Frameless & Demountable Glass Systems

A frameless partition holds each glass panel in a slim channel at the floor and ceiling. Vertical joints between panels are closed with clear silicone or a slim polycarbonate jointing strip, so the run reads as one sheet. Without mullions interrupting the view, light transfer and sightlines are as good as glass walls get.

Detailing matters more than with framed systems because there is nowhere to hide. Head channels should be recessed or aligned with ceiling lines, joints kept plumb and consistent, and the glass edges polished. Our frameless glass partitions guide covers specification, detail and finishes.

A demountable partition is assembled from components that can be unclipped, removed and reinstalled without destroying them. Panels are dry-glazed into gaskets rather than bonded with silicone, tracks are mechanically fixed, and doors hang on removable frames. Many demountable systems are framed, but frameless demountable systems are also available.

Not every glass partition is demountable. Systems bonded with structural silicone or built into plasterboard are effectively permanent. The detailed comparison is in our flagship guide, demountable vs fixed glass partitions.

Demountable systems cost more on day one. They pay back when layouts change during the lease, when the tenant expects to take the partitions to the next building, or when dilapidations would otherwise require full strip-out. They are less compelling on long leases with stable layouts.

Our guide to when a demountable system makes commercial sense works through the numbers and the questions to ask before committing.

Frameless does not have to mean noisy. With acoustic laminated glass, sealed joints and a framed or fully sealed door, frameless single-glazed partitions give good privacy for everyday meeting rooms. Double-glazed demountable systems reach the higher ratings needed for boardrooms. See acoustic glass partitions for how ratings work.

Relocating a demountable partition means surveying the new layout, checking ceiling heights and floor levels, disassembling and protecting components, then reinstalling with new perimeter seals and any extra panels needed. Glass cut for one ceiling height cannot simply be stretched to another, so reuse is best planned early.

Our tenant’s guide to moving and reconfiguring glass walls explains what can be reused and what to budget for.

Frameless systems are the default for corridor runs, meeting room fronts and reception screens where maximum openness matters. Demountable systems are common in flexible workspaces, serviced offices, fast-growing businesses and tenants on shorter leases. For broader office planning, see office glass partitions; for the full range of systems, see glass partition walls.