The European window market is organized in two layers: system providers that design and extrude the profiles, and independent fabricators that cut, assemble and glaze the finished window. When you ask for "Reynaers windows" or "Rehau windows", you are naming the profile system, not the company that builds your unit - so the questions that matter are which platform, which configuration, and who stands behind the finished window. This guide covers 14 providers: the 5 system providers I quote (Reynaers, Aluprof, Aliplast, Cortizo in aluminum, Aluplast in uPVC) and 9 benchmarks, with flagship windows from 2.76 to 3.62 in (70 to 92 mm) deep and best published values from U-0.10 to U-0.16 (Uw 0.59 to 0.90 W/m2K).
I am an independent agent sourcing European windows and doors for projects in the US and Canada, so read this knowing that I quote five of these providers and not the other nine. Every company fact and number below comes from the provider's own website or catalog, accessed 2026-10-30.
System provider vs window manufacturer
A system provider designs the profiles, the gaskets and the tested combinations, and publishes the catalog; it does not build your window. The chain has three steps:
- System provider - designs and extrudes the aluminum or uPVC profiles and publishes depth, Uf, Uw and test classes.
- Fabricator - an independent European workshop buys those profiles, cuts, welds or crimps them, fits hardware and glass, and builds each unit to your schedule.
- Agent or importer - takes your drawings, specifies the system, checks shop drawings and ships to your site.
The warranty sits with whoever sells you the finished unit, not with the profile brand on the label. For what I supply in aluminum, wood, aluminum-clad wood and uPVC, Windows Guy issues a 10-year written warranty; real steel terms are confirmed per project.
The providers side by side
The company table lists headquarters, founding year and ownership for all 14 providers, as each states it.
| System provider | Materials | Headquarters | Founded | Ownership | Do I quote it |
|---|---|---|---|---|---|
| Reynaers | aluminum | Duffel, Belgium | 1965 | Family-owned | yes |
| Aluprof | aluminum | Bielsko-Biala, Poland | 1951 | Grupa Kety (WSE-listed) | yes |
| Aliplast | aluminum | Lokeren, Belgium | 1984 | Corialis Group | yes |
| Cortizo | aluminum | Padron (A Coruna), Spain | 1972 | Family-owned | yes |
| Aluplast | uPVC | Karlsruhe, Germany | 1982 | Family-owned | yes |
| Schuco | aluminum, uPVC | Bielefeld, Germany | 1951 | Otto Fuchs group | no - benchmark |
| Wicona | aluminum | Ulm, Germany | 1948 | Hydro | no - benchmark |
| Heroal | aluminum | Verl, Germany | 1874 | Family-owned | no - benchmark |
| Rehau | uPVC | Muri, Switzerland | 1948 | Family-owned (REHAU Group) | no - benchmark |
| Veka | uPVC | Sendenhorst, Germany | 1969 | Family-owned (VEKA Group) | no - benchmark |
| Kommerling | uPVC | Pirmasens, Germany | 1897 | profine Group, owner-managed | no - benchmark |
| Gealan | uPVC | Oberkotzau, Germany | 1921 | VEKA Group | no - benchmark |
| Deceuninck | uPVC | Hooglede-Gits, Belgium | 1937 | Listed on Euronext Brussels | no - benchmark |
| Salamander | uPVC | Turkheim, Germany | 1917 | Family-owned | no - benchmark |
Company facts from each provider's own site, accessed 2026-10-30. A system provider designs and extrudes the profiles; independent fabricators build the windows.
