|
March
2004
Australian Ironwood Antique Timbers Pty Ltd
88-90 Lilyfield Road, Rozelle NSW
TEL: 02 9818 1166
The Barn, Rozelle - magnificent timber
It's scandalous! In Australia our timber millers have
had their logging allocations substantially reduced by all the
various state governments. These logging allocations have ostensibly
been reduced to protect the environment and to promote eco-sustainable
forestry practices. Unfortunately this has had the effect of increasing
the price of Australian hardwood timbers which, consistent with
the laws of supply and demand, also encourages the importation
of non-environmentally friendly timbers that sell at a substantial
discount to our Aussie hardwoods.
I could possibly accept the logging allocations if the statutory
forestry limitations were realistic. The problem I have is that
the regional limits are 10 times more onerous than they need to
be. Restricting limits to a quarter of 1% of total forest resource
per annum when you are running a 30 year reforestation programme
is excessive to the extreme. It is not doing the planet any good
because we have the opportunity to utilise a renewable resource
instead of effectively encouraging forest degradations in the
Pacific rim and South America.
Great isn't it! As an eco-friendly timber merchant you try
and do something for the environment, while our state government
bureaucrats effectively increase the price of an environmentally
sustainable product, thus encouraging irresponsible logging practices
in the poorer countries of the world and the very substantially
increase in our importation of non-environmental timbers. Let's
not also forget that at the same time these bureaucrats have also
managed to decimate the job market within the Australian timber
industry.
Has anyone ever considered the need for an environment levy on
non-sustainable imports so that we at least have a level playing
field?
Keith Mackenzie Managing Director
Feature Article; Twenty Questions - Part 2
Q. Can T&G flooring be used outside?
A. Yes narrow board T&G floors can be laid on an external
veranda or patio. I say that because I have a Baltic Pine veranda
floor installed at my own 100 year old house. Unfortunately I
would not recommend the installation of a T&G floor outside
as timbers continually expand and contract when they get wet or
dry out. This natural movement loosens the nails and gluing and
eventually results in the boards chattering as you walk on them.
However, if you insist..., my boards are laid on joists and
have not been glued. I suggest that you do not lay a board wider
than 100mm, do not clamp the boards when laying them and also
lay the floorboards lengthwise leaving a space at least 10mm on
each side. I also suggest that the timber finish is applied on
the top and underside of the boards. This method of fixing allows
the floor to move and should not result in the floor doming or
pushing out the bricks on any side walls.
Q. Do antique timber beams leach?
A. Yes. The outer pores, do however clog up and seal the timber
over time. Every time any timber is dressed the new surface pores
need to seal. Cabots D-K helps reduce the leaching but cannot
prevent it totally. For cleaning up timber leaching stains use
Oxalic Acid - a poisonous, colourless crystalline organic acid,
found in many plants, such as spinach. It's also used as
a bleach and rust remover and is available at most hardware stores.
Q. What can I do to preserve my timber floors?
A. The most common factors that reduce the life of a timber floor
are: a) moisture; b) termites; c) surface indentations; and d)
excessive sanding.
- Your floor should be kept dry. When floors are affected by moisture
they can lift and cup. Precautions should therefore be taken to
keep them dry and also properly acclimatise them before laying.
If your sub-floor is damp you should always look to improve the
air circulation, apply concrete slab sealers and include a plywood
barrier in the sub-floor structure (even between bearers).
- Termites are also attracted to damp sub-floor environments and
softwood floors. There are no guaranteed precautions against termites,
though you can reduce the risk by keeping the sub-floor really
dry and using hardwood timbers. Various products, such as Timber
Plus - a clear wood preservative, also claim to be effective.
- Surface indentations can be limited by selecting more rugged
hardwood floors, such as spotted gum and red ironbark. Scratches
can also be covered by applying floor waxes which fill the scratches
thereby reducing the light refraction which emphasises the surface
damage.
- Finally, floors should not be sanded excessively. An experienced
floor sander will usually only take 1-2 mm off the surface and
subsequent resanding should only remove the top finish layers
without getting back to the timber again.
Q. What is the best timber for decking?
A. Ironbark, tallowwood and select grade spotted gum. These timbers
have fewer surface imperfections and gum vein than other timber
species which means that water and dirt do not accumulate on the
surface - which means less potential for rotting.
