Architext05 wrc Shakes Shingles - Tilling Timber

Shingles—450mm long
An attractive smooth sawn appearance
on both faces. Available in No. 1 Blue
Label (Premium clear grade, fully
quarter sawn—recommended for
roofing), or No. 2 Red Label (General
purpose grade with limited sap wood.
Contains both quarter and back sawn
Shakes—600mm long
One sawn and one textured face split
naturally along the grain—the
appearance and feel is far less regular
than shingles. Only one grade is
distributed by Tilling Timber.
WALLS
Shingles and Shakes can be applied to internal or external walls with a solid nailing base. Timber battens must be applied over brick or other
nail resistant surface.
Coverage Walls
Measure area in square metres. Deduct windows, doors etcetera. From
table, determine coverage per bundle at intended recommended
exposure. Divide area by coverage, adding 5% to give required number of
bundles. Note: Greater exposures are only possible in non weather exposed applications.
Exposure m/m
Archi text No. 5
WESTERN RED CEDAR SHAKES & SHINGLES
Suitable for cladding and roofing applications, Western Red Cedar Shakes and Shingles can
easily be installed by the handyman or professional. Over many decades, Western Red Cedar
Shingles and Shakes have established a reputation as attractive, natural and practical roofing
products. Cyclonic and high wind areas provide challenges for any fixing application. The
information provided below takes into account assessment tests carried out at the Cyclonic
Testing Station at the James Cook University of North Queensland.
Approximate Square Metre Coverage per Bundle
450mm Shingles 600mm Shakes
100 1.7 0.7
125 2.1 0.8
140 2.3 0.9
190 3.2 1.4
210 3.6 1.6
290 N/R 2.1
Exposure Limit—Walls
Shingles 210mm Shakes 290mm
Exposure: The portion of each Shake or Shingle left
uncovered.
Installation—Walls
Set out string line from the lowest common point on total job.
Fix lowest row of Shingles or Shakes spaced 5-10mm apart to
allow for expansion. Fix the second row of Shingles directly
over the first row to create a weatherproof double layer
situation. Straight edge or random set next row at required
exposure. Do not drive nail heads below timber surface.
Sarking
It is essential that only “breather type” (vapour permeable)
sarking products be employed beneath battens for either
cedar shingles or shakes roofs. In regions other than tropical,
it remains good practice to utilize vapour permeable sarking in
order to achieve optimum performance and maximum service
life for cedar Shingle and Shake roofing systems.
ROOFS
Installation -Roofs
Begin with a double or triple layer at gutter edge of roof. Nail Shingles so that following row will cover nails by 40mm. Use a straight edge to
line up rows of Shingles and Shakes. For quantity of Shingles or Shakes required, refer to table (Quantity Required—Roofs) on back page.
Valleys
Valleys must be constructed with utmost care and from durable materials to avoid leaks. Metal valley sheets, colourbond or fully painted
zincalume at least 500mm wide should be laid over double sarking and only nailed at extreme edge. Shingles and Shakes abutting the
valley should be trimmed 75mm from the centre line.
Battening
A Cedar roof may be laid on spaced battens or solid surfaced roofs. In normal conditions, 50 x 25mm or 75 x 25mm battens at centres the
same as the weather exposure intended, will be sufficient. In snow or cyclonic areas, special requirements apply. Refer Tilling Timber.

Hips & Ridges
Factory manufactured hip and ridge cappings are available to complement both Shingles and Shakes. Alternatively, after sarking, a hip or
ridge may be built by selecting uniform width shingles or shakes. Bevel cut exposed face and interlace between temporary straight edges on
either side of the hip. Mitred hips must be flashed with Alcor or lead flashing.
Flashing
Any structural members protruding through the roof should be flashed and counter flashed on all edges. Flashing should extend at least
150mm under the Shingles or Shakes and should be counter flashed. Metal should be painted after bending to shape, and be dry before
installation. A mastic or silicon caulk should be used to seal all possible water entry areas. Flashing may also be required at ridges or pitch
changes in complex roof structures.
Sizing up the Job: Roofs
Bundle sizes: The coverage per bundle depends on the exposure but will be around 2.3m² for Shingles and 1.4m² for Shakes at the
maximum recommended exposures. Pitch: The pitch of the roof is determined by the increase in height (the rise) over its length (the run). ie:
Rises: 150mm in 300mm Pitch = 1:2. Exposure: The portion of each Shake or Shingle left uncovered.
Exposure Limits: Roofs
Shingles 450mm long.
Pitch—1 in 3 and steeper.
140mm max. Minimum recommended pitch is 1 in 3 (18°).
Shakes 600mm long.
1 in 3 and steeper.
190mm max. *Minimum recommended pitch is 1 in 3 (18°).
A good Cedar roof should be a minimum three layers thick—maximum
exposures shown will achieve bare three layers and reductions in
exposure will result in additional roof thickness.
Coverage—Roofs
Exposure mm Square metres per bundle
140 2.3 0.9
190 N/R 1.4
210 N/R N/R
290 N/R N/R
Maintenance
The life span of Western Red Cedar Shingle and Shake roofs can vary from area to area, primarily because of different climatic conditions,
varying roof slopes and the presence of overhead vegetation. Thus it is almost impossible to predict accurately the life of a roof. It is possible
however, to increase the roof’s longevity through proper and regular maintenance. Wind blown debris such as leaves, pine needles and the
like should be removed from the roof on a regular basis by sweeping with a stiff broom or wire brush. This is basic but important housekeeping
because accumulated debris may retain moisture . Moisture retention is believed to be the major contributing factor to the growth of moss,
fungus and mildew, any or all of which may eventually cause decay and reduce the service life of the roof. Additional protection may be given
to Shingle and Shake roofs by the application of a proprietory timber treatment that contains an effective water repellant. When combined with
regular removal of accumulated debris, due care will enhance the service life of your roof.
Head Office : 31-45 Orchard Street, KILSYTH 3137 VICTORIA
Telephone: +61 3 9725 0222 Facsimile: +61 3 9725 3045 Email: sales@tilling.com www.tilling.com
FREECALL 1800 337 703 ABN 52 004 621 121
Revised June 2003
Shingles 450mm Shakes 600mm
Quantity Required—Roofing
Determine ground area of the building, including overhangs, in square metres. Calculate the pitch of the roof and increase ground area in
total by appropriate percentage.
1 in 4 Add 3% 1 in 1.5 Add 20%
1 in 3 Add 5½% 1 in 1 Add 42%
1 in 2.5 Add 8½% 1¼ in 1 Add 60%
1 in 2 Add 12% 1½ in 1 Add 80%
Divide adjusted area by coverage per bundle from (exposure limits) chart to determine quantity required. For Shingles, add 1 bundle per 8
lm of hips, ridges and valleys/1 per 3.3lm for Shakes. For Shingles, add 1 bundle per 18lm of perimeter to allow double starter course over
guttering. For Shakes, 1 bundle per 7½lm.
Nails
Fixing
Specification
No. 1 Blue Label
Shingles
Fixing Centres Hardwood Battens Softwood Battens
140mm 40 x 2.5mm flat head hot dipped galvanized
straight shank nails
No. 1 Shakes 190mm 50 x 2.8mm flat head
hot dipped galvanized straight shank nails
50 x 2.8mm flat head hot dipped
galvanized ring shank nails
50 x 2.8mm flat head hot dipped
galvanized ring shank nails
Use only corrosion resistant galvanized steel or stainless steel nails, fixed in accordance with specification.
For double coursing or non specified methods, consult your Tilling Timber stockist.