
The Story
Treated pine square decking spindles, 41mm x 41mm x 895mm, are the go-to choice for building external balustrades on raised decks, steps, and balconies. Pressure treated for long-term rot resistance, each spindle delivers a clean, straight-lined profile at a trade-friendly price.
Specifications
| Material | Pine (slow-grown softwood) |
|---|---|
| Treatment | Pressure treated (tanalised) for outdoor use |
| Nominal Size | 41mm x 41mm x 895mm |
| Profile | Square / straight |
| Finish | Sawn / rough |
| Use Class | UC3 (above ground, exposed to weathering) |
What it's used for
- Infill spindles between handrail and base rail on raised timber decks
- Balustrade panels on garden steps and external staircases
- Side balustrades on decked balconies and elevated platforms
- Decorative upright infills within fence and gate structures where a square profile is preferred
Fitting and handling
Store spindles flat and off the ground, under cover, until you are ready to fix them. Although pressure treated, the cut ends of each spindle should be brushed with an end-grain preservative before installation to maintain the treatment's integrity. Fix using stainless steel or hot-dipped galvanised screws to prevent corrosion staining on the timber, and space spindles to meet the 100mm maximum gap requirement for balustrades where children may be present.
FAQ
What gap should I leave between decking spindles?
Current UK building guidance recommends a maximum 100mm gap between spindles in any balustrade where children under five could be present. With a 41mm wide spindle, plan your spacing carefully along the full run before fixing to keep gaps consistent.
Can these spindles be painted or stained?
Yes. Once the treatment has fully dried, usually two to four weeks after delivery, you can apply an exterior wood stain, paint, or decking oil to match your existing decking boards or handrail. Lightly sanding the surface first will help the finish adhere evenly.
Are these spindles suitable for ground contact?
No. These spindles are rated Use Class 3, meaning they are suitable for above-ground external use exposed to weather. They should not be set directly into soil or concrete. For posts that require ground contact, a Use Class 4 treated post is the correct choice.
Browse the full decking collection at Nottage Timber Merchants for matching handrails, base rails, and decking boards. We supply trade and DIY customers across Bridgend and South Wales, with collection available from our yard in Nottage.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Description
Treated pine square decking spindles, 41mm x 41mm x 895mm, are the go-to choice for building external balustrades on raised decks, steps, and balconies. Pressure treated for long-term rot resistance, each spindle delivers a clean, straight-lined profile at a trade-friendly price.
Specifications
| Material | Pine (slow-grown softwood) |
|---|---|
| Treatment | Pressure treated (tanalised) for outdoor use |
| Nominal Size | 41mm x 41mm x 895mm |
| Profile | Square / straight |
| Finish | Sawn / rough |
| Use Class | UC3 (above ground, exposed to weathering) |
What it's used for
- Infill spindles between handrail and base rail on raised timber decks
- Balustrade panels on garden steps and external staircases
- Side balustrades on decked balconies and elevated platforms
- Decorative upright infills within fence and gate structures where a square profile is preferred
Fitting and handling
Store spindles flat and off the ground, under cover, until you are ready to fix them. Although pressure treated, the cut ends of each spindle should be brushed with an end-grain preservative before installation to maintain the treatment's integrity. Fix using stainless steel or hot-dipped galvanised screws to prevent corrosion staining on the timber, and space spindles to meet the 100mm maximum gap requirement for balustrades where children may be present.
FAQ
What gap should I leave between decking spindles?
Current UK building guidance recommends a maximum 100mm gap between spindles in any balustrade where children under five could be present. With a 41mm wide spindle, plan your spacing carefully along the full run before fixing to keep gaps consistent.
Can these spindles be painted or stained?
Yes. Once the treatment has fully dried, usually two to four weeks after delivery, you can apply an exterior wood stain, paint, or decking oil to match your existing decking boards or handrail. Lightly sanding the surface first will help the finish adhere evenly.
Are these spindles suitable for ground contact?
No. These spindles are rated Use Class 3, meaning they are suitable for above-ground external use exposed to weather. They should not be set directly into soil or concrete. For posts that require ground contact, a Use Class 4 treated post is the correct choice.
Browse the full decking collection at Nottage Timber Merchants for matching handrails, base rails, and decking boards. We supply trade and DIY customers across Bridgend and South Wales, with collection available from our yard in Nottage.




