The Installation Process

Andrew Everist
Posted in Cladding - Oct 05, 2017



1. We recommend hardwood cladding to be coated

all four sides with a quality oil based finish like Cutek CD50.

Pre-oiling available at Everist Timber.


2. Check that walls are straight and plumb.


3. Make sure there is adequate drainage provisions

in place to allow for any moisture inside cavity to



4. Install a vapour permeable membrane.*


5. Install battens over the vapour permeable membrane

no more than 450mm apart. Minimum

gap between cladding and paper

of 20mm is the preferred method of



6. Install flashings where necessary.*


7. Install internal and external corners. Traditional

timber corners or modern aluminium

profiles can be used. Timber and aluminium

corners must be sealed with an external silicone

and a foam tape.*





8. Horizontal Starter Board – If running your cladding

horizontally make sure the tongue side is facing

up. Create a starter board by ripping off the tongue

from the cladding and screwing to the bottom of

your wall. This will allow for a concealed fix finish

as per image below.

9. Vertical Starter Board – Rip off the tongue from

the cladding and screw up to external stop making

sure that the screw will be concealed by the next

board as per image below.


11. Mark out the board increments on the battens to

ensure that the expansion gap is allowed for and

to prevent progressive error and lines going out of



12. Start installing cladding from the starter board.

Using a countersink drill bit, pre drill a hole for

the screw to avoid the tongue splitting. This hole

must be in the concealed fixing area to prevent the

screw head from becoming visible with the natural

movement of the cladding As per image 1.

image 1.                                   


Face fixing is another recommended fixing method,

where two counter sunk self drilling screws are applied

to the face of every board at each 450mm batten simular to

fixing decking. Pre-drilling any end joins to prevent splitting.

See image 2.

image 2.


13. Move up or across the wall making sure everything

is level. Screw the tongue off at every batten until

you reach the top or end of the wall. Making sure

you have a watertight finish.




1. Make sure that any end grain or ripped edges are

sealed with the same product used to protect the



2. All end matched joins need to be sealed with a high

quality exterior sealant like Sika Pro or 11FC. If excess

sealant is visible after installation wait until it is dry before

cutting off with a chisel or knife making sure not to scratch the




Inclusion of vapour permeable membranes into the

building structure allows water vapour to pass through

the structure whilst preventing the entry of wind driven

rain (liquid water) from the outside environment both

during and after construction. When positioned against

the outside of the building frame as a wall wrap, these

membranes reduce the risk of condensation forming

inside the home and building structure.

A vapour permeable membrane such as Watergate

protective wrap range with a vapour permeability of no less

than 2.0ug/N.s and a water barrier classification of HIGH

must be installed to ensure the performance of your

cladding system. Watergate protective wrap product must

be installed as per manufacturers recommendations.



Position the vapour permeable membrane on the

external side of the building frame, with the cladding

spaced no less than 20mm from the membrane

to allow a drying and drainage path for moisture,

Watergate protective wrap membrane high water hold

out allows condensate to safely drain away from the

building without bleeding back through the membrane

as condensate. These membranes provide superior

permeability over perforated traditional ‘breather’ foils

and meet the AS4200.1 Water Barrier “High” water holdout

requirement for lightweight construction materials

such as Australian hardwood timber claddings.




Flashings at corners, doors, windows and wall

intersections must be installed to prevent water from

entering the cavity

Hardwood cladding should finish no closer than 150mm

from the ground, or a flashing should be installed to

prevent any water take up from the ground.



Fixing hardwood cladding to any wall or batten should

have fixings at no more than 450mm centres. There

must be a gap of 20mm behind the cladding to make

sure any moisture can escape. All walls should be

straight and plumb.


Traditional timber 32x32 internal and 57x32 external

stops can be used. Please see drawings for installation

process. As a stylish alternative to traditional stops,

there is an Aluminium range, available in natural

anodised clear and anodised black, both of which are

available fthrough Everist Timber.