Timbers and Sustainability
Knowledge Organiser
Plywood
Deforestation
Man-made boards
Man-made boards such as MDF and Plywood are often much cheaper than solid timber.
Plywood is made up of thin veneers (sheets) of timber glued together – meaning almost all of the trunk is used.
MDF is often made from scrap material, such as the excess when solid planks of timber are made. The waste is made into a fibrous pulp and mixed with an adhesive before being cast to the desired size and thickness.
Solid timber is considered more valuable and desirable than man-made boards.
Some solid woods need additional protection from weathering, but some, such as teak, contain naturally weather resistant oils making them a good choice for outdoor furniture.
The grain and various colour options make solid timber much more aesthetically pleasing.
At risk of warping, splitting or twisting as it dries.
Hardwood
Deciduous
Broad Leaves that tend to be lost in winter to preserve energy when light is limited.
Grow slowly, often up to 100 years for maturity.
Dense, tight grain – harder wearing and more resistant to rot.
Hardwood timber is often much more expensive due to growth time.
Variety of colours and sought-after aesthetical qualities.
Examples:
Oak Mahogany Beech
Softwood
Coniferous/Evergreen
Needles opposed to leaves which they keep year round.
Grow fairly quickly, reaching maturity within 25 years.
Grain is more porous, which can absorb water more easily and rot if untreated.
Often considered more sustainable and cost effective due to quick growth.
Not available in as many colours – but easily stained tor ensemble hardwoods.
Examples:
Pine Cedar Spruce
Sustainably managed forests
What material would you make the following products from and why?
Childs toy Boat hull Wardrobe
What do you think is the most sustainable and environmentally friendly: hardwood, softwood, MDF or plywood – explain.
Why is deforestation so bad? We have plenty of forests across the world.
Can bamboo really replace plastic?
Extend your learning:
MDF