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Fencing (EnviroSlat) Fixing Guidleines
Fencing (EnviroSlat) Fixing & Handling Guidelines
It is important to ensure that EnviroSlat is not exposed to direct sunlight or excessive temperatures while
stored in packs in order to reduce excessive heat build-up. EnviroSlat must be stored flat and dry and off the
ground; Standard 5.4 metre long packs of EnviroSlat require a minimum of seven gluts (supports) under the
pack or be placed on an appropriate length custom length pallet for proper storage.
Working with EnviroSlat
EnviroSlat will expand or contract in length with rising or falling temperatures. All boards should be
conditioned before cutting so that they are at an even temperature. Boards are best cut in the shade before
they are exposed to radiant heat, in the morning.
When cutting lengths of EnviroSlat you should take in to account the temperature of the conditioned boards
and allow for expansion or contraction of the boards based on the likely temperature fluctuations over the
year at the site. You should allow for some expansion between boards that are butted together or where
boards are butted against a post or other structure. We recommend a minimum 5mm gap between the end of
an EnviroSlat board and any frame, fixed surface or another board. EnviroSlat will expand by approximately
7-9mm (3-4.5mm at each end) over a board length of 5400mm based on a temperature increase of 40
degrees Celsius. The surface of EnviroSlat could be as much as 25 degrees Celsius warmer than the ambient
temperature when subjected to continuous direct sunlight. Therefore the board could reach a surface
temperature of up to 65 degrees Celsius on a day when the ambient temperature reaches 40 degrees Celsius.
EnviroSlat is designed to be fixed directly to posts that are fixed in/on the ground. The posts can be
made of timber, steel or aluminium and need to be of a suitable cross section and strength to hold the
intended fence size/weight.
Futurewood provides a range of 2400mm long black powdered coated aluminium fence posts in either
30mm x 30mm, 50mm x 50mm or 65mm x 65mm as well as a 30mm x 16mm x 1800mm “U” channel
specifically designed for use with the 70mm x 15mm EnviroSlat boards.
The maximum span for continuously fixing EnviroSlat boards is 900mm between support posts
in order to minimize flexing caused by thermal expansion/contraction of the boards. For single
spans the maximum distance between support posts is 600mm.
Spacing between slats comes down to personal preference and the amount of privacy, shade and air
flow that is required.
Fixing - Decorative Cladding
EnviroSlat decorative cladding boards can be fixed with 10 gauge countersunk screws inserted through
the front face of the board. It is recommended that you pre drill and pre countersink all the holes for
the screws. All holes should be 1-2mm larger than the shank of the screw but not too large so that they
are still hidden under the head of the screw. Do not over tighten the screw and ensure that it does not
bury in to the surface of the EnviroSlat board. Screws should be positioned a minimum of 25mm from
any profile edge for the 70mm x 15mm profile and 15mm for the edge for 40mm x 30mm profile to
avoid any risk of the boards splitting.
Fixing – Fencing/Screening
EnviroSlat boards can be fixed with screws inserted through the front face of the board (front fix)
where the screw head will be visible. Button head, wafer head or countersunk screws in either 8 or 10
gauge should be used to front fix EnviroSlat boards. When front fixing it is recommended that you pre
drill all the holes for the screws. If using countersunk screws both the hole and the countersink need to
be pre-drilled. All holes should be 1-2mm larger than the shank of the screw but not too large so that
they are still hidden under the head of the screw. Do not over tighten the screw and ensure that it does
not bury in to the surface of the EnviroSlat board. Screws should be positioned a minimum of 25mm
from any profile edge for the 70mm x 15mm profile and 15mm for the edge for the 40mm x 30mm
profile to avoid any risk of the boards splitting. When using the Futurewood aluminium “U” channel to
hide the ends of the boards, screws can be fixed from the rear through the “U” channel. The “U”
channel should be pre-drilled and the board is fixed with an 8 gauge x 10mm -15mm long coarse
threaded button or wafer head wood screw. The “U” channel has a feint screw line on one face so that
the screws can be lined up evenly from board to board. Take care to make sure that the “U” channel is
fixed so that the face with the screw line is on the back side of the fence/screen.
All screws should be plated or made from stainless steel or brass
If coloured screws are required we recommend pre-painting your screws before installation
EnviroSlat profiles should be fixed with one screw at each support point
Nailing is not recommended for securing EnviroSlat
Colour & Surface Finishing
The colour of your EnviroSlat board will weather in the first 4-12 weeks of exposure to the elements. After
the initial weathering process the colour will be maintained over many years with only very slight changes
year on year. The manufacturing process does allow for a very slight variation in colour from board to board
and batch to batch of material. Slight colour change may also occur over time as part of the natural
Rough edges on cut ends can be removed using a fine abrasive paper.
EnviroSlat should be washed down periodically with a strong solution of household detergent (“Handy
Andy” works well) in order to clean off accumulated dirt/grime.