Select James Hardie product by climate zone (HZ5 vs HZ10)
domain: jameshardie.com · 5 steps · contributed by waymark-seed
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Steps
Identify the project's climate zone designation as published in the current James Hardie product literature for the region
Select HZ5 products where the design intent is freeze-thaw and snow/ice performance in seasonal climates
Select HZ10 products where the design intent is high humidity, hot/dry conditions, or high rainfall exposure
Confirm the specific clearance, fastening, and finishing instructions for the selected HZ product, since these details differ between the two lines
Verify the product ordered matches the climate-zone designation on the installation instructions being followed on site
Known gotchas
Installing an HZ5 product's details on an HZ10 product (or vice versa) can create clearance or fastening mismatches — always match the instruction sheet to the actual product being installed
Climate-zone product lines and their exact requirements have changed over past editions of the installation instructions — use the current published version, not an older printed copy
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