Description. Delfstoffenweg 2 NL-6045 JH Roermond . ROCKWOOL® Cavity insulation is a semi-rigid, full-fill insulation solution for masonry cavity wall construction, suitable for use in new builds or extensions. Rockwool International A/S (or AS), also known as the ROCKWOOL Group, is a Danish multinational manufacturer of mineral wool products headquartered in Hedehusene, Greater Copenhagen, Denmark.The company's R&D unit, employing 100 people as of 2016, is co-located with the headquarters in Copenhagen.. Rockwool was the world's largest maker of insulation materials in 2009, but had … ROCKWOOL standard details available at www.rockwool.co.uk or contact ROCKWOOL Technical Solutions. Our products specialise in 3 core areas including Thermal, Fire and acoustics. "+t,sampleRate:100,tags:n,data:{baseData:{ver:2}}}}var h=d.url||y.src;if(h){function a(e){var t,n,a,i,r,o,s,c,p,l,u;g=!0,m.queue=[],f||(f=!0,t=h,s=function(){var e={},t=d.connectionString;if(t)for(var n=t.split(";"),a=0;a