The exterior insulation.
Effective external wall insulation can considerably enhance the thermal and acoustic performance of a building. The ROCKWOOL EWI Dual Density Slab is a stone wool insulation which has been specifically developed for use in external wall insulation systems.
![The ROCKWOOL Red Book, Press Release Image [Correct Web Size]](https://cdn01.rockwool.co.uk/dam.papirfly/illustrations/rw-uk/20200813_rw-uk_illu_05?f=20200829160158&width=752&format=LandscapeTiny)
