Cavity Wall Insulation

Redplug is a specialist and approved installer of Rockwool Cavity Wall Insulation (CWI)

Redplug installs cavity wall insulation to a range of projects for thermal, fire spread and soundproofing solutions in both masonry and timber framed projects. We don’t offer CWI for domestic properties but do cover refurbishment, retrofit and new build structures for a range of builders, developers and principle contractors in addition to direct instructions from commercial clients. We offer installations to suit your personal operational circumstances including out of office hours, weekends & holiday working.

Our Rockwool CWI product is typically installed with full compliance of the manufacturer’s BBA certification however Redplug offers no warranty scheme for installations.

If you are interested in using our blown insulation service, please email your requirements and a contact telephone number to We will usually reply within 24 hours.

Please take a look at the other blown insulation solutions across our website.

Finally, please take a look at our twitter feed for recent examples of blown insulation installations @mickredplug or take a look at the videos on our website at

Rockwool 4-in-1 benefits




Fire proof




Energy Saving

Clients we've worked with