If you are weighing up bifold doors versus sliding doors, the best choice usually comes down to how you want the opening to work day to day.
Open a larger section of the wall by folding the panels back. Good if you want the widest opening possible.
Typically give you a large glazed view with a simpler movement, but the opening is usually partly fixed because panels slide behind each other
If you want advice on which suits your project, Essential Aluminium Ltd can talk you through it based on your opening, layout and preferences.
See: https://essentialaluminium.co.uk/bifold-doors-in-newcastle-upon-tyne
See: https://essentialaluminium.co.uk/aluminium-bifold-doors-newcastle-upon-tyne