Choosing the right bifold doors starts with understanding your opening and how you want to use it. The correct size balances smooth operation, natural light, and a clean look that suits your room.
This guide walks through standard dimensions, panel options, frame depth, and installation details so you can specify bifold doors with confidence.
| Typical Width Range | Typical Height Range | Panel Configuration | Recommended Use |
|---|---|---|---|
| 600–900 mm | 1,800–2,100 mm | 2 panels | Small bedroom or closet |
| 900–1,200 mm | 1,900–2,100 mm | 3 panels | Standard bedroom or living room |
| 1,200–1,800 mm | 2,000–2,400 mm | 4–6 panels | Open-plan living or wide staircase |
| Custom sizes available | Up to 2,700 mm | Custom layouts | Large openings or design briefs |
Measuring Your Opening Accurately
Precise measurements prevent returns and ensure a weather-tight seal. Width is measured at the top, middle, and bottom, using the smallest clear opening. Height is measured from the floor or threshold to the desired finished height at several points.
For interior use, subtract 10–15 mm from both width and height to allow for clearance. For external applications, follow the manufacturer’s tolerance table and plan for brick reveals or structural adjustments.
Standard Bifold Door Sizes
Standard sizes cover most residential projects and are cost-effective due to prefabrication. Door leaf widths commonly range from 600 mm to 1,200 mm, with heights aligned to typical floor-to-ceiling dimensions.
Heavier glass or aluminium frames may require narrower leaves to maintain smooth operation. Always check the specific guidance from the supplier, as limits vary by hardware design.
Frame Depth and Hardware Compatibility
Frame depth affects which hardware system your doors can use and how the doors sit in the reveal. Standard depth is around 100 mm, but slimmer frames at 80–90 mm are common for modern interiors.
Deeper frames may accommodate larger rollers and weather seals for external doors. Confirm compatibility with the bifold hardware early to avoid redesigns during installation.
Materials and Finishes to Consider
Timber frames offer warmth and can be tailored in size, while aluminium is slim, strong, and low maintenance. UPVC is a budget-friendly option with decent thermal performance for standard sizes.
Finish choices, from painted surfaces to anodized or woodgrain effects, should match the scale of the doors and the surrounding architecture to maintain visual balance.
Final Recommendations
- Measure the clear opening at three points and use the smallest value for sizing.
- Match panel count and door width to the space and hardware manufacturer limits.
- Choose frame depth and material based on internal versus external placement.
- Verify compatibility between glass thickness, hardware type, and frame design.
- Confirm load, weather sealing, and fire ratings for the intended location before ordering.
FAQ
Reader questions
Will existing frames and tracks support larger bifold doors?
Larger doors place higher demands on the hardware and frame fixings. You may need upgraded hinges, thicker thresholds, and additional wall or head reinforcement to prevent sagging and ensure long-term smooth operation.
How narrow can bifold doors be without affecting performance? Doors narrower than about 500 mm can work in small openings but may not align well with standard hardware spacing. Narrower panels often require custom glazing or thinner frames, which can reduce thermal performance and durability. Can bifold doors be oversized for a dramatic glass wall?
Yes, but oversized doors need heavy-duty hardware, reinforced frames, and careful installation to manage weight and wind load. Structural calculations and professional installation are strongly recommended for very large configurations.
What height is ideal for bifold doors in a laundry or pantry?
For functional access, match the door height to adjacent doors, typically 1,800–2,000 mm. If the opening extends to a higher ceiling, you can use full-height doors with fixed transom sections above to maintain proportion and light without compromising usability.