The Loft Leg XL is a unique solution to avoid insulation compression when using your new build home's loft for storage. Creates a raised loft floor above up to 400mm of quilt insulation Avoids insulation compression saving energy and money Strong enough to walk on and store up to 25Kg per square metre* Manufactured in the UK from recycled materials Manufactured and tested to exceed BS EN 1991-1-1:2002 Government guidelines recommend that we insulate with 270mm of quit insulation to achieve a U value of 0.16W/m2K However new build homes can be installed with up to 400mm of insulation to meet stricter insulation targets. Thermal studies have shown that compressing your insulation can reduce its thermal properties by more than 50%. A 300mm Loft Leg XL fixed on top of a 100mm truss or ceiling joist provides a cost-effective solution.Developed by a team of engineers and designers the Loft Leg XL is strong, lightweight, and easy to install. The Loft Leg is manufactured in the UK from recycled polypropylene to ISO9001 standards and has been mechanically tested by independent experts. *LOADING LIMIT OF EXISTING CEILING STRUCTURE SHOULD BE CONFIRMED BY A STRUCTURAL ENGINEER. How many do I need? The number of Loft Leg XLs you will need depends on the type of loft boards you are using, the distance between your ceiling joists, and the area you wish to cover. Use the calculator in the images section to see how many you need. This listing is for 1 box of 12 Loft Leg XL's