Untreated Carcassing Timber | Sawn Structural Timber for Internal Construction

Untreated carcassing timber is the standard choice for internal structural applications where the timber will remain dry, protected, and well-ventilated once built in. It's widely used in floor joisting, internal stud walling, roof construction, and general framing — anywhere the timber is enclosed within the building envelope and not exposed to moisture or the elements.

Sawn to the regularised profiles specified across UK construction, our carcassing timber is available in the sizes and lengths used daily by builders, joiners, and contractors. Whether you need 47x100, 47x125, or 47x150 sections, you'll find the right dimensions to suit your project.

Untreated carcassing is typically graded to C16 or C24 — the two most common structural grades used on UK building sites — making it suitable for a wide range of residential and commercial construction projects. Where preservative treatment is required for external or semi-exposed applications, see our treated carcassing range.

At Nicks Timber, we've been supplying quality structural timber to the trade since 1856. That long experience means you get consistently graded stock, reliable availability, and the kind of straightforward service that trade customers and self-builders have depended on for generations. Our carcassing timber is competitively priced for both single-project buyers and trade accounts with ongoing requirements.

Order online for delivery, or get in touch to discuss trade pricing and volume orders.