Types of Wood |
|
BlockBoard |
| The inner core
consists of strips of softwood glued together.
The annual rings of the strips are at right angles
to each other. Blockbaord should not be nailed
close to the end or used outdoors. |
|
ChipBoard |
Small chips of
softwood are bound together with a resin adhesive
and the sheet is squeezed between rollers to the
required thickness ( usually 1/2 - 1 " )
It is cheaper than plywood and blockboard and
therefore is usually used to make furniture and
work tops. |
|
HardBoard |
Pulped wood is
mixed with adhesives and rolled into sheets of
various sizes. It isn't very strong because of
the cheaper materials used in it's manufacture
but is widely used around the home. It can be
impregnated with oil to make it water resistant.
|
|
MDF ( Medium
Density FibreBoard) |
The base material
for fibreboard is made from fibres produced when
timber is subjected to a vacuum in a pressure
chamber. These fibres are bonded with resin and
then rolled - the pressure used has an effect
on the quality of the board. It has the advantage
of being cheap and it can be cut cleanly - and
it has a surface which can be stained, polished
or painted. |
|
Plywood |
Thin layers ('plys')
of wood are glued together to form a board which
has neither the warping or splitting tendency
of natural wood. this property is due to each
layer being layed at right angles to its partner
and an odd number of layers being used to make
up the finished board. It is good to be used outdoors
because it is strong. |
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