Warranty Guide
For more information call 800-585-5161, or visit www.kopperspc.com.
NatureWood
®
CA brand pressure treated wood is treated with Alkaline Copper Azole Compounds. NatureWood
®
CA brand pressure
treated wood is produced by independently owned and operated wood preserving facilities. NatureWood
®
is a registered trademark of
Koppers Performance Chemicals Inc. © 9/2016
THE NATUREWOOD
®
CA
RESIDENTIAL & AGRICULTURAL
LIMITED WARRANTY
IMPORTANT APPLICATION INFORMATION
Fasteners
Fasteners - wood product pressure treated with NatureWood
®
CA brand alkaline copper azole compounds sold or
labeled as NatureWood
®
CA brand wood product (“NatureWood CA Wood Product”) is designed for long term
performance in outdoor applications and, therefore, requires high quality corrosion-resistant nails, screws, and
other fasteners and hardware.
For interior or exterior applications, use fasteners and hardware that are in compliance with the
manufacturer’s recommendations and the building codes for their intended use. As with any good design
and construction practices, NatureWood CA Wood Product should not be used in applications where trapped
moisture or water can occur. Where design and/or actual conditions allow for constant, repetitive, or long
periods of wet conditions, only stainless steel fasteners should be used.
Fasteners (and other metal products) for use with NatureWood CA Wood Product include:
Hot-Dip Galvanized - Fastener and hardware manufacturers have suggested the minimum hot-dip
galvanized requirements for use with treated wood should conform to the following ASTM Standards:
ASTM-A153 (for Hot-Dip fastener products) and ASTM- A 653 (Coating Designation G-185 for Hot-Dip connector
and sheet products). Electroplated galvanized fastener and metal products are typically not accepted by the
building codes for use in exterior applications, regardless of the type of wood used.
Stainless Steel - Stainless steel fasteners and connectors are required for Permanent Wood Foundations below
grade and are recommended for use with treated wood in other severe exterior applications such as swimming
pools, salt water exposure, etc. Type 304 and 316 are the recommended grades to use.
- Other fasteners and hardware as recommended by the manufacturer
There may be additional products (other than stainless steel or hot-dip galvanized) which are suitable for use
with NatureWood CA Wood Product. Please consult with the individual fastener or hardware manufacturer for
recommendations for use of their products with NatureWood CA Wood Product.
- Aluminum should not be used in direct contact with NatureWood CA Wood Product
Spacer materials or other physical barriers are recommended to prevent direct contact of NatureWood CA Wood
Product and aluminum products. When using NatureWood CA Wood Product in close proximity to aluminum
products, such as aluminum siding, ashing, furniture and door and window frames, a 1/4” minimum space
must be allowed for between the NatureWood CA Wood Product and the aluminum products. Polyethylene or
nylon spacers can be used to maintain the 1/4” spacing. Another option is to use a polyethylene barrier, with
a minimum thickness of 10 mils, between the NatureWood CA Wood Product and the aluminum product to
prevent direct contact of the wood and the aluminum.
• Material should be used only as specied on the ink stamp and/or end tag attached to each piece; i.e., material
that has been treated for above ground applications should not be used in ground contact applications as this
can adversely affect the performance of the entire project. In addition, no treated materials that have been end
cut or trimmed should be used in ground contact applications. Above ground applications are above ground
uses where material is not in contact with soil, or placed on or over soil using a synthetic barrier or plastic
material, or is continually exposed to heavy vegetation, mulch products, ll dirt, or other conditions that
could simulate a ground contact exposure. Ground contact material can be used in either above ground or
ground contact applications. Ground contact applications are uses where material is used in contact with the
ground, fresh water, or other situations favorable to deterioration; above ground, but is difcult to maintain,
repair or replace and is critical to the performance and safety of the entire system/construction (e.g., joists
and beams for decks and fresh water docks; or above ground but may end up in ground contact or is subject
to hazards comparable to ground contact due to climate, articial or natural processes or construction.