The aluminum table compares flagship windows on depth, thermal values, glass thickness and test classes.
| Platform | Status | Frame depth | Uf (W/m2K) | Best Uw (W/m2K) | Max glazing | Sightline | EN class: air; water; wind |
|---|---|---|---|---|---|---|---|
| Reynaers MasterLine 8 | I quote it | 77 mm (3.03") | 1.30 | 0.88 (U 0.16) | 72 mm (2.83") | 97 mm (3.82") | 4; E900 or E1200 (Hidden Vent); C5 |
| Aluprof MB-86 | I quote it | 86 mm (3.39") | 0.74 | 0.60 (U 0.11) | 70 mm (2.76") | n/p | 4; E1200 (windows) or E4500 (doors); C5 |
| Aliplast Genesis 75 | I quote it | 75 mm (2.95") | 0.84 | 0.85 (U 0.15) | 54 mm (2.13") | n/p | 4; E1200; C5 |
| Cortizo COR 70 Hidden Sash | I quote it | 70 mm (2.76") | n/p | 0.84 (U 0.15) | 40 mm (1.57") | 66 mm (2.60") | 4; E1800; C5 |
| Schuco AWS 75.SI+ | benchmark | 75 mm (2.95") | 0.90 | 0.90 (U 0.16) | 61 mm (2.40") | 91 mm (3.58") | 4; 9A; C5 or B5 |
| Schuco AWS 90.SI+ | benchmark | 90 mm (3.54") | 0.71 | 0.80 (U 0.14) | 68 mm (2.68") | 99 mm (3.90") | 4; 9A; C5 or B5 |
| Wicona WICLINE 75 evo | benchmark | 75 mm (2.95") | 1.20 | 0.87 (U 0.15) | 69 mm (2.72") | n/p | 4; E900; C5 or B5 |
| Heroal W 72 | benchmark | 72 mm (2.83") | 1.30 | 0.84 (U 0.15) | 66 mm (2.60") | 90 mm (3.54") | 4; 9A; C5 or B5 |
Provider-published catalog values, accessed 2026-10-30. Uw is the metric whole-window value for the provider's reference configuration, converted in brackets with U = Uw x 0.176; it is not an NFRC rating of a supplied unit. n/p = not published.
The aluminum flagships span less than 1 in, from 2.76 in (70 mm) on Cortizo COR 70 Hidden Sash to 3.54 in (90 mm) on Schuco AWS 90.SI+. Depth alone does not rank them: MasterLine 8 is 3.03 in (77 mm) deep but takes the thickest glass in the chart, 2.83 in (72 mm).
The uPVC table adds chamber count and reinforcement; the uPVC systems comparison takes these platforms pair by pair.
| Platform | Status | Frame depth | Chambers | Reinforcement | Uf (W/m2K) | Best Uw (W/m2K) | Max glazing |
|---|---|---|---|---|---|---|---|
| Aluplast Ideal Neo | I quote it | 85 mm (3.35") | 6 | n/p | n/p | 0.74 (U 0.13) | 52 mm (2.05") |
| Schuco LivIng 82 | benchmark | 82 mm (3.23") | 7 | steel | 0.96 | n/p | 52 mm (2.05") |
| Rehau GENEO | benchmark | 86 mm (3.39") | 6 | glass fibre | 0.76 | 0.66 (U 0.12) | 53 mm (2.09") |
| Rehau SYNEGO | benchmark | 80 mm (3.15") | 7 | steel | 0.94 | 0.71 (U 0.12) | 51 mm (2.01") |
| Veka SOFTLINE 82 MD | benchmark | 82 mm (3.23") | 7 | steel | 0.94 | 0.74 (U 0.13) | 54 mm (2.13") |
| Veka SOFTLINE 70 AD | benchmark | 70 mm (2.76") | n/p | n/p | 1.30 | n/p | 42 mm (1.65") |
| Kommerling 76 MD | benchmark | 76 mm (2.99") | n/p | n/p | 1.00 | n/p | 60 mm (2.36") |
| Kommerling 88 MD | benchmark | 88 mm (3.46") | 7 | n/p | 0.93 | n/p | 60 mm (2.36") |
| Gealan S 9000 | benchmark | 82.5 mm (3.25") | 6 | steel | 0.89 | 0.72 (U 0.13) | 58 mm (2.28") |
| Gealan LINEAR | benchmark | 74 mm (2.91") | n/p | n/p | 1.00 | 0.73 (U 0.13) | 50 mm (1.97") |
| Deceuninck Elegant (ThermoFibra) | benchmark | 76 mm (2.99") | 6 | glass fibre | 0.85 | 0.59 (U 0.10) | 70 mm (2.76") |
| Salamander bluEvolution 82 | benchmark | 82 mm (3.23") | n/p | steel | 0.98 | 0.73 (U 0.13) | 60 mm (2.36") |
| Salamander bluEvolution 92 | benchmark | 92 mm (3.62") | 6 | n/p | 0.90 | 0.70 (U 0.12) | 60 mm (2.36") |
Provider-published catalog values, accessed 2026-10-30. Uw converted in brackets with U = Uw x 0.176 - a metric catalog value, not an NFRC rating of a supplied unit. n/p = not published.
