Timber combines good insulation and durability with the amazing look you've come to expect from high-quality hardwood or softwood. That's why wooden windows and external or internal doors are so popular. When customising your new bifold door with windows24.com, you can choose between different hardwoods and softwoods, including spruce, meranti and oak. If you're looking for an even more robust door that's highly resistant to warping, you can also opt for an aluminium composite construction with an internal wooden core and an aluminium shell on the outside.