ROCKWOOL Ltd, the leader in stone wool insulation, presents the HARDROCK Multi-Fix Dual Density (DD) board, which is capable of providing significant time and cost savings for contractors as it delivers a comprehensive and effective acoustic, fire safety and thermal insulation solution across a vast range of flat roof applications.
HARDROCK Multi-Fix (DD) can be securely installed within mechanically fixed systems with just a single fixing, compared to the multiple fixings typically used with PIR / PUR foam board installation, and also eliminates the need for additional layers to meet flat roof acoustic specifications.
As a result, contractors using HARDROCK Multi-Fix (DD) can reduce the complexity of installation, cutting time and cost on typical single and dual layer, mechanically fixed and fully bonded roof projects.
“Contractors can save an estimated 12-15% per m2 on the cost of installation when using HARDROCK® Multi-Fix (DD). This applies to a 0.25W/m2K single layer and 0.18W/m2K dual layer, mechanically fixed roof solution with a required acoustic performance of Rw 35dB (single) and 39dB (dual layer), and Class C sound absorption,” says Paul Barrett, Product Manager at ROCKWOOL. “On a large flat roof project, such as a school, hospital, or leisure development, these reductions can equate to tens of thousands of pounds.”
Supplied in a choice of eight single and dual layer option thicknesses with U-values ranging from 0.10 W/m²K to 0.25 W/m²K, HARDROCK® Multi-Fix (DD) is exceptionally versatile and ideally suited for liquid applied, bonded single ply / EPDM, torched bitumen and green roof systems. It can also be used with various adhesives, helping to simplify specification and installation still further.
As a stone wool insulation solution, HARDROCK Multi-Fix (DD) is renowned for its excellent acoustic properties. It has been fully tested to meet the rigorous demands of Building Bulletin 93, The Acoustic Design for Schools, an extension to Part E of the Building Regulations, which sets the standard for ambient, impact and reverberation noise in educational buildings.
HARDROCK Multi-Fix (DD) also provides the highest fire safety rating of any flat roof board insulation on the market with a Euroclass (A1) non-combustible fire classification and LPCB approval (LPS 1181: Part 1 (Ext-A)). This is especially important for contractors keen to reduce the risks associated with “hot works” applications and ensure compliance with Building Bulletin 100, the Zurich Insurance School and Academy design guide, requiring the use of non-combustible materials.
Supplied for rapid 48 hour delivery to site through ROCKWOOL’s extensive UK distribution network, HARDROCK Multi-Fix (DD) is supported by ROCKWOOL’s Technical Solutions support team to provide detailed advice, BIM modelling and ensure optimum value engineering for all projects.
