Kingspan Insulation - Kingspan Insulation Knowledge Base

Mineral fibre in cavity walls

Kingspan Group Kingspan Insulation

Why you should not fully fill cavity walls


Mineral Fibre Batts
Due to their open fibrous structure, poor site practice can encourage water penetration into mineral fibre full batt cavity wall insulation.
  • 1% moisture by volume in man-made mineral fibre insulants can reduce thermal performance by between 75% and 105%.
  • It is reasonable to expect this situation is prevalent for 9 months of the year in the UK.
Download the mineral fibre full fill batt cavity wall insulation, workmanship, water and heat loss White Paper.