Q. Can I stop my pergola from going grey?
A. Only if you apply a timber stain to a newly dressed timber.
New timber surfaces react to UV light and oxidise over time. Finishes
applied to newly dressed timbers merely retard the oxidisation
process. The only real way to avoid the greying of the timber
is to regularly reapply clear finishes and lightly sand back the
new surfaces.
Q. Can I get timbers for staircases and decking to match
my internal flooring?
A. Internal timbers, yes, absolutely no problem at all. Due to
the difficulty in obtaining large timbers these days it may however
be necessary to utilise laminated stair treads and landings. When
it comes to matching internal timbers with external decking it
is more problematic because we would only ever advocate the use
of a select grade spotted gum tallowwood or ironbark for external
decking. The decking will also go grey over time.
Q. Are there any practical differences between a 10-12mm
and 19-22mm board?
A. Not at all (other than cost!). In fact it amuses me that the
public at large perceive that there is inherent value in having
thicker floorboards. When thin floors are laid onto concrete there
is absolutely no way that you can tell the thickness of the floor
from above. It is arguable that thin floors are more stable than
thicker floors and are less likely to cup because there is less
tension within the timber floor boards. The flooring glues that
are now available are also a lot stronger than the timber floorboards
themselves. Another misnomer is that the traditional thicker boards
sound different - we believe this is debatable because the
thinner board is absolutely solid on a concrete floor and when
laid on solid plywood on top of bearers it also takes on the acoustic
properties of the solid plywood. In addition, when laid on plywood
the thinner boards are protected from subfloor moisture by the
layers of plywood and glue. Another advantage with the thinner
floorboards is that they take up less height and it is easier
to match the height transitions between carpet and timber areas.
One final thing, the thin floorboards are more environmentally
friendly as less timber is utilised.
| Species |
Colour |
Hardness Rating |
Durability Rating |
Strength Group |
| Alpine Ash # |
Light straw |
5 |
4 |
SD4 |
| Mountain Ash # |
Light straw |
4.9 |
4 |
SD3 |
| Blackbutt |
Pale yellowish brown |
9.2 |
2 |
SD1/SD2 |
| Box - Grey |
Dark browns & reds |
13.1 |
1 |
SD1 |
| Brush Box |
Pinkish grey / reds / browns |
9.1 |
3 |
SD3 |
| Ironbark - Grey |
Dark browns & reds |
16.3 |
1 |
SD1 |
| Ironbark - Red |
Dark reds |
14.0 |
1 |
SD3 |
| Kauri - N.Z. |
Pale pink / reddish brown |
3.3 |
4 |
SD8 |
| Karri -W.A. |
Pink / dark reddish brown |
9.0 |
3 |
SD2 |
| Mahogany - Red |
Dark red |
12.0 |
1 |
SD3 |
| Messmate |
Yellowish to greyish brown |
7.1 |
3 |
SD3 |
| Pines - Baltic |
White / pale yellow |
2.5 |
4 |
SD8 |
| Pines - Cypress |
Pale/dark yellow |
6.6 |
4 |
SD6 |
| Spotted Gum |
Pale to dark browns |
11.0 |
2 |
SD2 |
| Sydney Blue Gum |
Dark pink to red brown |
9.0 |
3 |
SD3 |
| Tallowwood |
Yellowish brown / olive tinge |
8.6 |
1 |
SD2 |
| Turpentine |
Dark pink to reddish brown |
12.0 |
1 |
SD3 |
# These Ash varieties are collectively and commonly
referred to as Victorian Ash. Tasmanian Oak is a combination
of these and other distinctive ash varieties found
in Tasmania.
## When it comes to structural beams and posts, strength,
toughness, elasticity, shrinkage, weight, stability,
lyctid borer susceptibility, edge splintering all
need to be taken into account. Further details are
available on the internet.
### Ironwood's feature beams and posts are old timbers
that have usually been modified in their previous
fitting. We therefore do not provide ratings on these
timbers as they are sold purely for aesthetic purposes. |
Our warehouse and display rooms
are conveniently located in Rozelle (near the ANZAC Bridge). Come
in and visit us, we are open Mon-Fri 7:30 a.m. - 5:00 p.m. and
Saturday 9:00 a.m. - 3:00 p.m
©2003 Australian Ironwood Antique Timbers Pty Ltd. All rights reserved.
If you would prefer not to receive further newsletters from Ironwood, please click on the following email link and send a message with or without any text. Unsubscribe
|