Examples of ground contact general use applications include fence posts, deck posts, guardrail posts,
structural lumber, joists and beams for decks and freshwater docks, and timbers located in regions of low
natural potential for wood decay and insect attack. Material should also be used in accordance with state and
local building codes as some state and local authorities have policies requiring pressure treated wood product
used in “close proximity” to the ground to be treated for ground contact applications.
• When appearance permits, attach boards bark side up. As a general rule, attach boards bark side up (annual
rings arc upward) to reduce cupping; however, the best face should be placed up when a defect of the wood is
apparent. Fasten thin boards to thicker boards to maintain structural integrity.
• Drill pilot holes - Drill pilot holes especially when nailing or screwing near the edge or end of a board. Pilot
holes will help minimize splitting.
• Deck board spacing - Should the wood become wet during construction, butt deck boards together. As drying
occurs, some shrinkage can be expected. If the wood is dry, allowing for shrinkage is not necessary.
• Use an endcoat preservative - A brush on endcoat wood preservative should be applied at the time
of construction on all saw cuts and drill holes for NatureWood CA Wood Product (all wood species).
Recommended endcoat wood preservatives include copper naphthenate, oxine copper, or zinc naphthenate
products. Important: Follow the manufacturer’s directions for proper application.
• Apply a weather-resistant nish - Any exposed wood, pressure treated or not, should be protected from the
weather. Application of a quality clear water repellent or semi-transparent stain, which contains water
repellent, will help minimize the cycles of moisture take-up and loss the wood goes through outdoors. First,
determine if your NatureWood CA Wood Product has been pressure treated with a factory applied water
repellent by looking at the end tag. If not factory water repellent treated, thoroughly clean your project with
a deck cleaning product. Clear water repellent can be immediately applied to your deck or other project. If
you choose to use a semi-transparent stain which contains a water repellent, you need to rst check that your
project is surface dry. Either wait until the surface is dry or immediately apply clear water repellent and wait
approximately 8 weeks and then apply your chosen color of semi-transparent stain. If the NatureWood CA
Wood Product contains a factory water repellent, an oil based stain can be applied in 30 - 60 days and water
based stains can be applied after 6 months. Check that the wood is surface dry before applying stain. In all
instances follow the manufacturer’s directions when applying water repellents or semi-transparent stains
which may contain water repellent.
• Do not burn preserved wood.
• Wear a dust mask and goggles when cutting or sanding wood.
• Wear gloves when working with wood.
• Some preservative may migrate from the treated wood into soil/water or
may dislodge from the treated wood surface upon contact with skin. Wash
exposed skin areas thoroughly.
• All sawdust and construction debris should be cleaned up and disposed of
after construction.
• Wash work clothes separately from other household clothing before reuse.
• Preserved wood should not be used where it may come into direct or indirect
contact with drinking water, except for uses involving incidental contact
such as fresh water docks and bridges.
• Do not use preserved wood under circumstances where the preservative may
become a component of food, animal feed, or beehives.
• Do not use preserved wood as mulch.
• Only preserved wood that is visibly clean and free of surface residue should
be used.
• If the wood is to be used in an interior application and becomes wet during
construction, it should be allowed to dry before being covered or enclosed.
• Disposal Recommendations - Preserved wood may be disposed of in landlls
or burned in commercial or industrial incinerators or boilers in accordance
with federal, state, and local regulations.
• If you desire to apply a paint, stain, clear water repellent, or other
nish to your preservative treated wood, we recommend following the
manufacturer’s instructions and label of the nishing product. Before you
start, we recommend you apply the nishing product to a small exposed test
area before completing the entire project to insure it provides the intended
result before proceeding.
• Projects should be designed and installed in accordance with federal, state,
and local building codes and ordinances governing construction in your
area and in accordance with the National Design Specications (NDS) and
the Wood Handbook.
• Mold growth can and does occur on the surface of many products, including
untreated and treated wood, during prolonged surface exposure to excessive
moisture conditions. To remove mold from the treated wood surface, wood
should be allowed to dry. Typically, mild soap and water can be used to
remove remaining surface mold. For more information visit www.epa.gov.
IMPORTANT INFORMATION