Twelve of the 13 uPVC platforms in the chart are 2.91 to 3.62 in (74 to 92 mm) deep; Veka SOFTLINE 70 AD is the one outlier at 2.76 in (70 mm). Two use glass-fibre reinforcement rather than steel as standard: Rehau GENEO and Deceuninck Elegant with ThermoFibra.
The sliding table lists panel weight and height limits, which decide whether a large opening fits one panel or needs two.
| Sliding system | Status | Material | Frame depth | Best Uw (W/m2K) | Max glazing | Max panel weight | Max panel height |
|---|---|---|---|---|---|---|---|
| Reynaers Hi-Finity | I quote it | aluminum | n/p | 0.80 (U 0.14) | 54 mm (2.13") | 600 kg (1,323 lbs) | 4,000 mm (157") |
| Reynaers MasterPatio | I quote it | aluminum | 180 mm (7.09") | 0.80 (U 0.14) | 62 mm (2.44") | 600 kg (1,323 lbs) | 3,600 mm (142") |
| Aluprof MB-77HS | I quote it | aluminum | 174 mm (6.85") | 0.96 (U 0.17) | 58.5 mm (2.30") | 400 kg (882 lbs) | 3,200 mm (126") |
| Aluprof Skyline | I quote it | aluminum | 190 mm (7.48") | 0.80 (U 0.14) | 60 mm (2.36") | 700 kg (1,543 lbs) | 4,000 mm (157") |
| Aliplast Ultraglide | I quote it | aluminum | 153 mm (6.02") | 1.00 (U 0.18) | 52 mm (2.05") | 440 kg (970 lbs) | n/p |
| Aliplast Visoglide Plus | I quote it | aluminum | 160 mm (6.30") | 1.10 (U 0.19) | n/p | n/p | 2,700 mm (106") |
| Cortizo COR Vision | I quote it | aluminum | 116 mm (4.57") | 1.30 (U 0.23) | 30 mm (1.18") | 320 kg (705 lbs) | 3,000 mm (118") |
| Cortizo COR Vision Plus | I quote it | aluminum | 180 mm (7.09") | 0.90 (U 0.16) | 56 mm (2.20") | 400 kg (882 lbs) | 4,000 mm (157") |
| Aluplast Smart-Slide NEO | I quote it | uPVC | 154 mm (6.06") | 0.95 (U 0.17) | 54 mm (2.13") | n/p | n/p |
| Schuco ASE 80.HI | benchmark | aluminum | 180 mm (7.09") | 0.99 (U 0.17) | 60 mm (2.36") | 500 kg (1,102 lbs) | 3,500 mm (138") |
Provider-published values, accessed 2026-10-30. Panel weights are for manual operation where the provider lists a higher motorized limit. Uw converted in brackets with U = Uw x 0.176 - not an NFRC rating. n/p = not published.
