The Mercia 4m x 3m Self Build Garden Room is the perfect solution to add more space to your home. A top-quality garden pod with endless possibilities. Top features include:. *Simple design for easy self-assembly *72mm Thick Double Skinned Walls *Fully insulated roof, floor and walls *Interlocking tongue and groove roof and floor *14mm double-glazed windows and doors *10-year anti-rot guarantee