Frameless Windows: Glass Walls With the Frame Built Into the Wall
Frameless fixed glazing hides the frame inside the wall so that, from inside, you see glass and view rather than profiles. Here is how it works, where it makes sense in a Canadian home, and how to combine it with doors and windows that open.
What makes a window “frameless”
Every pane of glass needs a frame to hold it, seal it and tie it to the building. A conventional window shows that frame as a band of profile around the glass. A frameless system keeps the frame but moves it out of sight: the structural frame is integrated into the wall assembly, and from the interior only the glass remains visible.
In Internorm’s range that job belongs to the HX 300, a timber/aluminum fixed glazing system that is built right into the masonry, so the frame almost disappears into the facade. Outside, a slim aluminum edge remains; inside, the wall finish runs right up to the glass.
The trade-off is simple: frameless glazing is fixed. It brings in light and view, while ventilation and access come from the lift & slide doors and tilt & turn windows placed around it. Designing those companions well is what makes a frameless wall work, in a new custom home or in a high-end renovation.
Why architects and homeowners choose frameless glass
More daylight per opening
With no visible frame taking up the opening, more of the wall becomes glass and daylight reaches deeper into the plan.
Rooms that read larger
A continuous glass surface without corners or mullions makes interiors feel bigger and brighter.
An uninterrupted view
A garden, ravine, lake or skyline becomes part of the room instead of a picture inside a frame.
Clean wall junctions
Plaster, render or brick meets the glass directly, so the opening looks cut from the wall rather than fitted into it.
Insulated, not just beautiful
Triple glazing, plus a frame built into the wall that helps thermal efficiency and keeps drafts out, means a big glass wall need not mean a cold room.
Any architectural style
Internorm presents its frameless glazing as suitable for all styles of property, from minimalist new builds to high-end renovations.
More glass, without paying for it in heat loss
The old rule for cold climates was to keep glass areas small. Triple glazing changed that arithmetic: according to Internorm, choosing triple thermal-insulation glazing instead of double glazing lets you incorporate 40% more glass area without increasing heating costs. Frameless fixed glazing is the most direct way to put that extra glass where it counts.
Orientation still matters. South-facing glass collects welcome winter sun but can overheat a room in summer, so plan sun control at the design stage, whether that is a roof overhang, exterior blinds on neighbouring openings or trees on the property line. North-facing glass brings soft, even light all day.
On very cold, clear mornings you may occasionally see condensation on the outside of high-performance glass. Internorm treats this as evidence the glazing is working: the inner panes hold the heat in so well that the outer pane stays relatively cold, and the mist clears as the day warms.
The wall does the framing
Because a frameless unit is built into the wall rather than set into an opening, it has to be designed with the wall. The frame sits within the assembly, its connection to the structure is detailed for airtightness and insulation, and the interior and exterior finishes are brought up to the glass. Internorm positions the HX 300 specifically for floor-to-ceiling glass, with a wall connection designed for that job.
That makes frameless glazing a decision for the drawing stage, not the window order. It works best when opening sizes, wall build-up and finish details are settled with the glazing supplier early, and InterHaus provides technical support to architects and builders on exactly these points.
Where several panes meet, the joints between them are close to invisible, so a long run of glass reads as one surface.
Pairing frameless glass with lift & slide doors and windows
A frameless wall is rarely glass alone. The strongest compositions put fixed glazing beside a door you can open and windows you can tilt for fresh air, all sharing one exterior finish.
With lift & slide doors. Internorm’s lift & slide doors can be combined with fixed glazing for even bigger glass surfaces, and the frames of their fixed elements can be buried in render so the stationary glass appears virtually frameless. An HS 330 timber/aluminum lift & slide door beside HX 300 panels keeps timber inside and aluminum outside across the whole wall.
With windows. Internorm suggests combining HX 300 with its timber/aluminum windows, such as the HF 410, so a frameless panorama in the living room and tilt & turn windows elsewhere share one facade colour.
With uPVC/aluminum systems. Internorm’s aluminum cladding can be matched across its timber/aluminum and uPVC/aluminum ranges, so a KS 430 uPVC/Aluminum door can join the same elevation.
Three ways to achieve a frameless look
Each approach suits a different part of the plan, and most projects use more than one.
| HX 300 fixed glazing | Rendered fixed panel in a lift & slide door | Fixed timber/aluminum window | |
|---|---|---|---|
| How it works | Frame integrated into the wall | Stationary element of the door, rendered into the wall | Fixed light with a slim visible profile |
| Visible frame inside | None, glass only | Virtually none on the fixed panel | Slim frame |
| Opens? | No | Sliding sash alongside | No; combine with tilt & turn |
| Largest glass | Up to 10.5 m² per pane | KS 430 elements up to 6500 × 2800 mm | Sized to the window system |
| Uw, as low as (W/m²K) | 0.74 | 0.64 (KS 430), 0.73 (HS 330) | 0.64 (HF 410) |
| Best for | Panoramas and floor-to-ceiling walls | Terrace and garden walls | Smaller fixed lights beside opening windows |
Best-case published values for each system.
Planning a frameless opening
The sequence we work through with homeowners, architects and builders.
- 01
Share the design early
Send plans and elevations while the wall build-up is still flexible. Frameless glazing is easiest to integrate when it is designed in rather than added late.
- 02
Settle the wall connection
We review the structure around the opening, the insulation and air barrier, and how interior and exterior finishes meet the glass.
- 03
Choose the companions
Decide which openings slide, which tilt and which stay fixed, then match materials and exterior colour across the set.
- 04
Specify glass and shading
Select glass for insulation, sound and safety, and plan sun control for south- and west-facing walls.
- 05
Install with supervision
Airtightness and insulation depend on correct installation, so InterHaus guides and supervises the work on site.
“My preferred window supplier for any of our projects with ambitious sustainability or indoor comfort goals. They have been easy to work with, and responsive when I need a problem solved. Internorm products have served me well, and these are the best, most reliable suppliers I have found in eastern Canada.”
Frameless windows: common questions
Yes, when they are built as insulated systems. The HX 300 is triple-glazed with a published best-case Uw of 0.74 W/m²K, and setting the frame into the wall adds to its thermal efficiency. Frameless glazing is used in Passive House and Net Zero homes.
No. Frameless glazing is fixed by design. For air and access, place a lift & slide door or tilt & turn windows beside it; a frameless panorama next to a sliding door onto the terrace is a typical composition.
It can, but it involves the wall itself, because the frame becomes part of the wall build-up. High-end renovations that open up a rear wall or rebuild an elevation are good candidates, and we assess the existing structure and finishes first.
The HX 300 allows panes of up to 10.5 m² each, and almost invisible joints between panes let you continue the glass further. The HX 300 page has the full technical data.
Like any large window. The glass-only surface needs an occasional wipe, and outside, the aluminum cladding takes the weather. For upper floors, plan exterior access at design stage.
It helps, because someone has to detail the wall connection, finishes and structure. Our product specialists come from an architectural background and work directly with your architect, designer or builder on those details.
Explore frameless glazing and its companions
HX 300 frameless fixed glazing
Technical data, construction and installation.
Explore
Lift & slide doors
Doors that slide open beside fixed glass.
Explore
HS 330 Timber/Aluminum
The timber lift & slide door that pairs with HX 300.
Explore
Timber/aluminum windows
HF windows that share the HX 300 exterior.
Explore
Passive House
How we support high-performance builds.
ExplorePlanning a wall of glass?
Send us your plans and elevations and we will advise on pane sizes, the wall connection and the doors and windows to pair with it, then prepare a detailed quote.