Reynaers windows
Reynaers is a family-owned Belgian aluminum system provider, founded in Duffel in 1965, with offices in 40 countries. The core window platform is MasterLine 8: 3.03 in (77 mm) deep, glass up to 2.83 in (72 mm), best U-0.16 (Uw 0.88 W/m2K), sashes up to 110 in (2,800 mm) high and 441 lbs (200 kg). MasterLine 10 is 3.82 in (97 mm) deep with Uf 0.94 W/m2K and best U-0.14 (Uw 0.78). SlimLine 38 has a 2.22 in (56.5 mm) sightline, and Hi-Finity slides panels up to 157 in (4,000 mm) high and 1,323 lbs (600 kg). See the Reynaers systems.
Aluprof windows
Aluprof is a Polish aluminum system provider in Bielsko-Biala, owned by the Warsaw-listed Grupa Kety since 2006 and exporting to over 60 countries. MB-86 is 3.39 in (86 mm) deep with Uf 0.74 W/m2K and best U-0.11 (Uw 0.60), the lowest value among the aluminum platforms in this guide. MB-79N is the 2.76 in (70 mm) window platform with Uf 0.70 and best U-0.11 (Uw 0.64). Skyline slides panels up to 1,543 lbs (700 kg) and 157 in (4,000 mm) high with a 0.98 in (25 mm) central mullion. The full range is on the Aluprof page. A Polish system provider is not the same as a Polish window maker: the finished units are built by fabricators, which I explain in Polish windows for US and Canadian projects.
Aliplast windows
Aliplast is an aluminum system provider from Lokeren, Belgium, producing systems since 1984 and part of the Corialis Group. Genesis 75 is 2.95 in (75 mm) deep with Uf 0.84 W/m2K and best U-0.15 (Uw 0.85), class 4 air, E1200 water and C5 wind. Max Light, also 2.95 in deep, takes glass up to 2.68 in (68 mm) with best U-0.16 (Uw 0.90). Ultraglide lift-and-slide carries panels up to 970 lbs (440 kg). The Aliplast page lists every system I quote.
Cortizo windows
Cortizo is a family-owned Spanish system provider from Padron, founded in 1972, selling in 87 countries from 9 factories. Its signature window is COR 70 Hidden Sash: 2.76 in (70 mm) deep, best U-0.15 (Uw 0.84 W/m2K), sashes up to 138 in (3,500 mm) high and 353 lbs (160 kg), with the operable sash hidden behind the frame from outside. COR Vision Plus is the large slider: a 0.79 in (20 mm) central junction and panels up to 157 in (4,000 mm) and 882 lbs (400 kg). See the Cortizo systems.
Aluplast windows
Aluplast is a family-owned German uPVC system provider, founded in 1982 and based in Karlsruhe, with a company in the USA. Ideal Neo is 3.35 in (85 mm) deep with 6 chambers and best U-0.13 (Uw 0.74 W/m2K) triple glazed. Ideal Neo OUT is the same platform as an outward-opening casement with steel reinforcement and an integrated nailing fin. Smart-Slide NEO is the 6.06 in (154 mm) sliding door. Everything is on the Aluplast page.
Schuco windows
Schuco is a German system provider founded in 1951 and based in Bielefeld, part of the Otto Fuchs group, active in more than 90 countries; it is a benchmark, not a system I quote. It runs aluminum (AWS windows, ASE sliders) and uPVC (LivIng) under one brand. AWS 75.SI+ is 2.95 in (75 mm) deep with Uf 0.90 W/m2K and best U-0.16 (Uw 0.90); AWS 90.SI+ is 3.54 in (90 mm) with Uf 0.71 and best U-0.14 (Uw 0.80). LivIng 82 is a 3.23 in (82 mm), 7-chamber, steel-reinforced uPVC profile with Uf 0.96.
