Rockwool, the world’s largest producer of stonewool, has launched a new exterior load bearing wall system which integrates high levels of insulation into its design to deliver an energy efficient solution to the Zero Carbon challenge – while keeping wall thickness to a minimum. Passivhaus certified, the system achieves a typical U-Value of 0.143W/m2K, making it an ideal specification for projects targeting superior thermal performance or higher levels of the Code for Sustainable Homes.
A patented modular system with few components, RockShell is delivered to site in ‘kit form’ according to the specified building design. Constructed of I-shaped steel profiles encompassed in heavy Rockwool insulation and an OSB lining on the inside, RockShell is quick and easy to install and requires no specialist equipment. These factors culminate in minimal waste on-site and ultimately time and cost savings for the developer.
By simplifying installation and manufacturing the system to an exact specification, RockShell offers increased air tightness and minimised thermal bridges, as compared with traditional building methods. This is achieved by the interface detail of the components and reducing the risk of installation error on-site.
Matthew Bromley, UK Business Manager for the RockShell Wall System, explains: “In simple terms, RockShell takes the insulation that would traditionally be used for wall cavity insulation and turns it into part of the load bearing structure. In doing so, far superior levels of thermal performance can be achieved without increasing wall thickness. Moreover, as Rockwool stonewool is produced from volcanic Diabase rock, the core component of RockShell is a naturally sustainable material.
“From a compliance perspective, system performance has already been proven with Passivhaus certification, which is why we expect RockShell to be particularly popular with developers that have to meet stringent energy efficiency criteria.”
Suitable for buildings up to two and a half storeys and with most types of foundation, RockShell has also been designed to offer maximum flexibility in building design and simplicity of installation. For example, the system interfaces with many common building components while the exterior can accept most types of finish, such as render and cladding. As a lightweight construction RockShell also reduces health and safety considerations on-site.
As an innovative new system, Rockwool has underpinned the launch of RockShell with comprehensive technical support, which includes a detailed building manual, access to the local technical team for specification guidance and project meetings as well as a free design service.
For further information on the RockShell wall system please visit www.rockshell.uk.com or email rockshell@rockwool.co.uk.
