CLIMATEK coated screws have been
independently tested and approved for use in treated
wood products. Our fasteners come with a limited Lifetime
Warranty. For best performance use PHEinox stainless
steel screws by GRK.
Always build your project according to current ICC
(International Code Council) specifications. GRK’s
Climatek coating conforms with ICC-NESReport # NER-643
which allows for use of triple zinc polymer coated fasteners
in contact with ACQ treated woods.
Pressure Treated Lumber Decking:
Use #9 or #10 gauge GRK R4 to
lock wood in place. For best performance use PHEinox
stainless steel screws by GRK.
Cedar & Redwood Decking:
Use #9 or #10 gauge GRK R4 to
lock wood in place. Countersink screws by 1/8"
and seal wood immediately with a quality sealer to lessen
the likelihood of tanic acid stains. For best performance
use PHEinox stainless steel
screws by GRK.
Tropical Wood Decking: (e.g. Merbau (Kwila) Mahogany,
Ipe, etc.)
Use PHEinox stainless steel screws
by GRK. Due to movements of these woods many importers
recommend pre-drilling.
Composite & Plastic Decking:
For best performance use PHEinox
stainless steel screws by GRK.
Ledger Boards & Structural Parts:
Use RSS
Structural Screws by GRK as a lag screw alternative
to get exceptional strength.
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