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Durapine Applications

Code Acceptance
Durapine treated wood meets requirements of model building codes for many applications, and a code evaluation report has been issued. See ES Report for allowable values and/or conditions of use. Such reports are subject to re-examination, revisions, and possible closing of file. The preservative treatment is listed in the standards of the American Wood-Preservers’ Association and is suitable for above-ground and ground contact applications (Use Categories UC1, UC2, UC3, UC3B, UC4A, UC4B and UC4C). Internationally, it is approved by government and trade agencies throughout Europe and in Australia, New Zealand, and Japan.


Different applications may require different amounts of preservative protection. Below are the standards of the American Wood-Preservers’ Association for the copper azole formulations.

Intended End UseCopper
lbs / cu ft
Typical Applications
Decking*0.05Sapwood species: decking
and specialties
Exterior Construction
Above Ground
0.05Decking, deck joints, railings,
fence pickets
Ground Contact or
Fresh Water
0.14Fence posts, structural lumber
and timbers, guardrail posts,
utility poles in low decay regions
Ground Contact or
Fresh Water or
Important Structural
0.23Permanent wood foundations,
sawn & round building poles,
utility poles in moderate
decay regions

*Recommendation of building code report, not AWPA

Click here more info on µCA-C and retention comparisons with other preservatives.

Durapine Dissolved and Dispersed

Specification Guide for DuraPine Treated Wood

To see the table summarizing Cox treatments and corresponding retention levels for DuraPine and Wolmanized wood, click here.



Cell Penetration Study

DuraPine Outdoor Wood Specifications

Accessories – Recommended Hardware

Hot-dipped galvanized fasteners (meeting ASTM A 153) and connectors (ASTM A 653 Class G185 sheet), or better, are recommended for protection against moisture often present where treated wood is usually used. For Permanent Wood Foundations use 304 or 316 stainless steel. Aluminum should not be used in direct contact with this wood.For indoor applications, while galvanized fasteners are preferable, the use of non- galvanized nails or screws of sizes and types approved by the Model Code is acceptable when attaching joists, studs, or other framing to Wolmanized sill plate, provided the wood will remain dry in service, protected from weather and water. Likewise, the use of standard galvanized strapping, anchor plates, or mild steel anchor bolts ½” diameter and larger is acceptable for fastening Wolmanized wood to foundations, provided that the wood will remain dry in service, protected from the weather and water.Hardware Manufacturers
Manufacturer Recommendations: Simpson StrongTie

Manufacturer Recommendations: USP Connectors