Bifolding doors continue to be an increasingly popular choice for new build and renovation projects. There are many factors to consider, but the choice of material is probably one of the most important considerations.
In the high end, bespoke bi folding doors market, there are really just 3 choices for consideration.
Firstly there are thermally broken aluminium systems which are by far the most commonly used and indeed the most popular choice for many reasons. Panels are constructed from extruded aluminium profiles which are split by a poly-amide thermal break which helps prevent heat transfer between the inside and outside of the door. This is the minimum requirement for any aluminium door to ensure it conforms to building regulations.
Choosing an aluminium system means your doors are virtually maintenance free. Aluminium is far harder wearing and much longer lasting than uPVC. It can be finished in any RAL colour and you can choose from a number of finish options.With the benefit of large panel sizes and slim slightlines, aluminium is aesthetically pleasing. Marine treatment is also available when needed for coastal areas to prevent saline corrosion. Bearing all this in mind, along with the fact that two thirds of all the aluminium ever produced is still in use today, making is an ecologically sound choice. You can see why aluminium systems are the most popular.
Timber systems are also a popular choice. The highest quality timber systems are produced in engineered timber that has been triple laminated to increase the strength and reduce chances of the timber warping over time. The types of timber available vary, but oak and pine are used the most regularly.
As timber is naturally insulating compared to aluminium, there is no requirement for a thermal break between the interior and exterior faces.
And finally, there are composite bifolding doors. This is a combination of aluminium and timber. Choosing a composite system allows for all the warm and natural appearance of timber internally, whist providing all the maintenance free benefits of aluminium to the exterior. Due to weathering, any system using timber externally would require re-painting or staining within two to three years, then annually thereafter. This requirement is therefore avoided through the use of a composite system.
Author Carly Grigglestone: Sunfold Systems