Veka Softline 70 is a premium system that defines the quality benchmark across the window industry. Where many rivals fall short, this is a true Class "A" profile certified to the DIN EN 12608 standard, meaning its outer wall measures a full 3 mm (±0.2 mm) thick. That extra margin of strength delivers flawless window geometry, rigid corner welds, and durable hardware that stays firmly anchored in the plastic for years.
Built around a five-chamber design with a 70 mm installation depth, the profile forms a formidable shield against both cold and noise. With support for glazing units up to 42 mm thick and the inclusion of premium seals, windows made from the Veka Softline profile turn your home into a genuinely energy-efficient space. It is the right pick for anyone who refuses to compromise on reliability and wants a "fit and forget" solution that lasts the next 50 years.
Brand
Veka — one of the oldest and largest PVC profile manufacturers in the world. The company is known for its signature Softline design with rounded edges and consistently high quality. If you're looking for reliable windows with a classic look — Veka is an excellent choice.
More about VEKATechnical Specifications
The gold standard for rigidity. A Class "A" profile featuring closed reinforcement that delivers outstanding stability together with excellent thermal performance.
Engineering Specifications:
Glazing and Infill Choices:
Profile Geometry and Sizes (Window):
Tested Performance (according to DIN EN 14351-1):
The gold standard for rigidity. A Class "A" profile featuring closed reinforcement that delivers outstanding stability together with excellent thermal performance.
For a standard 2-sash tilt-and-turn window (1200 × 1400 mm) with basic double-glazed unit.
Alternative solutions from other manufacturers
Side by side
How Veka Softline 70 stacks up against the closest matches from other brands.
| Specification | Veka Softline 70This profile | Rehau Euro-design 70 | Schüco Corona CT 70 | WDS 6S (70 mm) |
|---|---|---|---|---|
| Brand | VEKA | REHAU | Schüco | WDS |
| Material | PVC | PVC | PVC | PVC |
| Profile depth | 70mm | 70mm | 70mm | 70mm |
| Chambers | 5 chambers | 5 chambers | 5 chambers | 6 chambers |
| Glass unit, max | up to 42mm | up to 40mm | up to 52mm | up to 40mm |
| Thermal (Uw) | 1.3 | 1.3 | 1.3 | 1.3 |
| Sound (Rw, dB) | ≈45 Rw(dB) | ≈43 Rw(dB) | ≈48 Rw(dB) | ≈40 Rw(dB) |
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FAQs
Softline 70 is a 5-chamber system with a 70 mm build depth and 112 mm combined frame-plus-sash height. Its frame value is Uf 1.3 W/m²K with steel reinforcement, reaching a window Uw ≤ 1.3 W/(m²·K). The frame carries a closed square 30×30 mm steel insert, and a Class "A" outer wall of 3 mm (±0.2 mm) gives stronger corner welds.
The glazing rebate accepts infills from 4 mm to 42 mm, seated in a 21 mm rebate depth that keeps the spacer warmer and limits edge condensation. Supported build-ups include:
Maximum sash sizes are 1500×1500 mm for a window and 1000×2400 mm for a balcony door, with proper static reinforcement, so oversized openings fall outside it. Security tops out at RC3 (with bonded glass and anti-burglary hardware), and the 42 mm glazing limit and Uw ≤ 1.3 ceiling make it unsuited to passive-house targets that need thicker triple units and lower U-values.
Softline 70 is the entry tier at 70 mm / Uw ≤ 1.3. The siblings step up thermally:
It uses two unbroken gasket lines — an 8 mm overlap inside and 7 mm outside — in EPDM or TPE, which stays supple in the cold. The sloped frame and sash rebate channels water outward, and the system is rated Class 4 air tightness, the top level. Tested to DIN EN 14351-1, with an expected service life of over 50 years.
Yes. The 3 mm Class "A" outer wall combined with the closed 30×30 mm steel insert lets the profile absorb the thermal expansion of dark foils under direct sun without bowing — a failure mode common to thinner profiles. The square closed steel core also resists twisting during installation and keeps heavy sashes hanging true.
