European Windows in Burlington: Triple-Glazed Windows, Lift & Slide Doors and Large Glazing
Plenty of Burlington projects start with the view and work back to the wall. InterHaus supplies and installs Internorm triple-glazed windows, lift & slide doors and frameless glazing, plus Reynaers and Schüco aluminum systems, from our Oakville showroom, and gives your designer the window data needed to keep a glass-heavy house within the energy code.
The short answer
Burlington homeowners can buy Internorm windows and doors through InterHaus, the brand’s official Canadian dealer, which specifies, supplies and installs them from a showroom in Oakville. Choices include triple-glazed tilt and turn windows, KS 430 and HS 330 lift & slide doors, HX 300 frameless glazing, and all-aluminum Reynaers and Schüco systems. Ontario lists Burlington at 3,740 heating degree-days, which is climate Zone 1.
More glass, and what the energy code says about it
A Burlington custom home or major renovation often comes down to one question early in design: how much of this wall can be glass? European systems push that answer further than most. Internorm lift & slide doors carry sashes of up to 400 kg on rollers you can move with a light push, and the frameless HX 300 takes single panes of up to 10.5 m², while the glass in both stays triple glazed.
The energy code puts a frame around that ambition. Ontario’s SB-12 prescriptive packages assume windows and other glazing make up no more than 17% of the gross wall area. Between 17% and 22%, every window has to step up one level of performance, for example from a maximum U-value of 1.6 to 1.4 W/m²K. Beyond 22%, the house must be designed through the performance path with an energy model. A glass-heavy design is entirely achievable, but the window data needs to be in hand early.
That is where an accurate window schedule earns its keep. We set out the system, size, opening type and glazing for each unit, so your designer and energy modeller work from the products that will actually be installed rather than generic placeholders. Bear in mind that SB-12 is written around Canadian ratings from CSA A440.2 or NFRC testing, not European Uw values, so ask at quote stage if the energy model needs them for particular units.
Large-opening systems side by side
Published figures for each system’s best configuration. Achievable sizes and weights depend on glazing and layout, and we confirm them for each opening.
| KS 430 | HS 330 | HX 300 | Schüco ASE 80.HI | Reynaers MasterPatio | |
|---|---|---|---|---|---|
| Type | Lift & slide door | Lift & slide door | Frameless fixed glazing | Lift & slide door | Lift & slide door |
| Frame | uPVC or uPVC/aluminum | Wood/aluminum | Built into the wall, 58 mm visible outside | Aluminum | Aluminum |
| Uw as low as (W/m²K) | 0.64 | 0.73 | 0.74 | 0.9 | 0.8 |
| Sound reduction | 33–43 dB | 32–40 dB | 34–47 dB | up to 43 dB | up to 43 dB |
| Construction depth | 200 mm (uPVC), 203 mm (clad) | 209 mm | 100 mm | 180–292 mm | 180 mm |
| Size notes | Elements up to 6500 × 2800 mm, sash up to 400 kg | Glass up to 3.2 m high, sash up to 400 kg | Single glass areas up to 10.5 m² | 80 mm profile width | 64 mm profile width |
Figures from the InterHaus product pages and the Internorm 2026/27 catalogue. They are European ratings; Canadian code ratings come from a separate test.
Exposed elevations, wind and the Canadian window label
A house on an open lot, or one facing open water, puts far more wind and driving rain on its windows than a house on a sheltered street, and a large sliding door presents the biggest surface to it.
In Ontario, manufactured windows and doors must conform to the North American Fenestration Standard (NAFS) and its Canadian Supplement, CSA A440S1, with performance grades chosen for the building’s location and conditions. A Canadian label shows the design pressure, the water penetration test pressure and the air infiltration and exfiltration levels. Structural testing under the standard is done at 150% of the design pressure.
Two features of Internorm’s construction help on the exposed side of a house. Every opening sash closes against three layers of gaskets, and on the clad models an aluminum outer shell takes the weather so the frame behind it does not. Lift & slide doors add their own seal: turning the handle lowers the sash back down onto its gaskets, where it stays until you lift it again. Have the required performance grades confirmed with your designer before an order is placed.
Aluminum windows, folding doors and glass walls
For an all-aluminum look we supply Schüco and Reynaers systems alongside Internorm. On the door side, the choice is mostly between lift & slide and folding. A folding door clears the full width of the opening, which is hard to beat for a summer terrace, but its many vertical joints cost insulation. Compare a Uw as low as 1.3 W/m²K for the Reynaers Concept Folding 77 with 0.8 for the Reynaers MasterPatio lift-slide. Schüco’s AS FD 90.HI folding system publishes a much better figure, with a Uw as low as 0.8 and up to 45 dB of sound reduction.
Where a whole elevation is glass, a facade or curtain wall system takes over from individual windows. The Schüco FWS 50.SI reaches a Uw as low as 0.7 with a 50 mm frame, and the Reynaers CW 50-HI curtain wall reaches 0.8 with up to 47 dB of sound reduction. On the same house, Internorm wood/aluminum windows can bring warm timber interiors to the rooms behind a striking aluminum glass facade.
You can compare the door systems on our Schüco aluminum doors and Reynaers aluminum doors pages, or see every Internorm sliding option on the lift & slide doors overview.
Windows for the rest of a Burlington house
Big glass sets the tone, but most of a house is ordinary rooms. These are the Internorm windows that usually fill them.
KF 410 uPVC/Aluminum
The all-round tilt and turn window: Uw as low as 0.62, 34–47 dB, Passive House Institute certified, aluminum outside and easy-care uPVC inside.
