Uw value
0.96 W/(m²·K)Technical system data · reviewed 08/2026
Reynaers · aluminum windows
SlimLine 38
Slim steel-look design with high comfort
Slender profiles recall classic steel windows and suit both modern new builds and sensitive renovations. The slim appearance is combined with contemporary thermal insulation.
- System-specific performance data
- Visible revision status
- For architects and specifiers
Profile section
Explore functional zones
01
Profile assembly
Published Uf value 1.90 W/(m²K)Select the three markers to classify the profile assembly, glazing zone, seals and drainage.
01 · System performance
Published data in a transparent technical structure.
Every value remains assigned to its technical category, so thermal performance, dimensions, security, comfort and glazing can be reviewed without mixed marketing claims.
System data sheet
Reynaers SlimLine 38
Revision 08/2026
| Property | System value | Category |
|---|---|---|
| Insulation | ||
| Thermal insulation – Uf | 1.9 W/(m²·K) | Insulation |
| Thermal insulation – Uw | 0.96 W/(m²·K) | Insulation |
| Basis of the Uw calculation | Frame-sash combination with Ug 0.6 W/(m²·K), warm edge, element size 1.23 × 1.48 m, 73 mm sightline and 36 mm glass. | Insulation |
| Comfort | ||
| Airtightness | Class 4 (600 Pa) | Comfort |
| Watertightness | Class 9A (600 Pa) | Comfort |
| Wind load resistance | Category C4 (1600 Pa) | Comfort |
| Acoustics – Rw (C; Ctr) | 45 (−1; −5) dB | Comfort |
| Opening and closing resistance | Class 3 | Comfort |
| Security | ||
| Burglary resistance | PAS 24, RC2 | Security |
| Fire safety | EI2 30, EW 30 | Security |
| Maximum Dimensions & Weights | ||
| Sash height | 600–2800 mm | Maximum Dimensions & Weights |
| Sash width | 450–1700 mm | Maximum Dimensions & Weights |
| Max. sash weight | 170 kg | Maximum Dimensions & Weights |
| Sightlines & profile depths | ||
| Frame sightline, inward-opening | 33.5 mm | Sightlines & profile depths |
| Sash sightline, inward-opening | 23 mm | Sightlines & profile depths |
| Combined frame/sash sightline, inward-opening | 67 mm | Sightlines & profile depths |
| Frame sightline, outward-opening | 29 mm | Sightlines & profile depths |
| Sash sightline, outward-opening | 60.5 mm | Sightlines & profile depths |
| Combined frame/sash sightline, outward-opening | 80 mm | Sightlines & profile depths |
| Profile depth, frame/sash | 99 / 86 mm | Sightlines & profile depths |
| Profile depth, outer frame/sash | 99 mm | Sightlines & profile depths |
| Glazing | ||
| Glass entry | 13.5 mm | Glazing |
| Glazing method | Dry or wet glazing, interior glazing or glazing bead | Glazing |
| Glass thickness, sash | 16–55 mm | Glazing |
Values are taken from the system-specific data already maintained on this website. The binding result is produced from the actual unit configuration.
02 · Profile construction
From profile section to verified project planning.
Profiles, glazing, seals and hardware are treated as one system. This separates published values from the items that require project-specific verification.
System platform
profile-dependent frame depth or profile-dependent construction.
Planning: frame, sash, mullion and meeting stileGlazing
Published range: 16–55 mm.
Planning: build-up, weight, size and spacerSeals and drainage
Air: Class 4 (600 Pa) · Water: Class 9A (600 Pa).
Planning: exposure and drainageHardware and security
Burglary resistance: PAS 24, RC2.
Planning: opening type, weight and tested assembly03 · Interactive tool
Estimate the whole-window U-factor with visible inputs and formula.
The calculator uses the published Uf input for the selected system, the glazing Ug value, the unit geometry and the spacer Ψ value.
Preliminary whole-window U-factorReynaers SlimLine 38
–W/(m²K)
- Window area Aw
- –
- Frame area Af
- –
- Glass area Ag
- –
- Glass-edge length lg
- –
Formula and calculation
Uw = (Af × Uf + Ag × Ug + lg × Ψg) ÷ Aw
Preliminary planning value. Mullions, transoms, divided lites, special geometry, actual profile combinations and applicable project standards must be included in the binding calculation.
04 · Planning resources
CAD, sections and specifications in one logical area.
Existing resources link directly to the relevant content. CAD details that are not yet public can be requested with the selected system already identified.
PDF
System data
Technical data overview
All currently stored performance values
Current data status · 08/2026PDF
Downloads
Product brochures and documents
Available manufacturer resources
Website document libraryCAD
DWG / DXF
Request a CAD section
Coordinate the appropriate configuration and revision
System preselectedTXT
Specification
Request specification text
System-specific text with project parameters
For architects and specifiersNo resources match this filter.
05 · Planning knowledge
Answers organized around real specification questions.
Frequently asked questions remain readable on the page and are also provided as structured FAQ data.
Which values are binding for SlimLine 38?
Only the values of the specifically engineered and verified unit configuration are binding, including profiles, size, opening type, glazing, hardware, anchoring and installation interface.
Which glazing can be used?
The published system range is 16–55 mm. A specific glass build-up also depends on size, weight, sash dimensions, hardware and structural verification.
Is PAS 24, RC2 automatically included?
No. A resistance class only applies to the tested assembly of profiles, hardware, glazing, anchoring and installation. The required class must be specified for the project.
How is the binding whole-window U-factor determined?
From the frame share, Uf value of the actual profile combination, glazing Ug value, glass-edge length, spacer Ψ value and, where applicable, mullions, transoms and special geometry.
From system value to project-specific unit
Enter dimensions. Select the build-up.
Receive a project value.
The configurator connects technical system data with drawings, glazing and a project quotation request.