Western Wood Preservers Institute

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1 Western Wood Preservers Institute Represents preservative treated wood producers, chemical manufacturers and others serving the industry throughout western North America Mission Increase awareness of the proper use of treated wood products by providing information to: Homeowners Builders Architects, Specifiers Bldg. Material Dealers Code Officials Ports and Marinas Western Wood Preservers Institute

2 Pressure treated wood in building 90%+ homes built with wood Less than 6% of wood used is pressure treated Western Wood Preservers Institute

3 Problem Wood durability is threatened by: Carpenter ants Wood boring beetles Termites Decay fungi, rot Fire Western Wood Preservers Institute

4 Wood destroying insects Wood Boring Beetles Carpenter Ants Formosan Termite Western Wood Preservers Institute

5 Wood destroying insects Wood Boring Beetles Carpenter Ants Formosan Termite Western Wood Preservers Institute

6 Termite infestation probability Figure R301.2(6) International Residential Code Western Wood Preservers Institute

7 Hidden dangers of termites, decay, rot Western Wood Preservers Institute

8 More moisture, more potential problems Western Wood Preservers Institute

9 Pressure Preserving Solution Treat outer shell of wood with preservatives Extends service life of wood to decades Maintains reliable physical, mechanical properties Readily available, safe to work with, cost effective Western Wood Preservers Institute

10 Waterborne Preservatives AWPA approved ACQ Alkaline Copper Quat CA-A Copper Azole SBX Inorganic Boron PTI and EL 2 Carbon-based preservatives ICC-ES approved MCA Micronized Copper Azole 11

11 Coatings Solution Coat wood with preservatives Claims are questionable Western Wood Preservers Institute

12 Coatings Others TimberSil BluWood (USA) ICC-ES approved EcoRed Shield 13

13 Use Category 1 UC1 Interior construction Not in contact with ground or foundations Protected from weather Protected from interior sources of water Insect hazard only 14

14 Use Category 2 UC2 Interior construction Not in contact with ground or foundations Protected from weather Subject to dampness and occasional sources of water Decay fungi and insect hazard 15

15 Use Category 3 UC3 Above ground, exposed to weather UC3A: Coated and rapid water runoff UC3B: Uncoated or poor water runoff Decay fungi and insect hazard 16

16 Treated Wood and Building Codes

17 International Building Code reference Section Decay and Termite Protection 18

18 IBC Wood used above ground Section Wood supported by exterior foundation walls Wood framing members that rest on concrete or masonry exterior foundation walls & are less than 8 from exposed ground. 19

19 IBC Wood used above ground Section Sills and sleepers All foundation plates or sills and sleepers on a concrete or masonry slab, which is in direct contact with earth, and sill which rest on concrete or masonry foundations. 20

20 IBC Wood in contact with ground, water Section Wood structural members Wood structural members supporting moisturepermeable floors or roofs that are exposed to weather such as concrete or masonry slabs. 21

21 IBC Safety from wood-damaging insects Section Termite protection In geographical areas where hazard of termite damage is known to be very heavy, wood floor framing in locations specified in Section and exposed framing of exterior decks or balconies. 22

22 Fire Retardant Properties

23 IBC Fire retardant treated wood Section Any wood product impregnated with chemicals by a pressure process or other means during manufacture with a flame spread index of 25 or less 24

24 Treated Wood Quality Marks, Fasteners

25 Product quality mark Section All preservative-treated wood shall bear the quality mark of an inspection agency which has been accredited by the American Lumber Standards Committee and complies with the requirements of the ALSC Treated Wood Program or equivalent. 26

26 Product quality mark required information Proper exposure condition AWPA standard Preservative used Minimum retention Trademark of ALSC agency Identification of the treating plant 27

27 Performance of Selected Wood- Protection- Coated Lumber Products in Hilo, Hawaii: One Year Report

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40 Any time. Any where. Treated Wood app Free download available for ios, Android and Windows Key information needed to understand, properly specify treated wood Search Western Wood Preservers in online stores 41

41 Questions? Western Wood Preservers Institute