Manufactured boards are made from waste wood rather than pure wood. They include plywood, medium density fibreboard, blockboard, and chipboard. Plywood is made by gluing an odd number of thin wood veneers together under pressure. Blockboard has strips of softwood glued between layers of veneers, like a sandwich. Chipboard is made by mixing wood chips with resin and pressing the mixture under heat and pressure. Medium density fibreboard is produced similarly but with wood fibres instead of chips. Manufactured boards are cheaper alternatives to pure wood but also have disadvantages like being weaker or more prone to damage.

1. Lesson Manufactured Boards
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2.  In creole sometimes we use the term wood to describe
pure wood and manufactured boards.
 Manufactured boards are man made materials.
 Instead of throwing away waste wood, they are used to
create a new category of materials which are called
manufactured boards.
 Examples of manufactured boards: Plywood, Medium
density fibreboard, Blockboard, Chipboard.

3. Plywood
Construction method.
Plywood is made from wood veneers glued together.
An odd number of veneers are used.
Glue applied between an odd number of veneers. Then pressure
applied to the veneers. The glue is allowed to set.

4. Construction method.
(A veneer is a thin sheet of material. It can be made from wood or plastic)

5. Examples of plywood.

6. Advantages of plywood.
• Plywood is a strong material
• It is available in different thickness
• It is a cheap compared to pure wood
Disadvantages of plywood.
• Plywood splint with time.
• It is not resistant to water unless protected.
• The edges must be hidden

7. Blockboard
Construction method.
 Strips of softwood are glued between two layers of veneers.
The material looks like a “sandwich”

8. Construction method

9.  Blockboard

10.  Advantages of blockboard.
 Blockboard is cheaper than pure wood
 It has a good strength.
 It is light
 Disadvantages of blockboard.
 It is not hard
 Prone to insect attack
 Can be difficult to work

11. Chipboard Also (called particleboard)
Construction method.
Chipboard is made from wood chips. The wood chips are
mixed with resin (glue) the mixture is pressed under heat a
pressure.

12. Construction method.

13. Examples of chipboard.

16.  Advantages of chipboard.
 It does not have defects
 Can be used for sound insulation.
 It is cheaper than wood
 Disadvantages of chipboard.
 It is not a strong material.
 Difficult to make wood joints
 When discarded can be harmful to the environment

17. Medium density fibreboard
M.D.F is made by mixing wood fibres with resin. The mixture is pressed under heat and pressure to
form a sheet

20.  Advantages of MDF.
 It is cheaper than pure wood.
 It has a smooth surface
 Available in large sheets
 Disadvantages of chipboard.
 It is easily damaged by water.
 Generates dust when working.
 Not strong material

21.  Important for exams. Complete table below. Keep the table.