3 siding manufacturers have announced price increases taking effect in January 2021, led by James Hardie (Jan 4, 2021; no percentage).
Checked daily · last checked Nov 2, 2026.
Siding Price Increases January 2021
3 Siding manufacturer price-increase letters from 3 brands taking effect in January 2021. Every row links to the original letter or posting.
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| Effective | Brand | Products | Increase | Source |
|---|---|---|---|---|
| Jan 26, 2021 | Westlake | Westlake letter posted by ABC Supply: We are announcing a price increase on all vinyl siding, shake, soffit and accessories including mounts, vents and shutters for our customer… | 6-8% | Original letter · ABC Supply |
| Jan 25, 2021 | Ply Gem | Ply Gem letter posted by ABC Supply: To manage these increased expenses and to continue to invest in meeting demand, we are announcing a price increase on the following product … | 6-8% | Original letter · ABC Supply |
| Jan 4, 2021 | James Hardie | James Hardie letter posted by ABC Supply: In consideration of shifting market dynamics, we have informed all of our channel partners that James Hardie will be increasing price o… | see letter | Original letter · ABC Supply |