Water-borne Preservatives and Retentions by Use Category | ||||||||||||||||
Arsenicals | Non-Arsenical Copper Preservatives | Other Preservatives | ||||||||||||||
USE CATEGORY | SERVICE CONDITIONS | USE ENVIRONMENT | COMMON AGENTS OF DETERIORATION | TYPICAL APPLICATIONS | COMMODITY | CCA | ACZA | CuN-W | ACQ-D | MCQ | CA-C | MCA | KDS | CX-A | EL2 | PTI |
Chromated copper arsenate | Ammoniacal copper zinc arsenate | Copper Napththenate | Alkaline Copper Quat | Micronized ACQ | Copper Azole | Micronized CA | Alkaline Copper Betaine | Copper HDO | DCOI & Imidacloprid | Propiconazole, Tebuconazole, Imidacloprid | ||||||
Retentions in pcf | ||||||||||||||||
Retention Source-> | AWPA | AWPA | AWPA | AWPA | ICC ES | AWPA | AWPA | AWPA | AWPA | AWPA | AWPA | |||||
UC1 | Interior construction Above Ground Dry | Continuously protected from weather or other sources of moisture | Insects only | Interior construction and furnishings | These uses not applicable regarding preservative usage | |||||||||||
UC2 | Interior construction Above Ground Damp | Protected from weather, but may be subject to sources of moisture | Decay fungi and insects | Interior construction | ||||||||||||
UC3A | Exterior construction Above Ground Coated & rapid water runoff | Exposed to all weather cycles, not exposed to prolonged wetting | Decay fungi and insects | Coated millwork, siding and trim | ||||||||||||
UC3B | Exterior construction Above Ground Uncoated or poor water run-off | Exposed to all weather cycles including prolonged wetting | Decay fungi and insects | Decking, deck joists, railings, fence pickets, sill plates, uncoated millwork | Sawn Product | 0.25 | 0.25 | 0.07 | 0.15 | 0.15 | 0.06 | 0.06 | 0.19 | 0.206 | 0.019 | 0.013 |
Plywood | 0.25 | 0.25 | NL | 0.15 | NL | 0.06 | 0.06 | 0.19 | 0.206 | 0.019 | 0.013 | |||||
UC4A | Ground contact or fresh water Non-critical components | Exposed to all weather cycles, normal exposure conditions | Decay fungi and insects | Fence, deck, and guardrail posts, crossties & utility poles (low decay areas) | Sawn Product | 0.40 | 0.40 | 0.11 | 0.4 | 0.34 | 0.15 | 0.15 | 0.47 | NL | NL | NL |
Posts | 0.40 | 0.40 | 0.11 | 0.40 | NL | 0.15 | 0.15 | 0.47 | NL | NL | NL | |||||
Plywood | 0.40 | 0.40 | NL | 0.40 | NL | 0.15 | 0.15 | NL | NL | NL | NL | |||||
UC4B | Ground contact or fresh water Critical components or difficult replacement | Exposed to all weather cycles, high decay potential includes salt water splash | Decay fungi and insects with increased potential for biodeterioration | Permanent wood foundations, building poles, horticultural posts, crossties & utility poles (high decay areas) | Sawn Product | 0.60 | 0.60 | NL | 0.60 | NL | 0.31 | 0.31 | NL | NL | NL | NL |
Posts | 0.50 | 0.50 | NL | 0.50 | NL | 0.25 | 0.25 | NL | NL | NL | NL | |||||
Plywood | 0.60 | 0.60 | NL | 0.60 | NL | 0.31 | 0.31 | NL | NL | NL | NL |