CEWOOD Wood Wool Board Insulation

What are the main properties of wood wool boards?

Wood wool boards have an open, porous structure created by the spaces between the cement-bonded wood shavings. This structure allows water vapor to pass through the board and also contributes to its sound-absorbing properties. The cement binder adds stability and creates a surface that works well with compatible plaster finishes. Wood wool boards offer:

• good sound absorption;
• resistance to moisture;
• fire resistance;
• good adhesion to plaster.

These properties allow fibrolite boards to be used in both renovation and new construction, including timber-frame walls, exterior wall systems and ceilings.

Where can wood wool boards be used?

Wood wool boards work well in applications where their moisture permeability, surface stability and compatibility with finishing systems are useful. However, they are not structural boards and should not be used where high load-bearing or bending strength is required.

Unfinished boards also need protection from prolonged exposure to outdoor conditions. For exterior applications, wood wool boards should be used with a compatible finishing system that protects the surface while allowing the board to perform as intended.

The specific board and installation method should always match its intended use.

What materials can be used with fibrolite boards?

Fibrolite boards are commonly installed as one layer within a wall, ceiling or other building structure. Depending on the application, they can be combined with:

• thermal insulation such as loose-fill cellulose insulation (ecowool) or mineral wool;
• wind barrier and vapor control membranes;
• timber or metal framing.

The materials need to work together so moisture can be managed correctly while each layer performs its intended function.

How do you choose the right wood wool board?

Wood wool boards are available in different thicknesses, densities and dimensions. These characteristics affect where a board can be used and can also influence installation and material requirements.

Higher-density boards generally provide greater mechanical strength and a harder surface, although the additional density also increases their weight. Thinner boards are commonly used for acoustic and decorative applications. Thicker fibrolite boards can provide a more substantial base for plaster systems or applications requiring greater mechanical stability.

The manufacturer’s specifications should be checked when selecting a board for a particular application.

How do you choose a finishing system for wood wool boards?

Exterior wood wool boards need a finishing system that protects them from prolonged exposure to weather without compromising the performance of the underlying material.

Depending on the product and application, this may include a reinforcing layer followed by mineral plaster or another finish approved by the board manufacturer. The materials used in each layer need to be compatible because poor adhesion can cause the finish to crack or separate from the board over time.

Following the board manufacturer’s specified finishing system helps maintain a durable bond between the fibrolite board and the finished surface.

How can moisture accumulation be prevented?

Wood wool boards allow water vapor to pass through them, but this property alone cannot prevent moisture from accumulating within a wall or roof. Moisture control depends on how the insulation, wind barrier and vapor control layers work together.

Incorrect installation or incompatible materials can allow moisture to remain trapped within the structure. Prolonged exposure can eventually weaken the bond between the fibrolite board and its finishing system, increasing the risk of cracking or separation.

If moisture damage occurs, the source of the moisture should be identified and corrected before the finish is repaired. Repairing the surface without addressing the underlying moisture problem can allow the damage to return.

How should joints be treated?

Board joints need to be prepared correctly before the finishing layers are applied. Movement or poorly treated joints can transfer stress into the finish and contribute to cracking over time.

Depending on the board and finishing system, joints may require reinforcing materials, construction tape, linen tape or another joint treatment specified by the manufacturer.

How should wood fiber boards be transpored and stored?

Wood wool boards should be protected from mechanical damage and prolonged exposure to moisture during transportation and storage. Proper handling also helps prevent boards from becoming warped or damaged before installation. It is recommended to:

• store the boards flat on a level surface to prevent deformation;
• protect them from precipitation and direct sunlight.

Before installation, inspect the boards for damage and confirm that their moisture content meets the manufacturer’s requirements.