Untreated Carcassing Timber

Choosing Untreated Carcassing Timber

Carcassing timber is used for construction and framing applications such as wall studs, floor joists and roof members. Choose untreated timber only where it meets the project specification and the conditions in which it will be used.

Strength Grade and Structural Use

Check the strength grade stated in the individual product listing against your timber schedule. The required grade and section size depend on the design, loads, spans and support arrangements.

Strength grading does not provide protection against decay. Do not substitute a different grade, smaller section or untreated timber for specified treated timber without approval from the person responsible for the design.

Timber Sizes and Lengths

Check whether the dimensions shown are nominal or finished sizes. Machined timber can have a smaller finished section than its nominal description, which matters when matching existing timber, connectors or a structural specification.

Plan your cutting list around the available lengths, allowing for saw cuts and waste. Confirm finished dimensions where a precise fit is required.

When Is Untreated Timber Suitable?

Untreated carcassing may be suitable for protected internal applications where the design permits its use. Suitability depends on moisture conditions, decay or insect risks and the requirements of the project, not simply whether the timber is indoors.

Do not assume untreated carcassing is suitable for decking subframes, ground contact or exposed outdoor structures. Where preservative treatment is required, choose timber supplied to the appropriate treatment specification.

Painting or applying a surface preservative does not automatically make untreated timber equivalent to timber supplied with a specified industrial preservative treatment.

Planning Your Timber Order

Before ordering, have the following details ready:

• The specified timber strength grade.
• The required finished section sizes.
• The lengths and number of pieces needed.
• A cutting list, with an allowance for cuts and waste.
• Confirmation that untreated timber is permitted for the application.
• Your delivery postcode and any access restrictions.

For load-bearing work, have timber sizes, spans, spacing and connections confirmed by a suitably qualified designer before buying materials. Our team can help with product selection and quantities against your specification.

Storage and Fixings

Keep timber off the ground and protected from rain during storage, with ventilation around the stack. Avoid trapping moisture beneath tightly wrapped covers.

Choose connectors and fixings to match the structural design and exposure conditions. Browse our joist hangers and brackets, and follow the connector manufacturer's requirements for compatible nails or screws.

Help With Your Materials Order

Send us your timber schedule or cutting list, including section sizes, lengths, quantities and strength grade. Let us know whether you need collection or delivery.

Call 01452 300159 or email sales@nickstimber.co.uk to discuss availability and your materials order.

Collection and Delivery

Collect from Nick's Timber, Canada Wharf, Bristol Road, Gloucester GL1 5TE, or arrange delivery to a supported postcode.

Check our delivery areas, charges and estimated times. Contact us to confirm stock and collection availability before travelling.