products
IW Windows
Frameless and slim-profile windows
Frameless and slim-profile windows for contemporary and period homes. IW Windows maximise the glass and minimise the visible frame, from fixed frameless panes and frameless glass corners to opening windows — pivot, tilt and turn, sliding and hinged — in slim aluminium, steel or wood frames. Each window is made to the project, with bespoke glass sizes up to 4,000 x 2,000mm. Larger or stepped openings can be glazed with panes joined glass to glass, and sizes above the stated maxima are considered project by project. We detail with the architect so the glazing reads as part of the building rather than an insert.
Overview
Max Panel Size
4,000 x 2,000mm
Max Panel Glazing
4,000 x 2,000mm
Max Panel Weight
1.6 Tonnes
Features & Benefits
Frameless glass windows
Fixed panes with the frame concealed in the floor, walls and ceiling, so only the glass is seen from inside. Used for picture windows, clerestories and frameless glass corners.
Slim-profile opening windows
Where a window needs to open, pivot, tilt and turn, sliding and hinged sashes in slim frames sit alongside the fixed panes and keep the sightlines consistent.
Glass-to-glass and stepped windows
Larger openings and stepped glass windows can be glazed with panes joined glass to glass, so the view is continuous across the change in level or plane.
Tailored to the building
Sizes, shapes, glass build-ups and frame finishes are specified project by project, for new-build, extension and period settings. Sizes above 4,000 x 2,000mm are assessed per project.
Thermal and acoustic performance
Double or triple glazing, with toughened or laminated glass where safety or security requires it. Performance is specified to the project (see technical specifications).
Applications
Frameless glass corner windows
Two panes meeting with no corner post, for uninterrupted views at the corner of a room. See glass-to-glass connections for how the junction is detailed.
Picture and floor-to-ceiling windows
Large fixed frameless panes, up to 4,000 x 2,000mm per pane, that frame a view and bring daylight deep into the plan.
Stepped and multi-pane openings
Stepped glass windows and larger openings glazed glass to glass where the architecture needs a continuous plane.
Windows for period and rural homes
Slim-profile and frameless windows alongside traditional materials, as at Cloately Manor, Manor Farm and Winkford Farm.
Bespoke shaped windows
Gable, raked and irregular shapes made to the opening.
Technical Specifications
Glass Types
Available in toughened, laminated, or double/triple-glazed options for enhanced performance and security.
Maximum Sizes
Bespoke glass sizes up to 4,000mm x 2,000mm per pane. Larger openings can be glazed with panes joined glass to glass, including stepped glass windows. Sizes above these maxima are considered project by project.
Thermal Performance
Double or triple glazing specified to the project's thermal targets. U-values are confirmed per project.
Framing Options
Available in aluminium, steel, or wood frames, offering flexibility for both modern and traditional designs.
Acoustic Insulation
Specialised glass options available for superior soundproofing, ideal for urban environments or noisy locations.
What's the difference between frameless and slim-framed windows?
Frameless windows hide the frame in the surrounding structure, so you see only glass. Slim-framed windows keep a visible but very narrow frame, which is what allows a window to open — as pivot, tilt and turn, sliding or hinged.
Can frameless windows open?
Fully frameless panes are fixed. Where you need ventilation, pivot, tilt and turn, sliding or hinged windows in slim frames can be combined with them.
Are frameless windows suitable for older houses?
Often, yes, but in listed buildings and conservation areas it depends on consent, so we recommend speaking to the conservation officer early. We can advise on detailing options.
What size can a frameless window be?
Bespoke glass sizes up to 4,000 x 2,000mm per pane. Larger or stepped openings can be glazed with panes joined glass to glass. Sizes above the stated maxima are assessed per project.