KF 510 uPVC/Aluminum
A slimmer frame and sash (70 mm plus 25 mm) put more glass in each opening, while I-tec Secure locking flaps grip the frame on every side.
HF 410 Wood/Aluminum
Spruce, larch, oak or walnut on the room side and aluminum outside, Uw as low as 0.64. The natural partner for an HS 330 timber lift & slide door.
KV 440 with integrated blinds
Blinds sit between the panes, so sun-facing glass can be shaded without dust or exterior hardware. Uw as low as 0.64, 39–45 dB.
Burlington’s climate zone and what applies to your project
Ontario’s SB-1 climate tables list Burlington at 3,740 heating degree-days with a January design temperature of −17 °C, which puts it in SB-12 Zone 1 (under 5,000). For an addition in Zone 1, for instance, windows must reach a maximum U-value of 1.6 W/m²K or an Energy Rating of 25. A one-storey sunroom addition is deemed to comply when its windows, doors and walls reach 1.4 with non-electric heat, which suits a glazed garden room.
Part 9 of the code adds a condensation rule for places with January design temperatures between −15 °C and −30 °C, Burlington included: windows and doors need a U-value of 2.0 or better, or a Temperature Index of at least 68. Where SB-12 asks for more, the stricter value applies. The Internorm figures on this page sit far below that 2.0 limit, even allowing for the gap between European and North American test methods.
Owners of existing houses can look at the Enbridge Gas and IESO Home Renovation Savings Program, which pays $100 for each rough opening fitted with an ENERGY STAR certified window or door, provided an energy assessment comes first and at least two upgrades are made. New builds are not eligible. For typical installed price ranges, see what European windows cost in Ontario, and for how tilt and turn hardware works, read our tilt and turn windows guide.
From the Oakville showroom to a Burlington site
Large glass is heavy, expensive to get wrong and hard to fix later. This is how we keep a Burlington project on track.
Try the doors at full size
Lift & slide doors are on display in the showroom, so you can feel a heavy sash lift, glide and lock before choosing a frame material.
Drawings reviewed by specialists
Our product specialists have architectural backgrounds and review openings, wall sections and thresholds with your designer.
Data for the energy model
A window schedule with the system and glazing for each opening helps your designer test glazing ratios against SB-12.
Ontario warehouse
Units are received at our local warehouse, then delivered to site on a date agreed with your builder.
Installation or supervision
Our fitters set the large units, or our team supervises your builder’s crew through handling, levelling and the threshold detail.
After-sale service
Once you have moved in, we stay available to grease hinges, fine-tune hardware and deal with small issues.
“Absolutely thrilled with our new windows and doors from InterHaus! The quality is exceptional, and the energy efficiency has made a noticeable difference in our home! Viktoriya and Alex were professional, helpful, and made the entire process effortless. The installation was smooth, and the final result completely transformed our space. Couldn’t be happier—highly recommend!”
Burlington window and door questions
Internorm’s KS 430 comes in elements up to 6500 × 2800 mm with sashes up to 400 kg, and the HS 330 takes glass up to 3.2 m high. The real limit for your opening depends on the glazing and layout, so we confirm it per opening before quoting.
Not with triple-glazed, thermally insulated systems. The HX 300 frameless glazing has a Uw as low as 0.74 W/m²K and the KS 430 as low as 0.64, so the inner pane stays far warmer than on standard double glazing. The energy code still limits how much glass a prescriptive design can have, so check the glazing ratio early.
Folding doors open the full width but insulate less because of their many joints; the Reynaers Concept Folding 77 publishes a Uw as low as 1.3, against 0.8 for the Reynaers MasterPatio lift-slide. If you use the opening mainly in summer, folding works well. For a year-round view, lift & slide is generally the warmer choice, although Schüco’s AS FD 90.HI folding door also publishes 0.8.
Yes, provided the right performance grade is specified. In Ontario, windows must meet NAFS and the Canadian Supplement, with grades chosen for the location, and the Canadian label shows the design pressure and water penetration test pressure. Internorm sashes seal against three layers of gaskets.
Under SB-12, prescriptive packages assume glazing of 17% or less of the gross wall area. Between 17% and 22% each window must improve by one step, and above 22% the performance path, with energy modelling, is required.
Visit the InterHaus showroom on Speers Road in Oakville, where lift & slide doors, entrance doors and windows in each frame material are on display. Visiting details are on our Oakville showroom page.
Bring us the view you want to frame
Send drawings or photos of your Burlington project, or visit the Oakville showroom to try the doors. We will match a system to each opening and quote it line by line.
Sources
We checked the climate, code and incentive details below on November 10, 2026. Product figures are manufacturer data from our product pages and the Internorm 2026/27 catalogue.
- SB-1 Climatic and Seismic Data (Table 2) · Government of Ontario, 2024 Building Code Compendium · Burlington 3,740 HDD, January design temperature −17 °C.
- SB-12 Energy Efficiency for Housing · Government of Ontario, 2024 Building Code Compendium · Zones, the 17% and 22% glazing thresholds, and addition and sunroom rules.
- Part 9: Housing and Small Buildings (Table 9.7.3.3, NAFS and A440S1) · Government of Ontario, 2024 Building Code Compendium
- Appendix A explanatory material (A-9.7.4.2.(1), Canadian window labels) · Government of Ontario, 2024 Building Code Compendium
- Home Renovation Savings Program: with assessment · Enbridge Gas and IESO
- Home Renovation Savings Program: Additional Program Eligibility Requirements (Nov 2025) · Enbridge Gas and IESO