Flexible edge ensuring a perfect fit

ROCKWOOL FLEXI® is a multi-use, dual purpose thermal and acoustic insulation product with a unique flexible edge along one side. The patented flexible edge ensures a perfect fit is maintained between the product and its supporting framework for easy installation and optimum effectiveness.


  • Patented ‘Flexi’ edge offers accurate fit to all widths
  • Will not slump, even if studs shrink
  • Fits all typical metal and timber frame spacing
  • Excellent thermal, acoustic and fire properties
  • Non-combustible (Euroclass A1)
  • Fast and easy to handle and install

Technical information

Dimensions400mm & 600mm x 1200mm
Thickness50mm - 200mm
Thermal ConductivityThermal - 50mm - 120mm, 0.038 W/mK // Acoustic - 140mm - 200mm, 0.035 W/mK
Acoustic PropertiesAchieves Part E (resistance to sound) when installed in accordance to ROCKWOOL guidelines
Fire PropertiesEuroclass A1
Water RepellencyWater Repellent
Vapour ResistivityNegligable
EnvironmentalZero ODP & GWP
StandardsBS EN 13162, ISO 14001: 2004