Rehau windows
Rehau is a family-owned polymer group headquartered in Muri, Switzerland, founded in 1948 in Rehau, Bavaria; window profiles are one of several business units, and it is a benchmark, not a system I quote. GENEO is 3.39 in (86 mm) deep with 6 chambers and glass-fibre reinforcement, Uf 0.76 W/m2K and best U-0.12 (Uw 0.66); Rehau states a Passive House certified GENEO PHZ variant. SYNEGO is 3.15 in (80 mm), 7 chambers, steel reinforced, Uf 0.94 and best U-0.12 (Uw 0.71).
Veka windows
Veka is a family-owned uPVC system provider from Sendenhorst, Germany, built on a company Heinrich Laumann took over in 1969, with 54 locations on four continents and a US subsidiary since 1983; it is a benchmark, not a system I quote. SOFTLINE 82 MD is 3.23 in (82 mm) deep with 7 chambers and steel reinforcement, Uf 0.94 W/m2K and best U-0.13 (Uw 0.74). SOFTLINE 70 AD is the 2.76 in (70 mm) platform with Uf 1.3.
Kommerling windows (profine)
Kommerling was founded in Pirmasens, Germany, in 1897 and today belongs to the owner-managed profine Group, alongside KBE and TROCAL; it is a benchmark, not a system I quote. The 88 MD platform is 3.46 in (88 mm) deep with 7 chambers and Uf 0.93 W/m2K; 76 MD is 2.99 in (76 mm) with Uf 1.0. Both take glass up to 2.36 in (60 mm). A best Uw is not published for either in the sources I used.
Gealan windows
Gealan is a uPVC system provider from Oberkotzau, Germany, founded in 1921 and part of the VEKA Group, which makes it Veka's sister company; it is a benchmark, not a system I quote. S 9000 is 3.25 in (82.5 mm) deep with 6 chambers and steel reinforcement, Uf 0.89 W/m2K and best U-0.13 (Uw 0.72). LINEAR is 2.91 in (74 mm) with Uf 1.0 and best U-0.13 (Uw 0.73).
Deceuninck windows
Deceuninck is a Belgian provider from Hooglede-Gits, founded in 1937 and listed on Euronext Brussels, making PVC, aluminum and composite systems; it is a benchmark, not a system I quote. Elegant with ThermoFibra glass-fibre reinforcement is 2.99 in (76 mm) deep with 6 chambers, Uf 0.85 W/m2K and best U-0.10 (Uw 0.59), the lowest value in the uPVC table. It takes glass up to 2.76 in (70 mm) and comes in 40 foil colors.
Salamander windows
Salamander Window & Door Systems is a family-owned uPVC provider in Turkheim, Germany, on a site dating from 1917, and is unrelated today to the shoe brand it grew out of; it is a benchmark, not a system I quote. bluEvolution 92 is 3.62 in (92 mm) deep, the deepest uPVC platform here, with 6 chambers, Uf 0.90 W/m2K and best U-0.12 (Uw 0.70). bluEvolution 82 is 3.23 in (82 mm) with steel reinforcement and best U-0.13 (Uw 0.73).
Wicona windows
Wicona is an aluminum system provider from Ulm, Germany, founded in 1948 and part of Hydro, with operations in 48 countries; it is a benchmark, not a system I quote. WICLINE 75 evo is 2.95 in (75 mm) deep with Uf 1.2 W/m2K and best U-0.15 (Uw 0.87), glass up to 2.72 in (69 mm) and sashes up to 661 lbs (300 kg). Wicona also makes doors, sliders and facades.
Heroal windows
Heroal is an owner-managed family business from Verl, Germany, with roots going back to 1874 and aluminum roller shutters since 1969; it is a benchmark, not a system I quote. W 72 is 2.83 in (72 mm) deep with Uf 1.3 W/m2K and best U-0.15 (Uw 0.84), glass up to 2.60 in (66 mm) and sashes up to 661 lbs (300 kg). Heroal also makes roller shutter and sun-protection systems.
