall, supports rafters | Timber (4-6 inch diameter) | Full length of wall |

Roof pitch requirements: 1) Minimum pitch for thatch: 45 degrees (steeper is better). 2) Ideal pitch: 50-55 degrees. 3) Steep pitch sheds water quickly (water runs off before soaking in). 4) Shallow pitch allows water to penetrate (thatch fails). 5) Eaves should overhang walls by 12-18 inches (protects walls from rain). 6) Thatch thickness: 12-15 inches minimum (provides waterproofing and insulation).

### Chapter 3: Thatching Technique

Basic thatching (long straw method): 1) Start at eaves (bottom of roof). 2) Lay first course of bundles with butt ends (thick ends) at eaves. 3) Butt ends should extend 6-8 inches beyond the wall. 4) Secure with hazel spars (bent staples of hazel wood) or wire. 5) Each spar is pushed through thatch into batten below. 6) Lay next course overlapping previous by 6-8 inches. 7) Work upward toward ridge. 8) Each course overlaps the one below (like shingles). 9) Dress (trim) each course with a leggett (flat paddle tool). 10) Compress thatch firmly (tight thatch sheds water better). 11) Continue to ridge. 12) Ridge requires special treatment (see Chapter 4).

| Fixing Method | Material | Strength | Difficulty | Tradition |
|---|---|---|---|---|
| Hazel spars | Bent hazel rods | Good | Moderate | English traditional |
| Scallops and spars | Hazel rods and horizontal rods | Very good | Moderate | English traditional |
| Wire ties | Galvanized wire | Very good | Low | Modern |
| Bamboo pins | Bamboo stakes | Good | Low | Tropical |
| Rope lashing | Natural or synthetic rope | Good | Low | Various traditions |

### Chapter 4: Ridge Construction

| Ridge Type | Durability | Appearance | Difficulty | Tradition |
|---|---|---|---|---|
| Wrap-over ridge | Good | Simple, rounded | Low | Basic |
| Block ridge | Very good | Decorative, patterned | Moderate | English |
| Flush ridge | Good | Clean, minimal | Moderate | Modern |
| Sedge ridge | Very good | Traditional, thick | Moderate | English (Norfolk) |
| Turf ridge | Moderate | Grass-covered | Low | Scandinavian |

### Chapter 5: Maintenance and Repair

| Task | Frequency | Purpose | Method |
|---|---|---|---|
| Inspect | Annually (spring) | Identify damage, thin spots | Visual inspection from ground and ladder |
| Re-ridge | Every 10-15 years | Ridge wears fastest | Remove old ridge, apply new |
| Patch thin spots | As needed | Prevent leaks | Add new thatch over thin areas |
| Remove moss/algae | Every 2-3 years | Prevents moisture retention | Wire brush or copper strip at ridge |
| Trim eaves | As needed | Maintain neat appearance | Shears or knife |
| Fire prevention | Ongoing | Thatch is combustible | Spark arrestor on chimney, fire retardant treatment |

### Reference Card

1. Steep pitch is essential (thatch must be at minimum 45 degrees; steeper roofs shed water faster and last much longer). 2. Start at the bottom (always begin thatching at the eaves and work upward; each course overlaps the one below like shingles). 3. Tight thatch is waterproof thatch (compress each course firmly; loose thatch absorbs water instead of shedding it). 4. The ridge wears first (the ridge is exposed to the most weather; expect to re-ridge every 10-15 years even if the main roof is sound). 5. Water reed lasts longest (properly applied water reed thatch can last 60 years; it is the premium thatching material). 6. Thatch insulates brilliantly (a 12-inch thatch roof provides insulation equivalent to modern standards; warm in winter, cool in summer). 7. Fire is the main risk (thatch is combustible; install spark arrestors on chimneys and maintain clearance from heat sources). 8. Harvest at the right time (cut thatching material after it has dried naturally in the field; green material rots quickly on the roof).