- Variants
- 3
- Thickness range
- 98–120 mm
- Documented EI
- EI 60 / EI 120
- Documented Rw
- 54–57 dB
DECISION SHEET
When to choose W112
Best suited to
The balanced W11 option: two boards per side to add mass, robustness and performance without moving to a three-layer wall.
Compare first with
W112 adds one layer per side over W111; W113 is the alternative where a heavier three-layer build-up is required.
Critical site checks
- ✓For fire-rated variants, use 250 mm screw spacing and fully treat the joints in every layer.
- ✓Do not claim certified fire resistance for walls boarded horizontally.
- ✓Keep the documented board, stud width, layer count and screw specification together as one build-up.
Available W112 variants
Choose a specific build-up to open the quantity report with that system already loaded. Only performance values published by the associated technical source are displayed.
| Build-up | Thickness | Boards | Frame | Fire | Acoustic | Max. height | Calculate this variant |
|---|---|---|---|---|---|---|---|
| W112 · 98 mm2 × boards per face | 98 mm | 2 × Knauf Standard A board 12,5 | Knauf stud and channel 48 | EI 60 | Rw 54 dB | 3.1 m | Calculate this variant |
| W112 · 120 mm2 × boards per face | 120 mm | 2 × Knauf Standard A board 12,5 | Knauf stud and channel 70 | EI 60 | Rw 55 dB | 4 m | Calculate this variant |
| W112 · 120 mm2 × boards per face | 120 mm | 2 × Knauf Diamant board 12,5 | Knauf stud and channel 70 | EI 120 | Rw 57 dB | 5 m | Calculate this variant |
How to choose a W112 variant
Selection depends on stud width and board type. The documented Diamant build-up provides higher performance than the loaded Standard variants when installed as a complete system.
Current technical source loaded
W11.es Tabiques Knauf con estructura metálica (2026) · 2026-07The Ferragut quantity report prepares
- ✓Boards on both faces
- ✓Compatible studs and channels
- ✓Cavity insulation
- ✓Screws for every layer
- ✓Tape, compound and acoustic seal
What this system family contains
The composition comes from the loaded variants and identifies the work items involved before preparing the quantity report.
Questions about Knauf W112
What is the Knauf W112 system?
W112.es combines a single frame with two Knauf boards on each side. Its build-ups can increase acoustic, mechanical and fire performance.
Which W112 variant should I choose?
Selection depends on stud width and board type. The documented Diamant build-up provides higher performance than the loaded Standard variants when installed as a complete system.
What does the calculator quantify?
The tool estimates complete purchase units for boards, profiles, insulation, screws, joint treatment and accessories compatible with the selected build-up.
Where does the technical data come from?
Performance data comes from W11.es Tabiques Knauf con estructura metálica (2026), revision 2026-07. Values that are not published are not inferred.
