Green Roof Case Study - University of Lancashire

Client	University of Lancashire
Architect	Archimedia consulting
Main Contractor
Type of Development	Library Building, Newton Wrigg, Penrith
Reason for Green Roof	Blend in with the local area, whilst reducing pressure on the campus drainage system by water retention.
Type of Roof	Index INSTA Extensive Green Roofing System
Size of Green Roof	800m²
Build up of Roof	*Waterproofing* Vapour Barrier - Index Prominent alu Insulation - Indexzone CFC & HCFC free rigid polyurethane insulation Underlay - Index 5mm Proteaduo SBS/APP composite membrane. Root resistant layer - Index 4mm Defend H anti root membrane (A specially formulated chemical root inhibitor) *Landscaping* Index water retention/drainage mat. Index organic substrate to a depth of 50mm. Index INSTA Extensive Planting System (containing up to10 varieties of sedum) installed in 20m x 1m rolls. Vegetation barrier of 20/40mm washed rounded pebbles.
Comments	A successful project, observations included the amount of water retention whilst the discharge was mimimum
Completion Date	April 2001