With UK searches for 'indoor outdoor living' rising year-on-year, homeowners are increasingly looking for ways to create seamless connections between their homes and gardens.
Flush track glazed doors have become a popular solution, offering minimal sightlines and an uninterrupted transition between inside and outside. While flush track systems are now common in contemporary homes, they remain a feature that requires careful planning and installation.
According to Edward Stobart, Technical Sales Manager at IDSystems, flush tracks now account for more than 70% of the company’s installations, particularly on larger sliding and bifold door projects. However, mistakes during design or installation can be costly and difficult to rectify.
What type of doors can have a flush track?
Not all door systems are suited to a completely flush threshold, so understanding which ones work best is crucial. Knowing which system can be installed with a flush track that still provides effective protection from wind and rain is key to the success of your project.
Sliding and slide & turn doors
Sliding and slide & turn systems can achieve a true flush finish with no upstand while still maintaining excellent weather protection.
Sliding doors from IDSystems use stainless running carriages recessed into the track, while slide & turn systems use custom-designed seals that flip into place to create a weathertight barrier when closed.
These systems are ideal for homeowners seeking a completely seamless transition between inside and out.
Bifold and French doors
Bifold doors and French doors work differently because the panels close against the threshold. Although fully flush options exist, they typically rely only on brush seals, which provide limited protection against rain and draughts.
For external applications, IDSystems recommends low-threshold solutions rather than completely flush tracks. Its bifold systems feature a discreet 14mm upstand that creates an effective weather seal while remaining compliant with Building Regulations Part M for wheelchair access. Visually, the result still appears almost flush.
Common problems when installing a flush track system
There are a number of reasons that you can be having problems with your flush track installation, as Edward Stobart details below:
1. The track isn't flush
The most frequent issue with flush track installations is that the base below the track has been set at the incorrect height. A track that sits either too high or too low can create both practical and aesthetic problems.
If the track protrudes above floor level, it can become a trip hazard and disrupt the seamless appearance. If it is installed too low, it can also cause a trip hazard whilst also potentially collecting dirt and debris.
2. The track is too high
According to Edward, a track that sits too high is usually the result of excessive build-up in the base construction.
Correcting the problem often requires excavation and rebuilding of the base to the correct level. In a new-build project this may be manageable, but on an extension where floor levels need to align with an existing property, the solution can be much more complicated. In some cases, the track may ultimately have to remain slightly proud of the finished floor level.
3: The track is too low
A track that has been set too low can sometimes be raised by packing beneath the frame. However, the amount of adjustment available depends on the door system and the tolerances that have been built into the opening.
Because raising the track involves raising the whole door system the installers must ensure there is sufficient clearance at the head of the system. Exceeding the available tolerances would likely require alterations to the opening itself – something that is potentially costly.
How to achieve a perfect flush finish
1. Choose flooring early
One of the most important decisions is selecting internal and external flooring materials before final measurements are taken.
The thickness of flooring finishes directly affects how the track aligns with the finished floor level. Changing from a 10mm tile to a 20mm timber floor after the doors have been specified can compromise the flush finish entirely. Knowing floor build-ups at the design stage allows accurate calculations and avoids expensive adjustments later.
2. Work with experienced specialists
Flush tracks remain a specialist feature in UK homes, and not every builder or installer has experience of delivering them successfully.
Before appointing a supplier or installer, ask to see examples of previous projects. Proven experience with flush track systems can help prevent costly errors and ensure the finish meets expectations.
3. Communicate clearly
Another common cause of installation problems is miscommunication about finished floor levels.
Surveyors measuring the doors and system manufacturers need accurate information about depth of floor finishes so these can be included into calculations and any CAD drawings for the door system. Clear communication between homeowners, builders and suppliers is essential.
4. Don’t compromise on the vision
Although flush track systems demand greater precision than standard thresholds, the visual benefits are significant. Edward Stobart notes that some contractors may try to steer clients away from flush tracks because they require more planning and attention to detail. When installed correctly, however, the result is a far superior connection between home and garden, delivering the uninterrupted views and seamless living experience that homeowners are seeking.
For more information on installing a flush track system in your project, the experts at IDSystems are on hand to help.
