Fabricated at our factory in Southwest London using the Alunet BF73 Bifolding Door System, our bifold doors boast market-leading sightlines of 107mm, high thermal efficiency with U-values as low as 1.1 W/m²K, a PAS:24 security rating and features typical of premium brands — all without the premium price tag.
Widely considered the most cost-effective bifold system without compromising quality or thermal efficiency, the Alunet BF73 system delivers outstanding value. With our 2-week lead time, we offer market-leading turnaround times thanks to our efficient, experienced manufacturing process.
| System | Alunet BF73 |
| Frame Width | 73mm |
| Frame Depth | 81mm (inside to outside) |
| Mullion Sightline | 120mm or 133mm |
| Max Height | 3,000mm |
| Max Overall Width | 16.8m |
| Thermal Performance | Down to 1.1 W/m²K |
| Weight per Leaf | Up to 120kg |
| Glazing | 28mm, 32mm, 35mm, 44mm — double & triple glazed |
| Security | PAS:24 rated |
| Colour | Any RAL — powder coated in-house |
| Lead Time | 2 weeks |
Our 107mm mullion sightlines are among the slimmest available, maximising your glass area and views.
U-values as low as 1.4 W/m²K keep your home warm in winter and cool in summer, cutting energy bills.
Rated to PAS:24 as standard, providing enhanced security against forced entry — no upgrades needed.
Thanks to our efficient in-house manufacturing process, we deliver in just 2 weeks — faster than most competitors.
Download our order form, fill in your exact opening dimensions and configuration requirements.
Select your RAL colour, glazing type, handle style and any additional hardware options.
Your doors are precision-fabricated at our Southwest London factory using the Alunet BF73 system.
We deliver nationwide, typically within 2 weeks of confirmed order.
Our bi-fold doors can reach a maximum height of 3,000mm and an overall width of 16.8m (using up to 14 panels). Single panels can be up to 1,200mm wide.
Yes — our bi-fold doors can be configured to open either inward or outward depending on your space requirements. They also fold left or right.
Yes. The Alunet BF73 system features a polyamide thermal break, delivering U-values down to 1.4 W/m²K with appropriate glazing.
We can powder coat in any RAL colour at our in-house facility. We can also match custom colours or supply in dual-colour finish (different inside and outside).
Our team is on hand to help you specify the right product and provide a fast, competitive quote.
