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Bi Fold Doors


Thermaspec bifold doors can transform your living space and open a multitude of possibilities in your home, making it a lighter, more welcoming environment in which to live and break down the barriers between inside and out. No other item in your home can transform your living space in this way.

The advantages of bifold doors over traditional sliding patio doors is that unlike the latter that typically only open half of the available opening, bifold doors fold back to just a few inches of the opening so considerably more of the outside environment can be enjoyed, utilising space and making them the ideal choice for apartments as well as houses. Combined with longevity, the convenience and versatility they offer is endless.

The concept of bifold doors has evolved from the patio doors of the mid 1900 & 1939's which were fully-glazed but basic sliding or opening doors, whose quality of construction was far inferior to the Thermaspec standard offered today. The new alternative is cleverly designed, aesthetically beautiful, bifold doors that are energy efficient, available is a range of materials and finishes, provide better security and safety, and when constructed from Warmcore Aluminium or uPVC, are practically maintenance free too!

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Open your home to a whole new look

Thermaspec UK Slide and Swing Bi-Fold Doors

Thermaspec UK Bi-Fold Doors - Exterior photo

Thermaspec UK Living Room with Bi-Fold Doors

Making the most of your indoor and outdoor living space with the latest Slide and Swing technology.

  • Seamless beautiful lines - with specially designed hardware to provide a slim stack
  • Easy to operate - totally flexible with the option slide on panel at a time
  • More living space - connects your home and garden seamlessly
  • Patented Magnaline™ - slide and stack technology
  • Colourful - Available in a modern profile with a huge range of stunning colours

A key feature of bifold doors is their ability to seamlessly open the space between the house and the garden, and due to their unique flushed tracking systems, you can extend a tiled kitchen or conservatory floor right through to the outside, which will enhance a patio area and create one large living space, ideal for entertaining and taking full advantage of the summer months.

One of the key capabilities of bifold doors is that they are totally retractable and there are multiple opening configurations to choose, from opening into or out of a room and folding to the left or right, to a corner configuration set which can be installed to wrap around the side of a property transforming a dark corner into a feature that floods light into the room. Whichever option you choose, the result is always the same - more light and space.


Slide and Swing Colour Options

Thermaspec UK Slide & Swing Colour options


PVC Doors

Thermaspec UK uPVC Door and Door Handle

Thermaspec UK uPVC Door

Click Here to view our PVC doors and more ways to extend your rooms


Warmcore Aluminium - Fresh, Clean Design

WarmCore is an innovative aluminium folding sliding door system which incorporates a radically different product design approach to deliver a new high performance fenestration framing solution: “warm aluminium”. At Thermaspec, we are redefining thermal performance in wide span aluminium doors.

Built around a belief that beauty doesn’t have to compromise performance, WarmCore Aluminium doors were created out of a desire to combine the desirability and durability of aluminium with unparalleled insulation. The unique, full width thermal core is key to why WarmCore options are 25% more thermally efficient than traditional aluminium systems. Strong and secure, WarmCore Bi-fold doors come with multi-point locking, internal beading and are backed by our 10-year product guarantee - helping keep you and your home safe.

Click Here to View Our Warmcore Door Range

For more information about our doors please contact us


More Doors

Composite Doors

Composite Doors

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French Doors

French Doors

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Patio Doors

Patio Doors

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PVC Doors

PVC Doors

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