The cost of a 4 metre bifold door set depends mainly on the frame material, the number of leaves, the glazing specification and the structural work needed, so a firm figure needs a survey. A fitted quote should itemise all of these rather than give one headline number.
What drives the price of 4 metre bifold doors?
- Frame material: aluminium costs more than PVCu.
- Number of leaves, usually four or five across 4 m, each with its own hardware.
- Glazing: higher-performance or laminated glass adds cost.
- Finish: standard colours are cheaper than special RAL or dual-colour options.
- Threshold and drainage detail, and whether the system is top-hung or bottom-rolling.
What else affects the total?
A 4 m span is heavy, so the opening often needs a correctly rated lintel and propping while it is fitted. Widening an existing opening also needs Building Regulations approval, and making good inside and out is a separate cost.
What should a bifold door quote include?
- Supply and fitting of the doors, with the glass specification stated.
- Lintel and structural work, or a clear note that it is excluded.
- Removal of the old doors, making good and finishing.
- Guarantee details, and whether a survey is needed first.
Phoenix Windows surveys the opening first, then quotes for bifold doors in writing.
Thinking about new doors? We fit across Nuneaton, Bedworth, Hinckley, Tamworth and Rugby, and every installation comes with an insurance-backed 10-year guarantee. Call 02476 350 330, or request a quote.