Wood and real steel
The timber lines I quote carry house names: Timber Classic and Timber Estate in solid laminated wood, Clad Flush, Clad Hidden Sash and Clad Passive in aluminum-clad wood, and Timber Lift & Slide for large doors. Clad Passive is 4.86 in (123.5 mm) deep with a converted European reference from about U-0.11, not an NFRC rating.
Real steel does have a system provider: Jansen of Switzerland, whose Janisol profiles are built into doors and windows by an independent steel fabricator. Janisol HI is 3.15 in (80 mm) deep for doors and fixed glazing and 3.54 in (90 mm) for window sashes, with a frame U-factor from about 0.13 per Jansen documentation. Real steel is quoted from drawings only, and the steel windows and doors guide explains when it fits.
How to read a provider's catalog
A provider catalog gives three different thermal numbers, and only one of them describes a whole window. Uf is the frame alone; Uw is the whole window at the provider's reference size and glass (Rehau uses about 48 x 58 in, 1,230 x 1,480 mm, for its GENEO figure); and the U-factor a US permit reads is an NFRC rating of a specific assembly. Multiply Uw by 0.176 to get a U-factor in Btu/h-ft2-F - the Uw to U-factor converter does it for you - but the result is a metric catalog value, not an NFRC rating. Where a permit needs a rated unit, I confirm the documentation for the exact assembly, as explained in NFRC and NAFS for European windows.
The classes come from EN tests: air permeability under EN 12207 (class 4 is the top class), watertightness under EN 12208 (9A, or E900 and above), and wind load under EN 12210 (C5 or B5 at the top). Max sash height and weight tell you whether your largest opening fits the platform before anyone draws it. Price is not in a catalog; the European window cost guide covers budget ranges.
For projects in Canada
For a Canadian project, the provider's metric values matter more: Canadian codes express whole-window U in W/m2K (or as an Energy Rating), so a catalog Uw such as U-0.13 (0.74 W/m2K) on Ideal Neo is already in your code's unit, though still at a reference size. EU-origin aluminum, wood, aluminum-clad wood and uPVC windows enter Canada duty-free under CETA with an origin declaration on the invoice. Origin follows where the unit is fabricated, not where the system provider is headquartered, so I confirm country of origin per order. GST of 5% applies at import and is recoverable for GST-registered businesses; Canadian orders ship DAP with the Canadian buyer as importer of record. Code documentation is confirmed per project with your building official, real steel terms likewise, and the Canada page covers the process.
FAQ
Who makes Reynaers windows? Reynaers, a family-owned Belgian company founded in 1965, designs the aluminum profiles; independent fabricators build the finished windows, and whoever sells you the unit holds the warranty.
Is Schuco better than Reynaers? Not across the board. Schuco AWS 90.SI+ is 3.54 in (90 mm) deep with Uf 0.71 W/m2K and best Uw 0.80; Reynaers MasterLine 10 is 3.82 in (97 mm) deep with Uf 0.94 and best Uw 0.78. One step down, AWS 75.SI+ has best Uw 0.90 and MasterLine 8 has 0.88. Choose by the configuration, opening sizes and documentation your project needs. The aluminum head-to-head comparison goes deeper.
What is the largest window system provider in Europe? Providers do not publish comparable window volumes, so no sourced ranking exists. The figures they do publish measure different things: Schuco reports 2.06 billion euros of 2025 turnover, Rehau around 20,000 employees across all its polymer units, and Veka around 7,000 employees.
Which European window brands are German? Of the 14 providers here, 8 are headquartered in Germany: Aluplast, Schuco, Veka, Kommerling, Gealan, Salamander, Wicona and Heroal. Rehau was founded in Bavaria and is now headquartered in Switzerland.
Do you offer Schuco, Rehau or Veka? No. I quote Reynaers, Aluprof, Aliplast and Cortizo in aluminum and Aluplast in uPVC, and I can price a schedule drawn around a benchmark system on the closest platform I quote.
Send me the window schedule or drawings through the quote page and I will price it on the systems that fit, or start with a budget range in the estimator.