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Bifolding Doors: Which Type of Threshold should I Choose?


Bifold doors are becoming more and more popular, not only because of the wow-factor they add to a home, but because they flood a room with natural light while providing great views. If you have decided to buy some bifolding doors for your property, there are a few things to consider to ensure you are satisfied with the final product.

One of the main factors to consider is your threshold choice. A threshold is the part that forms the bottom of a doorway and is crossed when entering and exiting a house or room. Its purpose is to make your door weatherproof, protecting the inside of your property from outside elements such as water or wind.

A bifolding door’s threshold is a factor that affects both its functionality and its appearance. That is why, here at UK Doors Online we offer two main threshold types (standard and low) with flexibility of variations to match your taste and needs.


Standard threshold (55mm)

Our standard or weathered threshold provides the utmost protection whilst still looking sleek and complimenting your overall bifold aesthetic and existing exterior. The standard threshold acts as a full weather break keeping your home dry and warm regardless of outside elements. Hence, for external bifolding doors, the standard 55mm is recommended, especially here in the UK where we have 195 rainy days a year.


Low threshold (20mm)

Our low threshold does not offer as much weather protection but does create a seamless look. Lower thresholds present less of a trip hazard than higher thresholds so are more suited for those with mobility issues or small children. While the design may be more striking, we do not recommend this for external bifolds unless in sheltered areas.


Low threshold with rebate (40mm)

If you want a lower threshold than standard, we have the option of attaching a 20mm rebate to our low threshold making it only slightly higher but weather-rated.


As a general rule of thumb, when choosing your threshold there will be a trade-off between weather performance and ease of passage. However, with our sleek design and Alutech Systems BF73 thresholds, this trade-off is marginal.

To design your own tailor-made bifold fit with the right threshold use our online door designer. Alternatively, contact us at sales@ukdoorsonline.co.uk or give one of our friendly sales members a call on 01924 929 600 for more information.


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