Glazed back door in Aluprof MB-86 Fold Line HD

The Aluprof MB-86 Fold Line HD is the bifold door — the folding door — from the same family as the MB-86N: the frame is 86 mm deep, the door leaves 77 mm, and the profile joints, seals and some of the profiles are shared. The manufacturer gives leaves from 700 to 1,200 mm wide and up to 3,000 mm high, up to 120 kg per leaf, and a door set of up to eight leaves folding inwards or outwards. Where a lift-and-slide door always leaves at least one panel in front of the opening, here everything folds aside against the reveal. Powder coated in any RAL colour.

Aluminium bifold doors on the MB-86N platform: up to eight leaves, and the whole opening clear.

One door that opens outwards rather than inwards, glazed from top to bottom: a back door that works as a window onto the garden as well.

Where a front door opens inwards, this door opens outwards: the leaf swings over the patio rather than into the room, so it stays out of the way of the kitchen or living room behind it. The door itself is glass, more so than a front door, because the view of the garden is usually the point. If you are looking for a solid or half-glazed back door, note that this layout is a glazed door.

The standard size is 1,000 × 2,100 mm, the same as a single front door but with the opening direction reversed. If you want a wider opening onto the patio, French doors — two of these doors side by side — or a sliding patio door are the layouts made for that.

All about the Aluprof MB-86 Fold Line HD profile All about the glazed back door layout