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BROfix hidden decking fasteners let you lay a perfectly clean timber deck with no visible screws on the board face. Each clip slots into the groove of your decking board and is fixed to the joist below with a single screw, which is then covered by the next board. The result is a contemporary, unbroken deck surface that looks as good in five years as it does on day one.
Engineered from high-performance PA-6 polyamide, BROfix clips are built for year-round outdoor use in the UK. They have been tested through temperature cycles from -50°C to +80°C at 0–95% relative humidity — well beyond anything the British climate will throw at them.
| Feature | Detail |
|---|---|
| Material | Polyamide PA-6 (recyclable engineering nylon) |
| Dimensions | 14.3 × 19.7 × 30 mm |
| Coverage rate | 2.2 clips per linear metre |
| Pack size | 300 pieces |
| Gap maintained | 6 mm (automatic — no spacers needed) |
| Temperature range | -50°C to +80°C |
| Humidity range | 0–95% RH |
| UV resistance | High |
| Recyclable | Yes |
| Compatible timber | ThermoWood grooved decking boards |
| Recommended screw | Stainless Steel A2 — 4.2 × 42 mm, Torx 20 (sold separately) |
Face-fixing timber decking is quick, but it leaves screw heads exposed on every board — and over time those fixings rust, stain, and become tripping hazards as board edges lift. BROfix solves all of that. By fixing through the groove, the clip is never visible, the board is held flat along its full length, and the automatic 6 mm gap allows the timber to expand and contract seasonally without cupping or buckling.
BROfix also reduces the total number of screws required by approximately half compared to conventional face-fixing. Fewer fixings means faster installation and a lower cost per square metre overall.
BROfix fasteners are designed for use with our ThermoWood secret fix decking boards. All three boards in the range have an edge groove that accepts the BROfix clip, with no visible fixings on the deck face. Choose the profile that suits your project:
| Board | Face finish | Size |
|---|---|---|
| ThermoWood Secret Fix Decking Grooved 26x117mm | Grooved face — textured profile | 26 x 117 mm |
| ThermoWood Secret Fix Decking Smooth 26x140mm | Smooth face — clean, minimal finish | 26 x 140 mm |
| ThermoWood Secret Fix Decking Brushed 26x140mm | Wire-brushed face — raised grain texture | 26 x 140 mm |
Not sure which board suits your project? Contact us and we will advise.
Download our full step-by-step installation guide for BROfix hidden decking fasteners as a PDF:
BROfix Hidden Decking Fasteners — Installation Guide (PDF)
The guide covers subframe preparation, clip spacing, screw specification, butt joint details, and finishing advice for ThermoWood decking.
BROfix clips are used at a rate of 2.2 per linear metre of board. To calculate your requirement: divide your deck area (m²) by your board face width (in metres) to get total linear metres, then multiply by 2.2. Always add a 10% wastage allowance. One pack of 300 clips covers approximately 136 linear metres of board run.
Not sure on quantities? Get in touch and we will work it out for you.
BROfix fasteners are designed for use with our ThermoWood secret fix decking boards. We stock three compatible boards: Grooved 26x117mm, Smooth 26x140mm, and Brushed 26x140mm. All have an edge groove that accepts the BROfix clip.
BROfix clips are used at 2.2 pieces per linear metre of board run. The total linear metres depends on your board width and deck area. Add a 10% wastage allowance. One 300-piece pack covers approximately 136 linear metres.
Use stainless steel A2 screws — 4.2 × 42 mm with a Torx 20 head. Avoid zinc-plated or galvanised screws when fixing into ThermoWood decking as they can cause staining on the board surface.
Yes. BROfix clips are manufactured from PA-6 polyamide and tested in a temperature shock chamber from -50°C to +80°C at 0–95% relative humidity — well suited to year-round UK outdoor conditions.
The full installation guide is available as a free PDF download: BROfix Installation Guide (PDF).
Ready to order? Add BROfix to your basket above, or contact our team for quantity advice and a full decking quote including boards, clips, and fixings.
Thermowood, Nordic Spruce, Siberian Larch, Charred TImber (Shou Sugi Ban Technique)