When you are checking the specification table of one prefab tiny house model like Jeezoo F20 Pro, have you ever wondered why bamboo plywood serves as the floor base while cement fiber board is exclusively used for bathroom zones? This guide is to unveil the myth.
What Is Bamboo Plywood?
To understand the difference between the two base materials, it is essential to first clarify the properties of each substrate.
Bamboo plywood is engineered from natural bamboo strips. Through strict drying, gluing, and high-temperature hot-pressing processes, bamboo is formed into a dense, multi-layer, solid structural board. Â Due to outstanding durability and resilience, it has become a popular construction material for prefab housing, widely used for floor bases, ceiling panels, wall panels, and cabinet structural components.
Key Features of Bamboo Plywood
High Strength and Load-Bearing Capacity
Due to the multi-layer structure, bamboo plywood delivers exceptional structural strength, reliable load-bearing performance, and superior bending resistance. This traits make it the ideal base material for prefab house floor base, modular home flooring, and furniture structures.
Lightweight Compared with Cement-Based Boards
Besides superior strength, bamboo plywood also boasts a distinct lightweight advantage over cement-based boards. Weight is a critical factor for expandable tiny houses, which often undergo long-distance ocean shipping, cross-region transportation, and on-site relocation. A lightweight unit can greatly reduce shipping cost improves transport efficiency. When it comes to expandable container houses, the use of bamboo plywood lead to fast installation.
Better Screw Holding Performance
A screw-holding and crack-resistant base substrate lays is critical for flooring installation and furniture fixation. Flooring materials are screwed and fastened onto the base substrate, while anti-tip kits for cabinets and indoor furniture are also anchored to the same base layer.
Bamboo plywood perfectly meets this requirement. Its reliable screw-holding performance effectively prevents loosening, cracking.
What Is Fiber–Cement Board?
Fiber cement board is a laminated construction board materials, consist of cement, cellulose fibers, and additives. Their most remarkable features are waterproof, A1-grade fire-resistance performance and stability. For this reason, they are often used in high-humidity zones such as bathroom and kitchen in expandable tiny homes.
Key Features of Cement Fiber Board
Excellent Moisture Resistance
Fueled by its inorganic cement-silica matrix and dense autoclaved microstructure, fiber-cement board achieves outstanding moisture resistance.
Unlike wood-based panels, It will not swell, warp or delaminate under humid conditions. It also resists mould and rot. All these advantages make it perfect for bathroom substrates, kitchen backsplashes, and exterior wall cladding.
A1-Grade Fire Resistance
Again, thanks to the inorganic raw materials-cement, silica sand, lime, plus a small fraction of cellulose reinforcing fibers, fiber-cement boards does not burn and will not feed fire.
They are certified with A1 fire-rating, the highest fire safety rating for building materials. For this non-combustible feature, they are suitable for wet areas, fire-rated walls, and exterior building applications.
Long-Term Durability
Being non-combustible, resistant to mould and rot, and does not absorb large amounts of water like wood, fiber cement board delivers far better dimensional stability than wood based panels under humid condition. It maintains stable dimensions year-round without deformation, ensuring long-term structural durability.
Bamboo Plywood vs Cement Fiber Board: Key Differences
Each material has irreplaceable strengths. The table below summarizes their core differences and targeted applications for expandable tiny houses:
| Feature | Bamboo Plywood | Cement Fiber Board |
| Material | Bamboo layers | Cement + fiber |
| Main Advantage | Strength and flexibility | Moisture and fire resistance |
| Weight | Lightweight | Heavier |
| Water Resistance | Moderate | Excellent |
| Fire Resistance | Limited | Non combustible (A1 fire-rating) |
| Best Application | Floor base | Bathroom/wet areas |
| Installation | Easy to cut and fix | Requires special tools |
Materials
Bamboo Plywood is mainly built from Bamboo layers.
Fiber-cement board is primarily built from inorganic raw materials: cement, silica sand, lime, plus a small fraction of cellulose reinforcing fibers.
Features
Bamboo plywood is lightweight while the other one is heavier.
Fiber-cement boards excel in water and fire resistance than bamboo plywood.
Applications
Boasting excellent water and fire resistance, fiber-cement boards are often applied for bathroom and other wet areas, while bamboo plywood board are mainly used in dry areas.
Installation
The lightweight plywood is easy to cut and fix, while fiber-cement boards require special tools.
Why Do Expandable Tiny Houses Use Both Materials?
There is no one-size-fits-all material for expandable tiny homes. It depends on the material features and where it is used.
Bathroom & Wet Zones: Fiber Cement Board
Bathrooms are the most humid and water-prone areas in tiny houses. We adopt 18mm fiber-cement board as the base substrate for all wet zones, topped with waterproof tiles. Its outstanding moisture resistance, mold resistance, and fire safety ensure long-term stable performance in harsh humid environments.
Living Room & Bedroom Floor Areas: Bamboo Plywood
For dry areas including living rooms and bedrooms, we adopt 18mm bamboo plywood for standard floor base. The materials are durable enough to supports daily loads. On top of the bamboose plywood base substrate, we need to pave SPC flooring and the bamboo plywood enable better screw holding.
More importantly, bamboo plywood’s lightweight property is critical for prefab tiny houses. Living areas are foldable and expandable structural parts that require manual lifting and folding. For reference, a 20ft expandable tiny house with bamboo plywood floors only needs 4 workers for on-site expansion. If replaced with heavy cement fiber board, the same installation requires up to 10 workers, drastically lowering efficiency and increasing labor costs.
Which One Is Better for Prefab Houses?
There is no definitive answer. Materials should be matched to different parts of the building.
- For superior shipping and installation efficiency: bamboo plywood is preferred.
- Where moisture or fire resistance matters most: fiber-cement board takes priority.
Well-designed high-end expandable tiny houses never rely on a single material. Instead, they combine the strengths of bamboo plywood and fiber-cement board across different functional zones to balance structural performance, safety, cost, and construction efficiency.
FAQ
Is bamboo plywood waterproof?
Bamboo plywood has good moisture resistance but is not designed for continuous water exposure. Waterproof treatment and proper installation are required.
Can cement fiber board be used for flooring?
Technically yes, but it is not ideal for main living floors. Cement fiber board is heavy, difficult to cut and install, and delivers poor foot feel and comfort. Therefore, it is rarely used for formal flooring and is mostly reserved for bathroom and kitchen wet zones.
Why not use cement fiber board throughout the whole prefab house?
Full-house cement fiber board application brings obvious drawbacks: it greatly increases the overall unit weight, raises long-distance shipping costs, and complicates on-site cutting and installation. Zoned material matching maximizes overall house performance while optimizing transportation and labor costs.
