Building a Traditional CHamoru Model House (Guma' CHamoru)

A traditional CHamoru house (guma' CHamoru) reflects the ingenuity of the Mariana Islands' indigenous people—designed for tropical climate, typhoon resilience, and communal living. Building a model honors this heritage. Here's a guide using authentic materials and methods.

Traditional Materials

• Posts & Beams (haligi): Ifil (Intsia bijuga, ironwood) or nunu (banyan, Ficus spp.)—dense, termite-resistant hardwoods. Modern substitute: ipe, teak, or pressure-treated lumber.
• Thatch Roof (atgut): Nipa palm (Nypa fruticans) or sugar cane leaves. Layers tied to purlins. Modern: palm thatch panels, synthetic thatch.
• Walls & Flooring: Woven bamboo (bambu) or betel palm slats (pugua). Allows airflow.
• Foundation: Coral limestone (acho) pillars or footings—elevates floor for flood protection and ventilation.
• Cordage: Coconut fiber (kokos) sennit (kaleb) for lashing joints. Modern: natural jute, hemp twine.
• Ornament: Roof finial (sala' or ta'taota')—carved wood or woven figure for spiritual protection.

Construction Process (Scaled for Model)

1. Site & Foundation

Select elevated base. Glue/cement coral limestone blocks (or painted foam) as footings. Space for haligi positions (typically 10–12 ft apart).

2. Frame (guma' haligi)

Erect vertical posts (haligi) into footings. Lashed with sennit (or pinned). Add horizontal beams (katsa) and roof purlins. Ensure square; diagonals for rigidity.

3. Roof Structure

Assemble rafters (tetas) in A-frame or hip roof. Traditional pitch: 45°+ for rain shedding. Thatch: layer from eaves upward, overlapping. Secure each layer with cordage.

4. Walls (paredes)

Weave bamboo slats into panels. Attach to frame with cordage—removable for airflow. Leave openings for windows/doors.

5. Floor (suelo)

Lay bamboo or hardwood slats on joists. Gap slightly for drainage/air. Traditional floors were open underneath (stilted).

6. Doors & Windows

Sliding bamboo panels (bentana) or shuttered openings. No glass traditionally.

7. Interior

Open plan. Add low benches (banka), sleeping mats (guafak), cooking area (kusiña) with clay stove (hornu).

8. Roof Ornament (sala' / ta'taota')

Place carved figure at roof peak—ancestral spirit guardian.

Cultural Notes

• Orientation: Door often faces east (sunrise) or ocean.
• Communal: Extended family lived together; cooking/socializing outdoors.
• Typhoon resilience: Aerodynamic roof, flexible lashings, elevated floor.
• Modern CHamoru architecture blends tradition with concrete, tin, and AC—but the guma' haligi form remains iconic.

Building this model is an act of cultural preservation. Consult Guam Preservation Trust or CHamoru cultural practitioners for authentic details.