Exterior Timber Cladding
White Cypress Sawn-Face Cladding
Callitris Glaucophylla - Native White Cypress Pine
A kiln-dried board milled in native timber,
harvested from licensed forests, and a durable
alternative to hardwood or composite
fibreboard
Timberzoo stocks a timber cladding which is prefect for
building projects in a coastal and bushland setting. Our
Sawn-Face Cladding is available in both 80mm and
105mm cover, in shiplap profile with tongue and groove, and
has a texture defined by the shallow arc of a bench saw. The
visible kerf marks are more compelling as the years pass;
colours leach to silver-grey and timber-clad buildings seem
to merge with trees, shrubs and grasses when founded in a
native garden setting.
KD White Cypress Sawn-Face Cladding is Durability
Class 2 (in-ground) with a durable heartwood. It can be used
in BAL-12.5 and BAL-19 category bushfire zones for
residential building only above 400mm from ground. The
timber is Lyctid borer and termite resistant. The profile
allows vertical or horizontal fixing of the same board - the
rebate having a slightly eased-edge on the lower edge.
Walls should be oiled post-installation, then every three
years, with Sceneys Decking Oil - or a similar penetrating
protective oil. The oil treatment rejuvenates the exposed
surface layer - which dries in harsh sunlight over the years -
by replacing the natural resinous waterproofing of white
cypress. We strongly recommend that you allow the timber
to age this natural way - though it can take several years to
form a silver-grey.
There are commercial timber treatments and coatings
available which can supply a very even tone to walls to
overcome the shading effects in natural weathering that
bother some people. We do not stock or supply any products
other than Sceneys Decking Oil - however, our Woodshed
displays at Timberzoo show a few of these, and we have
complied a list of them for you.
Products that attempt a weathered silver-grey patina by
chemical wash, oil tint or water-based finish are listed as
follows. Search these brands online to discover more about
them:
a.
Woca Exterior Wood Oil - with a range of tints including
Wharf Grey
b.
Grimes & Sons - Controlled Erosion Stains - including
weathered grey tones
c.
Intergrain NaturalStain - including Driftwood tint
d.
Cutek Colourtone - including Grey Mist
e.
Haymes Woodcare Exterior range with several grey tints
f.
Sioox Wood Coatings - chemically alter the tannins in
surface of timber
Products that give a traditional Japanese char-black effect:
g.
Porters Palm Beach Black - Shou Sugi Ban timber-look
without burning or scorching
FAQs
Why is White Cypress a sustainable native timber?
Before European settlement, Callitris stands formed part of
a mixed-species open woodland in the regions where dense
forests now predominate. Callitris agressively colonised
native grasslands grazed by sheep and cattle, and became
a dominant species when ironbark (E. Crebra) stands were
harvested. These new cypress forests are now sustainably
harvested under licence to an annual limit of sawlog without
reducing the volume (number of viable trees) under
management or their extent in central western New South
Wales.
Can 80mm or 105mm cladding be secret nailed?
No, both sizes require face nailing with galvanised 50mm x
2.8mm gauge nails or ring-shanked galvanised nails. Two
nails per board in face. The fixings have low visibility in the
coarse texture of Sawn-Face Cladding. See both Timber
Queensland TDS Cladding and the new Boral Cladding
Installation Guide for fixing details. Recommendations for
hardwood and cypress cladding are alike.
Can I order set-lengths or are boards in random-
length packs?
There is a limited range - but yes, you can order set-lengths.
Since most installations are vertical, we stock lengths of
3.0m, 3.6m and 5.4m to cover the most common wall
lengths and allow offcuts to be used above windows and
doors. These lengths are likely to minimise wastage on
horizontal installations too - and you should determine your
length spread before placing an order. The cladding lengths
given are mostly finger-jointed boards.
What are the fire properties of White Cypress
cladding?
Callitris is not included on BRT list for BAL-29 nor included
on E1 Table of dense timbers >750kgs/m3 (although
certified tests have established density of dryland Callitris at
760-775kgs/m3). Can be used above 400mm from ground in
BAL-19 zones.
Spread of Flame Index - 8
Smoke Developed Index - 3
Critical Radiance Flux Range - 2.2 up to 4.5
Smoke Development Rate - < 750
Fire Properties Group No - 3 (slightly combustible)
Is there an installation guide for Sawn-Face cladding?
The best guide for installation according to the current
Australian Standard is the recently updated Boral Cladding
guidelines. It was completed with input from industry groups,
Timber Queensland and Wood Solutions. The Guide applies
to both White Cypress and hardwood shiplap cladding.
How do I get a quotation for Sawn-Face cladding?
Please send us your total square metre requirements and
town / suburb for delivery. One of our Sales Team will supply
a quotation price including delivery, plus PDF advice sheets
and images.
Click any image to enlarge
Peter Winkler Architects