Timber product

• Fibre building boards 

1. Produced by pulverising of wood down to individual fibres and then compressing them to form large sheets .
    
2. Small % of adhesive may be used as binder 
3. Various types of product obtained based on degree of compression of fibres . 
4. Eg Hardboard (highest density ) , medium density fibre board (MDF) and Softboard (lower density ) . 
5. Strength increases with density . 

•  Particle boards (chipboard )

-Consist of small particles or splinters of wood bonded together with synthetic resins under high pressure , excellence for flooring .

• Advantages 

-Very rapid construction
-Dimensional stability
-A smooth splinter free surface

• Disadvantage 

-Risk of irreversible damage if non-moisture resistant boards are used
-Difficult to nail and can be quite bristle edges
-Access to the undefloor space can be difficult due to T&G edges for fire resistant .
-Health hazard if excess formaldehyde is been used during manufacture .

• Water and orient strand board (OSB) 
• Similar to chipboard but using larger flakes of wood , less adhesive required , improved strength and stiffness . 
• Strength performance between plywood and chipboard 
• Glued Laminated timber (Glulam ) 
• Large structural members produced by joining small strips of wood together with glue to size  , shape and quality .