Material Planning for Bamboo Villa Construction

Material Planning for Bamboo Villa Construction in Sembalun, East Lombok

Bamboo villas are becoming common in Sembalun due to the region’s cooler climate and availability of natural materials. Even so, bamboo structures still rely on engineered components, proper connections, and supporting materials to meet safety, durability, and compliance requirements in Indonesia. The following overview outlines practical considerations and indicative 2025 material pricing for planning such projects.

1) Structural Bamboo and Supporting Timber Elements

Bamboo forms the primary frame in many eco‑villa designs, but structural reliability depends on grading, treatment, and proper joinery.

Typical supporting materials used alongside bamboo include:

• Dolken Wood / Scaffolding (Ø 8–10 cm) — Rp 39,706 per bar
• Timber 5/10 Class II — Rp 120,000 per bar
• Timber 6/12 Class II — Rp 172,000 per bar

In practice:

• Bamboo must be chemically treated to resist insects and moisture.
• Timber is often used at high‑stress points, joints, or where load transfer requires denser materials.
• All natural materials should be stored off the ground and kept dry.

2) Foundation and Base Structure

Even bamboo villas require stable foundations. In Sembalun, sondir testing often shows mixed soil conditions, and foundations must be planned accordingly.

Common foundation materials include:

• Ready Mix Concrete — Rp 1,232,435 per m³
• Reinforcing Steel Ulir — Rp 17,255 per kg
• Besi Beton Ø12 mm — Rp 166,914 per pcs
• Batu Belah Pondasi (Split Stone) — Rp 259,460 per m³

Execution points:

• A concrete base ring or pad footing is typical beneath bamboo posts.
• Connections between bamboo and foundation must avoid direct soil contact to prevent rot.
• Anchor plates or steel saddles may be required depending on structural design.

3) Roofing for Bamboo Villas

Bamboo roofs typically pair natural aesthetics with lightweight profiles. Several options are used depending on design and budget.

Material examples:

• Spandek Plain 0.35 × 1 m — Rp 58,665 per meter
• Multiroof Pasir Finish — Rp 48,001 per m²
• Bubungan “Ujung” — Rp 57,361 per pcs
• Bubungan Spandek 3 m — Rp 90,000 per sheet

In practice:

• Metal roofing provides durability in Sembalun’s high rainfall.
• Ridge profiles must match the sheet pattern to prevent leaks.
• Bamboo rafters require correct spacing to minimize deflection.

4) Walling, Flooring, and Interior Finishes

Many bamboo villas integrate natural finishes but still rely on stable base layers and selected components to meet functional requirements.

Examples of materials often combined with bamboo:

• Calsiboard 6 mm — Rp 181,622 per sheet
• Triplek 120 × 240 × 12 mm — Rp 215,103 per sheet
• Keramik 20 × 20 (Bathroom floor) — Rp 77,838 per m²
• Granit 40/40 — Rp 190,000 per m²

Practical considerations:

• Calsiboard is preferred where humidity is high (bathrooms, kitchens).
• Plywood is used for ceiling panels or interior partition frames.
• Wet-area tiling must include waterproofing beneath.

5) Plumbing and Sanitation for Off‑Grid or Hybrid Systems

Bamboo villas still require compliant water supply and wastewater systems.

Supporting materials include:

• PVC AW Ø3" — Rp 234,000 per meter
• PVC AW Ø2" — Rp 115,000 per meter
• Floor Drain ex. YUTA — Rp 23,267 per pcs
• Tee PVC 3" × 2" — Rp 244,050 per pcs
• Buis Beton Ø80 cm — Rp 100,509 per pcs

Execution:

• Use pressure‑rated pipes for clean water, and RRJ systems for underground drainage.
• Elevate pipes beneath bamboo flooring to allow access for maintenance.

6) Electrical Fit‑Out and Safety Components

Electrical installation must meet Indonesian safety standards and be properly concealed to protect bamboo from heat exposure.

Representative materials:

• Fitting Lampu No.210 — Rp 19,556 per pcs
• Fitting Lampu Otomatis (Sensor Cahaya) — Rp 72,353 per pcs

Door Closer ex. DEKKSON — Rp 212,436 per pcs (for hybrid timber doors)*

• Conduit 5/8" — Rp 35,000 per bar

In practice:

• Wiring is usually run through concealed conduits or dedicated surface channels to avoid damaging bamboo.
• Use heat‑resistant fittings where fixtures sit near natural materials.

7) Exterior Works and Landscaping Integration

Site development around bamboo villas typically uses lightweight materials that complement the natural design.

Examples:

• Paving Block K100 (6 cm) — Rp 93,863 per m²
• Batu Koral 1–2 cm — Rp 355,072 per m³
• Selected Fill Soil — Rp 227,028 per m³

Execution notes:

• Proper subgrade preparation prevents settlement under walkways.
• Good drainage is essential to protect bamboo structures from moisture buildup.

Documentation, Testing, and Compliance Requirements

• Soil Tests (Sondir 3 Points + Report) are typically required even for bamboo villas, especially in sloped or soft‑soil areas.
• Reports must be included in OSS and PBG submissions, showing bearing capacity data and recommended foundation depth.
• Inspectors will check that bamboo-to-concrete interfaces match approved details and that safety systems (electrical, plumbing) comply with SNI standards.

Pricing Disclaimer (2025)

All prices listed are indicative as of 2025 and based on internal procurement references. Actual costs in Lombok vary by location, supplier stock, and logistics. In remote or elevated regions such as Sembalun, prices may be higher due to access conditions and transport limitations. Revalidate all prices and specifications before tendering or procurement.

Summary

Bamboo villa construction in Sembalun combines natural materials with engineered components to meet modern safety and compliance standards. Foundation design, roofing selection, plumbing, electrical systems, and site works all require proper planning and documentation. The indicative prices above provide a practical baseline for early budgeting while maintaining alignment with regulatory requirements for villas, resorts, and eco‑tourism developments in Lombok.