|
For Timber:
Timber is the most versatile and user-friendly building
material we have, but it needs to be looked after -
both because it’s becoming harder to get (with depletion
of our forests leading to closure of remaining stands)
and because it’s a natural product and as such, interacts
with the environment. It does this in a number of ways
- it swells and shrinks with changes in humidity; it
is bleached and aged by sunlight and weather.
Most importantly,
there are a whole bunch of organisms that have evolved
to regard it as a fine dinner. Our first line of defence
against the effects of weathering has always been and
still is: OIL. That is to say, vegetable or wood
oils - in particular, the oil from seeds of the Flax
plant, usually called Linseed. This is also a natural
product, so we have to protect it from the environment
as well, or all we achieve is to give a lot of mould
and fungi a free meal. The most “green” way to do this
is with Zinc Oxide, which is non-toxic but the bugs
don’t like it.
This is why we recommend
all exterior timber receive a coat of First Base Primer
before anything else. To protect the timber - the paint
is there to look good, but the primer is there to work.
Watch those cut ends too - the end grain need a coat
more than anywhere else!
For new timber:
Water-based:
| First
Base Primer |
1
coat - well worked in by brush. |
| 100%
Acrylic Finish (Either PX3 Gloss Acrylic or Timbercolour
LoSheen) |
2
coats by brush, roller or spray. |
Oil-based:
| First
Base Primer |
1 coat
- well brushed in |
| Link
Undercoat |
1 coat
- generously by brush, roller or spray |
| RockHard
Enamel |
2 coats
- by brush, roller or spray |
For old timber:
The thing to remember
here is that paint, and particularly oil-based (alkyd)
paint, will continue to age even after you paint over
it. This can lead to the situation where you have a
perfectly good paint job, quite young in itself, failing
disastrously because the surface it’s painted on to
(old paint) is dying of old age and peeling off the
wall. There is one way, and one way only, to prevent
this - and its called PREPARATION.
Either of the above
systems will work perfectly well on old timber if the
original paint and all the weathered surface wood is
first completely removed by burning, sanding or planing.
This is not necessary in the case of sound, 100% Acrylic
paints, however, as they age differently and can better
handle multi-coat applications and age differences.
For aged acrylics a good scrub with a little detergent,
a broom and lots of water is sufficient, followed by
two coats of the fresh Acrylic paint.
If you would like
more detailed information for your situation, or would
like us to inspect your building before you start work,
just contact us by phone, fax or email.
For Fibro, Hardplank, Masonry
and Stucco:
These
materials in general need less protection and are more
stable that timber. They don’t need First Base Primer,
and in some cases, don’t need a primer at all.
Water-based:
| PX10
Primer/Undercoat (not normally required on fibro,
masonry or stucco) |
1
coat |
| 100%
Acrylic (Timbercolour LoSheen or PX3 Gloss |
2
coats |
Oil-based:
| Link
Undercoat |
1
coat |
| RockHard
Gloss Enamel |
2
coats |
|