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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-NES Report # NER-643 which allows for use of triple zinc polymer coated fasteners in contact with ACQ treated woods.
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| 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. |
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| 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. |
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| Tropical Wood Decking: (e.g. Mahogany, Ipe, etc.) |
| Use PHEinox stainless steel screws by GRK. Due to movements of these
woods many importers recommend pre-drilling. |
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| Composite & Plastic Decking: |
| For best performance use PHEinox stainless steel screws by GRK. |
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| Ledger Boards & Structural Parts: |
| Use RSS Structural Screws by GRK as a lag screw alternative to get exceptional strength. |
NO PRE-DRILLING FOR R4, RSS, CABINET AND TRIM HEAD SCREWS, EXCEPT WHERE WOOD LIMITATIONS REQUIRE. ALWAYS PLACE DECK BOARDS WITH OUTER EDGE OF GROWTH RINGS FACING UP. DO NOT USE DECK CLEANERS WHICH CONTAIN BLEACH WITH COATED METALS. CONSULT WOOD SUPPLIERS / MANUFACTURER’S RECOMMENDATIONS. DECKING SCREWS SHOULD BE COUNTERSUNK 1/8".
GRK Fasteners utilizes strict quality control procedures. Every batch of screws produced is independently random sampled and quality controlled to the highest standards.
Accreditations for independent test laboratories include:
ISO, ICBO, ICC, CNLA, TÜV, DAR, Ü
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Technical Data has been updated effective March, 2010
Please consult the "GRK Canada" site for Technical Data by clicking here
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