building material: veneers
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7/27/2019 Building Material: VENEERS
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• Veneer refers to thin slice of wood cut from a
log with a slicing, peeling, or sawing machine.
• It is used on plywood, fine furniture, and
laminated shapes for decorative and architectural
purposes.
•Veneering is an ancient art, dating back to
the ancient Egyptians who used veneers ontheir furniture and sarcophagi.
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•Veneer is obtained either by "peeling" the trunk of a tree or
by slicing large rectangular blocks of wood known as fitches.
•The appearance of the grain and figure in wood comes from
slicing through the growth rings of a tree and depends upon
the angle at which the wood is sliced.
•Each slicing processes gives a very distinctive type of grain,
depending upon the tree species
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Stability - The unorganized grain in burl wood is beautiful but horribly prone to
warping and splitting. By slicing a burl into veneer, wood movement is kept under
control by the adhesive and substrate. Even the most unruly woods can be sliced into
veneer and used to make a stunning, yet stable panel.
Economy & Availability - Many wood species are so rare and valuable that in lumber
form, are simply unaffordable. There's a marked scarcity of fine logs available world-
wide. By slicing a log into veneer, the square foot of "face" material is increased by
over 4,000% and a new economy is created for these forest products.
Practicality - used for curved work but it's certainly not limited to fancy projects.
They're often considered indispensable for many woodworking projects.Layup Options - can create some of the most beautiful kaleidoscope designs with a
keen eye and a few sheets of sequenced veneers
Recyclability and renewability: Wood has the least impact on total energy use,
greenhouse gasses, air and water pollution, solid waste and ecological resource use.
Seventy percent less energy is required in the use of wood compared with any otherbuilding materials.
Sustainability: Using veneer extends the use of a piece of timber. The wood that
might be used in one solid piece a few visible cm wide can cover a far greater area
when used as a veneer.
Toxicity: Nontoxic; veneer stores carbon and also maximises the use of harvested
wood.
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1. Raw veneer has no backing on it and can be used
with either side facing up. It is important to notethat the two sides will appear different when a
finish has been applied, due to the cell structure of
the wood.
2. Paper backed veneer is as the name suggests,
veneers that are backed with paper. The
advantage to this is it is available in large sizes, or
sheets, as smaller pieces are joined togetherprior to adding the backing. This is helpful for
users that do not wish to join smaller pieces of
raw veneers together. This is also helpful when
veneering curves and columns as the veneer is
less likely to crack.
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3. Phenolic backed veneer is less common and is
used for composite, or manmade wood veneers.
Due to concern for the natural resource, this is
becoming more popular. It too has theadvantage of being available in sheets, and is
also less likely to crack when being used on
curves.
4. Laid up veneer is raw veneer that has
been joined together to make larger
pieces. The process is time-consuming
and requires great care, but is not difficultand requires no expensive tools or
machinery. Veneers can be ordered
through some companies already laid up
to any size, shape or design.
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5. Reconstituted veneer is made from fast-
growing tropical species. Raw veneer is cut
from a log, and dyed if necessary. Once dyed,
the sheets are laminated together to form ablock. The block is then sliced so that the
edges of the laminated veneer become the
“grain” of the reconstituted veneer.
.
6. Wood on Wood Also called 2-ply is a
decorative wood veneer face with a utility
grade wood backer applied at an opposing
direction to the face veneer
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Production Advantages
The production methods are environment friendly, as thickness and wastage are controlled
to maximize production.
Application Advantages
The finished boards are almost always aesthetically pleasing. Acoustic wooden veneer-
based boards provide suitable noise control applications. Give the illusion of solid
timber but with a cost benefit, as well as freedom in design.
Processing and Storage Disadvantages
Veneer boards are characterized by two surfaces: the front, or face, and the back. The face is
constructed from more finely-grained wood species, while the back is of less quality material,
which may deteriorate easily. Finishing applications include lacquer, varnish, wax polish and
oil, which also undergo wearing due to constant use. Because a veneer board is composed of
several layers, in some instances, it might peel off when stored improperly.
Business Disadvantages
A veneer board business requires solid financial investing for equipment and technology, so
that supply is commensurate with demand flow. Unless an investor has a steady market for
finished products, going into the veneer board business may prove risky. Availability of skilled
workers may also prove to be a challenge, as the technique in producing the material requires
a high level of technical knowledge and expertise.
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The end use for veneer are manly used fordecorative purposes and the construction
of plywood.
Veneer is used by
•Manufactures,
•Cabinet Makers,•Construction
•Joinery Industry
•Interior Designers
•Architects.
The veneer lay ons are placed on other
wood constituted products such
as Medium Density Fiberboard,
Particleboard to produce.
•Cabinet interiors and exteriors
•Desk and Table tops
•Kitchen tops•Doors
•Draws
•Furniture
•Shelves
•
Wall Paneling•Countertops
Veneers are also used in
business and commercial
institutions, hospitals, gym
walls, lecture halls, workshops,
sports and reception places and
work factories.
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