Which is the best PVC profile brand?

This page does not rank brands. The numbers each maker publishes are its own and cannot be compared with each other without the same standard and configuration. Compare offers with the same profile, the same glass and the same installation.

Does the profile brand guarantee a good window?

No. The window is built by a joinery company, which chooses the glass and the hardware, and is then installed. All of that weighs as much as the profile.

What should I ask the installer about the profile?

In writing: the brand and series of the profile, the depth in mm, the class (A, B or C), the Uw of the complete window with the glass in the quote, and the warranty for profile, glass, hardware and installation.

Is VEKA SPECTRAL a window system?

No. According to VEKA, SPECTRAL is a colour finish for the Softline systems, not a profile system.

PVC profile brands: what each maker says

A window quote often carries one name: Rehau, VEKA, Kömmerling, Deceuninck… It is the profile brand, the PVC frame of the window. This page gathers what each maker says on its own pages and data sheets. It is not a ranking, it does not say which to pick, and it has no commercial links.

We read these pages on 23 October 2026. The numbers are the makers’ own. No independent laboratory measured them.

The profile brand is not the window brand

The profile comes from the profile maker. The window is cut, welded and assembled by a joinery company, which picks the glass and the hardware. Then comes the installation. So a well-known profile brand is not a guarantee of quality: the installer, the glass, the hardware and the fitting weigh as much as the profile.

Table: what each maker publishes

Brand	Origin / group	Window systems named	Maker’s numbers	Source
REHAU	Germany. Founded in 1948 in Rehau (Bavaria). Says it is 100% family-owned	GENEO, SYNEGO, Euro-Design 70	GENEO: 86 mm, 6 chambers, Uf 0.89 W/m²K. SYNEGO: 80 mm, 7 chambers in the frame and 6 in the sash, Uf 0.94. Euro-Design 70: 70 mm, 5 chambers, Uf up to 1.3. Class A: not stated	GENEO, SYNEGO, Euro-Design 70, company
VEKA	Germany. Family-owned since 1969	SOFTLINE 70, 76 and 82	70: 70 mm, 5 chambers, Uf 1.3. 76: 76 mm, 5 chambers, Uf 1.1. 82: 82 mm, 7 chambers in the frame and 6 in the sash, Uf 1.0. All three: class A (EN 12608-1). Softline 82, example: Uw 0.8 (EN ISO 10077-1, glass Ug 0.6, 1230 × 1480 mm window)	VEKA catalogue, VEKA Portugal
Kömmerling	Brand of the profine group, headquartered in Pirmasens (Germany). In Portugal since 1982, according to its site	XtremPro 76MD, 76AD, 76MD Zero, AluNext	76MD: 76 mm, 6 chambers, Uf 1.00, Uw from 0.81 (triple glass Ug 0.6, 1230 × 1480 mm window; standard not named). 76AD: 76 mm, Uf from 1.10, Uw from 0.83; chambers not stated	76MD, 76AD, systems, profine
Gealan	Germany. Part of the VEKA AG group since 2014	S 8000	74 mm, 5 or 6 chambers (by version), Uf “up to 1.2”, glass up to 48 mm. Class A: not stated	S 8000, company
Salamander	Germany (Türkheim). Founded in 1917, mostly family-owned	bluEvolution 82 and 92	82: 82 mm, 5 or 6 chambers, Uf 0.98, Uw 0.73. 92: 92 mm, 6 chambers, Uf 0.9, Uw 0.7. Standard not named	82, 92, company
Schüco	Germany (Bielefeld), since 1951. PVC made in Weißenfels	CT 70 AS (PVC)	70 mm, 5 chambers. The system page gives no Uf or Uw	CT 70 AS, PVC, company
Cortizo	Spain (Padrón, A Coruña)	A 70 Batente (also triple seal), A 84, C 70 sliding	A 70 Batente: 70 mm frame, 5 chambers, glass up to 42 mm, Uw from 0.9 (“check typology, size and glass”); no Uf. Brochure: main walls of 3 mm, class A	A 70, data sheet, brochure
Deceuninck	Belgium, founded in 1937	Elegant, Legend, Zendow#neo Premium	Elegant Infinity ThermoFibra: 76 mm frame, 85 mm sash, Uf 0.85, “certified Passive House”; chambers not stated	Elegant, quality, company
aluplast	Germany, family-owned (Seitz family)	IDEAL 4000, IDEAL 7000	4000: 70 mm, 5 chambers, Uf 1.3, Uw 0.99 (triple glass Ug 0.6). 7000: 85 mm, 6 chambers, Uf 1.1, Uw 0.86 (same conditions). International pages, in English	4000, 7000, company

Two names heard in conversation need a note. VEKA SPECTRAL is a colour finish, not a window system. And Euro-Design 60 does not appear on the Portuguese REHAU pages I read; the 70 mm system is called Euro-Design 70.

How to read the numbers

Uf is for the profile. Uw is for the whole window and depends on the glass, the spacer and the size. See thermal insulation of PVC windows.
The numbers are not comparable between makers, unless the standard and the configuration are the same. Of the sources read, only VEKA names the standard (EN ISO 10077) and the test window next to Uw. aluplast gives the glass and the spacer. The others do not.
Even within one brand the numbers change: REHAU shows Uf 0.89 for GENEO on its current page and 0.76 on a data sheet from October 2017. Kömmerling gives, on the same 76MD page, Uw “from 0.81” and “from 0.80”.
Depth and chambers describe the profile design. They do not say how the window will perform once installed.
Class A (EN 12608) was stated only by VEKA and Cortizo. On the other pages it is absent, which does not mean the profile fails it. See profile classes.

What to do with your quote

Ask in writing for the brand and series of the profile, with the exact name (for example “VEKA Softline 70”), and the depth in mm.
Ask for the class of the profile (A, B or C) and the profile maker’s data sheet.
Ask who builds the window. It may be another company, and it may use more than one profile brand.
Ask for the Uw of the complete window, with the glass in the quote, and the standard used.
Ask for the warranty in writing, separately for profile, glass, hardware and installation, and who gives it: the maker or the company. VEKA, for example, says it gives 10 years on white profiles in Europe. See warranties and certificates.

There is no “best” brand here. Compare offers with the same profile, the same glass and the same installation.

What I could not confirm

Which brands are most used in Portugal: there is no official data.
Whether Gealan, Salamander, Schüco (PVC) and aluplast are used by Portuguese companies. I found aluplast on no official Portuguese page and did not see it in a quote.
Whether the profiles meet class A when the page does not mention it.
What they say about lead-free stabilisers: none of the pages read mention it.
The VEKA values come from the VEKA Spain catalogue. The system pages on the Portuguese site do not show them as text.
The Schüco “standard windows” page returned an error, so I do not have the Uf of Schüco PVC. The REHAU site blocks automated readers: check the numbers on the current pages.

Sources

Read on 23 October 2026, all from the makers themselves. The links for each brand are in the last column of the table. In addition:

What to do next

See what the letter A, B or C means in PVC profile classes.
Know what to ask in questions for the installer.
Ask for comparable offers: how to ask for a quote.