4×2″ C24 Treated Timber Rough Sawn (100×44 mm) – 4.2 m
€15.96
In stock
| Quantity | Discount (%) | Price |
|---|---|---|
| 1 - 39 | — | €15.96 |
| 40 - 80 | 4% | €15.32 |
| 81+ | 8% | €14.68 |
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C24 strength graded structural timber, certified for load bearing applications
Pressure treated for use in damp, external and sheltered ground contact locations
Kiln dried below 22% moisture content before treatment for stability on site
Cut ends and drilled holes must be treated on site with an end grain preservative
Needs galvanised or stainless fixings, plain steel corrodes against the preservative
Product specification
- Length
- 4200 mm
- Width
- 100 mm
- Thickness
- 44 mm
- Material
- Timber
- Wood Type
- Softwood
Treated C24 Timber
4×2 treated whitewood, 100 by 44 mm, is the framing section for work that will meet damp: sole plates on masonry, external stud walls, sub-floor framing, and carcassing in garages, plant rooms and unheated spaces. Strength-graded to C24 and kiln-dried below 22% moisture content before it goes into the treatment vessel, it carries exactly the same certification as our sawn range with preservative protection on top. Lengths run from 4.2 m to 5.4 m. Stocked in our warehouse for delivery across Ireland.
Why treated C24?
The grading and the treatment are two separate things, and you want both. C24 tells you what the timber will carry; the treatment tells you how long it will last where it is going. Because the preservative is drawn in under vacuum pressure rather than brushed on, protection runs into the section instead of sitting on the surface, so a scuff on site does not expose bare timber. The only genuinely vulnerable part of a treated board is where you cut it.
Installation guidance
Treat every cut end and drilled hole with a compatible end grain preservative before you fix it, because a saw cut exposes untreated timber at the centre of the section. Use galvanised or stainless steel structural fixings rated for the load and the location: the copper based preservatives used on treated timber will corrode plain steel over time. Check span tables before specifying, and let freshly treated timber dry before you close board over it.
Finishing & maintenance
Pressure treatment protects against rot and insect attack, not against weathering. Timber left fully exposed will still grey and check, so apply an exterior coating where appearance matters and let the board dry out first. The green tint fades through the first months outdoors. Re-treat any damage that reaches bare timber, along with every cut end. For dry internal framing there is no reason to pay for treatment: the same section is available untreated as 4×2 C24 timber rough sawn. See every stud, joist and beam size in our C24 treated timber range. To compare sawn and treated sizes side by side, see our construction timber page.