The 4m x 3m Mercia Harlow Insulated Garden Room features a unique wing design that will create a stunning feature in your garden. Its made for all-year use thanks to the 100mm thick double-skinned walls containing Eco-quilt multi-foil insulation. The key features include:. *Free Home Installation *14mm double glazed windows with 2top opening front windows and 2 fixed side windows *Ultra-modern wing design *EcoQuilt insulated walls and roof *Air Tec Insulated floor *Customisable design *16mm Tongue and groove floor *Solid Sheet Board Interlocking Tongue and Groove Roof *10-year anti-rot guarantee