Installation Procedure for

Australian cypress (Callitris Glauca) like all timber is a "natural" material and is subject to dimensional movement with change in seasonal conditions. Whilst designAclad is kiln dried (approx. 14%) to minimize movement, the following points should be observed to assist installation.

TRANSPORT AND ON-SITE STORAGE

Ensure suitable on-site storage location is available before delivery. All designAclad should be protected from the elements during loading, transportation and unloading. Store under cover protected from the elements, direct sun and where the atmospheric moisture content is similar to the level expected on your building. Timber packs should be stored at least 50mm off the ground/concrete, with even supports to maintain straight boards and to allow good ventilation to all pack faces. Keep packs strapped until ready for use. designAclad comes wrapped in plastic for transport and minimal on-site storage and should not be exposed to direct sun as this limits air circulation and may cause sweating. Do not store on fresh concrete floor as timber will absorb this moisture.

IF UNSURE PLEASE CONTACT US - www.frencham.com.au Ph. 03 5245 8004

INSTALLATION RECOMMENDATIONS

  • Where designAclad is to be finished with a surface coating, each board must be fully coated (front, back and sides including docked and end matched ends). Additional coats should be applied after installation to paint manufacturers recommendations.
  • A SARKING or VAPOUR BARRIER must be used behind designAclad to direct water, (that may have penetrated the cladding) back to the outside. Sarking must be weather proof but also vapour permeable (ie: not perforated or absorbent type). Install to manufacturers recommendations. Adequate flashings must be provided at corners, around openings and also wall plates to assist in moisture management.
  • It is "good practice" and is recommended that the barrier separating the exterior cladding should form a minimum 20mm vented cavity. This allows for the drainage of any moisture that has penetrated the exterior cladding or condensation that may form on the rear face of the cladding. refer to Fig. 3
  • To ensure maximum weather resistance, boards orientated in a horizontal or diagonal manner should be installed with tongue located upwards.
  • If using a dressed face designAclad, the presence of mill glaze needs to be considered. Refer to: Finishes on our website.
  • To allow for seasonal variations and changes in equilibrium moisture content (EMC), an Expansion Joint must be provided. This is achieved by removing the back groove section of board as shown in Fig 2. and Fig 3. (TO BE DONE BY BUILDER)
  • All ends and joins (other than end-matched) in boards are to be pre-drilled prior to nailing or screwing and should be located behind a framing member to minimize movement.
    Note: TWO FIXINGS ARE REQUIRED AT BOARD ENDS.
  • End-matched boards need not be joined over a framing member, however leave at least two rows of boards between end-joints in similar locations.
  • Where end-matched boards are used in a vertical application, ensure that the tongue end of the board is located upwards and should be installed so tongue and groove are fully together. Groove joint in board should face away from prevailing weather to reduce the ingress of wind-blown water. Bottom of boards should be back cut a minimum of 5 to allow water drip point.
  • Ensure tongue and groove end matches, all holes and gaps are sealed with suitable flexible polyurethane sealant.
  • Sawn face designAclad can be left untreated to weather naturally to a "silver-grey", however, to assist in prolonging the service life, a quality coating or pre-treatment can be applied. Dressed face designAclad used externally should be finished with a quality coating and maintained. Failure to do so will result in surface checking and reduced service life. For more information, refer to: Finishes on our website.
  • designAclad is designed to be face nailed or screwed at support centres ranging from 400mm to 600mm, depending on wind zone. For placement of screws. refer to Fig 1

EXPANSION JOINT REQUIREMENTS

An Expansion Joint is required to allow for seasonal variations and changes in equilibrium moisture content (EMC).
Expansion joints (See Fig 2) are required:

A. in both Vertical and Horizontal applications;
B. at maximum 2.7 metre spacings;
C. at a change in storey.

DESIGNACLAD_FIGURE2.PNGDESIGNACLAD_FIGURE3.PNG

FIXING RECOMMENDATIONS

Screw fixing is recommended as experience has shown that over time, nails can 'work out' of the face of the cladding.

Fixings should be chosen for their corrosion resistance to suit the environment in which they are to be used.

Fixing types
Nails:
Hot-dipped galvanized or stainless steel nails are recommended. Generally, nails should have a length of no less then three times the board thickness being fixed. As Cypress is extremely dense and tight - grained, care is needed when nailing as some splitting can occur. Where possible use blunt or shear point nails or alternatively remove the points of gun nails by grinding prior to installation. This will reduce the likelihood of splitting the board. For hand nailing, a better result is achieved when the nail points are blunted slightly with a hammer prior to nailing. Alternatively, holes can be pre-drilled. Pre-drill boards slightly smaller in diameter (80%) than the nail when nailing less than 50mm from board ends.

DESIGNACLAD_FIGURE1.PNGdesignAclad - 23mm sawn face
Screws

Use a min 7 gauge x 50mm type 17, square drive screw in
pre-drilled holes.
Nails
Framing - Cypress or Hardwood
Gun nailing - 50 x 2.8mm helical shank, flat/domed head
Hand nailing - 60 x 2.8mm plain shank
Framing - Softwood
Gun nailing - 50 x 2.8mm ring shank, flat/domed head
Hand nailing - 65 x 2.8mm plain shank

designAclad - 20mm dressed face
Screws

Use a min 7 gauge x 50mm type 17, square drive screw in pre-drilled holes.
Nails
Framing - Cypress or Hardwood
Gun nailing - 50 x 2.8mm helical shank, flat/domed head
Hand nailing - 60 x 2.8mm plain shank
Framing - Softwood
Gun nailing - 50 x 2.8mm ring shank, flat/domed head
Hand nailing - 60 x 2.8mm plain shank

designAclad batten - 36mm sawn face & 33mm dressed face
Use a min 7 gauge x 65mm type 17, square drive screw in pre-drilled holes.

designAclad is an innovative Cladding System with a Registered Design, produced from Australian Cypress

DESIGNACLAD_FIGURE4.PNGDESIGNACLAD_FIGURE5.PNGDESIGNACLAD_FIGURE6.PNGDESIGNACLAD_FIGURE7.PNG

Download onsite brochure

 
   
Top of Page   Home   Contact us  Back © Frencham Cypress - designAclad    Site design by Pagination