Loftzone solves some serious building challenges

  • Homebuyers want to use the loft for storage
  • CDM requires safe raised access in the loft space
  • Part L requires deep insulation
  • Part P requires cables to be raised above the insulation
  • Loftzone is the only one solution to all of these


Although many house builders have historically discouraged buyers from using their loft for storage, the British Standard for roof trusses (BS5268) permits up to 25kg/m2 of storage plus the weight of one person (assumed to weigh up to 180kg) accessing the belongings. As such, it is no surprise that homeowners routinely use their loft for storage and, as a result, typically squash their insulation. However, tests by the National Physical Laboratory found that compressing insulation down to joist height reduces its effectiveness by at least 50%, thereby at least doubling the heat lost.

Safe Maintenance Access.

It has long been a legal requirement for new house builders to provide safe access pathways to equipment in the loft that will need maintenance, for example MVHR units, solar inverters and gas boilers, and recently this requirement has been strengthened with the Construction Design and Management Regulations 2015, which states that “designers must consider their designs and any potential risks which may affect those who may maintain or clean the building once it is built”. At the same time, the loft must be insulated to at least 0.13 U-value and it is against Part L1A of the English 2013 Building Regulations to use raised timber battens to raise the safe access path above the insulation, without taking account for the cold bridging through the wood which changes the SAP score for the roof. This poses a major challenge to house builders, since using raised timber battens was hitherto the standard industry practice.

LoftZone StoreFloor uniquely solves this problem, in a way that is designed for new build. The product forms the structure for a safe access deck above up to 350mm of insulation, without causing cold bridging, and is cheaper and faster to install than timber anyway. LoftZone StoreFloor has passed all required industry tests and is the only raised loft floor system that is BBA certified. For U-values requiring more than 350mm of conventional insulation, one layer of timber cross-battens can be laid to raise up the LoftZone supports, or insulation of a higher thermal resistance used.

Providing Storage Space in the Loft

LoftZone StoreFloor uniquely allows new home builders to safely allow house buyers to use their loft space for storage, in a way that has passed all required tests, and even for modern truss roof properties. In fact, the lattice-beam structure of the product strengthens the joists. Direct sales to homeowners is one of the biggest markets for StoreFloor, but it may also be offered as a costed option by the homebuilder, prior to the purchaser moving in.

CPD on lofts

Members of the Chartered Institute of Architectural Technicians can gain one hour’s Continuous Professional Development by viewing an online training course provided by LoftZone on the In-Use factors affecting the practical performance of loft insulation. Click on the logo below to access the course.

CIATCPD Certified