What Makes Pressure Treated Woods Fail vs Last

Summary by Krater

The host examines various pressure-treated lumber systems, explaining why certain types fail and discussing preservation techniques, hanger selection, and fastener requirements for outdoor construction.

From the video

Answers: Why do pressure-treated wood and hangers fail, and what type of treated lumber should I use?

• pressure treated lumber failure
• wood preservation
• hem fir lumber
• Douglas fir lumber
• Simpson hangers
• ZMAX coating
• hot-dipped zinc fasteners

What it concludes

• Pressure-treated lumber not rated for ground contact will rot quickly when set in concrete due to wet-dry cycles.
• Douglas fir absorbs pressure treatment less than hemlock-fir species.
• Hangers used in wet-dry environments with pressure-treated wood require ZMAX coating and hot-dipped zinc or stainless fasteners to resist corrosion.
• Railroad ties and power poles eventually rot from the inside out when checks and cracks allow moisture and fungi to penetrate.