# C24 Regularised Treated Timber

47mm x 200mm C24 Regularised Treated Timber (8" x 2") is our largest-section C24 timber, built for the heaviest-duty structural work — long-span floor and roof joists, large stud walls, and load-bearing applications where a smaller section simply won't carry the span.

-   Planed all around (PAR) with eased edges for safer handling on site
-   Kiln-dried and regularised to a consistent 47mm x 200mm section, reducing on-site cutting and wastage
-   Strength graded to C24, giving a higher stress rating than standard C16 timber — useful when a span calculation demands the extra margin
-   Pressure treated for protection against fungal decay and insect attack

Because the deeper 200mm section carries more load over a longer span than our 150mm or 175mm timber, it's commonly specified for larger domestic extensions, longer floor joist runs, and heavier roof structures. Available in lengths from 3.0m up to 6.0m.

Check your span tables or with a structural engineer before ordering to confirm 200mm is the right depth for your specific joist centres and loading.

## Details

- **Price:** 14.5 GBP - 29.38 GBP
- **Vendor:** nextdayinsulation
- **Type:** Timber
- **Tags:** Timber

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| 3.0m | 14.50 GBP | In stock |
| 3.6m | 17.28 GBP | In stock |
| 4.2m | 20.16 GBP | In stock |
| 4.8m | 23.04 GBP | In stock |
| 6.0m | 29.38 GBP | In stock |

## Images

- 47mm x 200mm C24 regularised treated timber plank for structural construction
- Stack of 47mm x 200mm C24 regularised treated timber boards

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> Source: [Next Day Insulation](https://nextdayinsulations.com/products/c24-regularised-treated-timber)
> Updated: 2026-08-21