2 siding manufacturers have announced 3 price increases taking effect in May 2021, led by CertainTeed (up to 10%, May 3, 2021).
Checked daily · last checked Nov 2, 2026.
Siding Price Increases May 2021
3 Siding manufacturer price-increase letters from 2 brands taking effect in May 2021. Every row links to the original letter or posting.
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| Effective | Brand | Products | Increase | Source |
|---|---|---|---|---|
| May 17, 2021 | Norandex | Norandex letter posted by ABC Supply: Therefore, we will be implementing a 5% price increase on all orders effective May 17, 2021. | 5% | Original letter · ABC Supply |
| May 3, 2021 | CertainTeed | CertainTeed letter posted by ABC Supply: Prices will increase up to 10%, effective with orders received beginning May 3, 2021, for the product categories listed below: CertainTe… | up to 10% | Original letter · ABC Supply |
| May 3, 2021 | Norandex | Norandex letter posted by ABC Supply: Prices will increase between 8-10%, effective with orders received beginning May 3, 2021, for the product categories listed below: • Norand… | 8-10% | Original letter · ABC Supply |