About Rockfon Blanka
A 20mm stone wool tile with a deep matt, very white face that holds up well to dirt and wear. It has one of the widest choices of edges and formats in the Rockfon range, from standard lay-in A and E edges to concealed, bandraster and adhesive-fixed versions, which makes it a common pick for offices, healthcare and education.
Key performance
| Sound absorption | αw: up to 1.00 (Class A) |
|---|---|
| Reaction to fire | A1 |
| Light reflection | 87% light reflection, >99% light diffusion |
| Wet-scrub resistance | Class 4 |
| Room to room sound insulation | Dn,f,w = 26 dB; Dn,f,w with Rockfon Acoustimass = 40 dB |
| Impact resistance | Class 3A (edge Z or M) |
| Humidity and sag resistance | Up to 100% RH. No visible deflection in high humidity C/0N |
| Cleaning | Vacuum; Damp cloth |
Source: Rockfon Blanka datasheet, 04.2026. Figures quoted exactly from the manufacturer's datasheet; confirm with Rockfon before specifying.
Acoustic performance
| Edge / Thickness (mm) / Suspension (incl. tile - mm) | αw | Absorption class | NRC |
|---|---|---|---|
| A,E: 20-25 / 200 | 1.00 | A | 1.00 |
| Other edges: 20-25 / 200 | 0.95 | A | 0.95 |
| Other edges: 20 / 20 | 0.55 | D | 0.70 |
Selected rows; full table in the technical datasheet.