Specification

Suitability of fasteners for Decking Species & Dryness
Avoid using hidden fasteners with poor quality deck materials with high expansion and contraction rates
23
Species Other Names Dryness Hidden Fastener Face Screw
Extreme
TM
Extreme4
TM
ExtremeKD
TM
ColorMatch
Screws
Ipe
Brazilian Walnut,
Lapacho, Tabebuia
Air Dried 16 to 20% YES YES
NO, wood will shrink
and nished gap will
be large.
YES
Pine
Kiln or Air
Dried
No, wood will shrink
off clip.
No, wood will shrink
off clip.
No, wood will shrink
off clip.
YES
Tigerwood
Muricatiara,
Goncalo Alves
Kiln Dried 14 to 16%
NO, wood could
expand and cause
buckling.
YES YES YES
Air Dried
NO, this species should
be kiln dried for
decking use.
NO, this species should
be kiln dried for
decking use.
NO, this species should
be kiln dried for
decking use.
YES, but this species
will be unstable unless
kiln dried.
Garapa Brazilian Ash Kiln Dried
NO, wood could
expand and cause
buckling.
YES YES YES
Air Dried
NO, this species should
be kiln dried for
decking use.
NO, this species should
be kiln dried for
decking use.
NO, this species should
be kiln dried for
decking use.
YES, but this species
will be unstable unless
kiln dried.
Massaranduba Maçaranduba Kiln Dried 14 to 16%
NO, wood could
expand and cause
buckling.
YES YES YES
Padouk Padauk, Vermillon Air Dried
NO, this species should
be kiln dried for
decking use.
YES YES YES
Acacia Kiln Dried
NO, wood could
expand and cause
buckling.
YES YES YES
Bankirai Balau Kiln Dried
NO, wood could
expand and cause
buckling.
YES YES YES
Tatajuba Kiln Dried
NO, wood could
expand and cause
buckling.
YES YES YES
Merbau Kiln Dried
NO, wood could
expand and cause
buckling.
YES YES YES
Many other quality species of hardwood decking may be suitable for use with DeckWise® hidden deck fasteners,
provided they are properly dried and do not have a high expansion or contraction rate.
Where both Extreme4
TM
and ExtremeKD
TM
is a option, it is typically a preference of the size of Gap spacing
desired for looks. ExtremeKD
TM
is a larger Gap.