Choosing the right timber is essential when building a stud wall. Whether you’re dividing a room, creating an ensuite or changing your home’s layout, the correct timber helps create a straight, stable frame and a quality finish.
For most internal partitions, kiln-dried CLS timber is a practical choice. The size and strength grade required will depend on the wall’s height, construction and intended use.
Understanding the Framework
A stud wall is a timber-framed partition, typically finished with plasterboard. Most domestic partition walls are non-load-bearing.
The main components are:
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Head plate: Horizontal timber fixed at the top of the wall.
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Sole plate: Timber running along the floor at the base of the frame.
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Studs: Vertical timbers supporting the wall lining and providing space for insulation and services.
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Noggins: Horizontal sections between studs that add rigidity and provide fixing points.
For lining an existing wall, timber battens or a separate lining frame may be more suitable.
Why Choose CLS Timber?
CLS (Canadian Lumber Standard) timber has a smooth, planed finish and rounded edges, making it easy to handle and work with.
Choose straight, consistent lengths wherever possible. Bowed or twisted timber can make it difficult to create a level frame and achieve a flat plasterboard finish.
CLS is available in grades including C16 and C24. These indicate structural properties and do not mean the timber is treated. Always use the grade specified for your particular application.
What Size Timber Do You Need?
Common CLS sizes include 63 × 38mm and 89 × 38mm. Nominal sizes can differ, so always check the actual dimensions before ordering.
The correct size depends on:
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Wall height and stud spacing
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Plasterboard type and thickness
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Insulation and service requirements
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Fire and sound insulation requirements
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Doors, fixtures and other loads
Always follow the specification for your chosen wall system.
Planning for Doors and Heavy Fittings
Plan the position of doors, radiators, cabinets and other fittings before closing the wall. Additional studs, noggins or suitable backing may be required to provide adequate support.
For bathrooms, kitchens and tiled areas, make sure the frame and lining system are suitable for the expected moisture and loads.
Does Stud Wall Timber Need Treatment?
Untreated timber is commonly used for dry internal partitions. Kiln drying reduces moisture content and helps minimise movement, but it does not make timber waterproof.
Where moisture exposure is possible, use an appropriate wall lining and waterproofing system. Existing damp should always be addressed before covering the wall.
Get the Right Timber for Your Project
Measure your space and confirm the wall specification before ordering. Choosing the correct timber, boards and fixings from the outset can make installation easier and prevent costly changes.
For timber and studwork requirements, contact Johnsons Timber Supplies on 0121 706 0404 or email sales@johnsonstimber.co.uk.