Opening and structure
Coordinate the clear opening and structural design before finalising frame dimensions. See how this fits within a house extension.
Extensions and glazing
Bi Fold Door Installations
Bi-fold doors work best when the opening, structure, glazing and external threshold are designed together with the surrounding renovation.
Plan the whole opening
A wide glazed opening affects more than the door specification. Structural support, frame dimensions, thermal performance, floor build-up, external levels and drainage all need to work as one detail. Treating those decisions as part of the extension or refurbishment design reduces avoidable changes after a system has been ordered.
Glazing and threshold
Compare panel arrangements, sightlines, thermal performance and the junction between inside floor, threshold and external drainage.
Installation sequence
Allow for surveys, structural work, weather protection, installation, adjustment and the finishes that meet the frame.
Decisions to make before ordering
- Confirm the structural opening and any temporary works with the project design team.
- Choose the panel layout, opening direction and everyday access arrangement.
- Coordinate frame depth, glazing specification and surrounding insulation with the building-regulations design.
- Resolve floor levels, the external threshold and drainage rather than treating them as separate details.
- Agree who surveys the finished opening and how the door installation fits the wider construction programme.
Read before briefing the work
Bi-fold doors installation guide
Selection, installation and maintenance considerations for bi-fold doors in a London home extension.
Bi-fold doors installation in London
Design, planning and installation questions to resolve before construction.
Building regulations compliance
How design and construction information are coordinated for building-regulations compliance.