Sundolitt XPS 300 (extruded polystyrene) has been used to form the core of a waterproof, load-bearing, high insulation roof system at the £75m South St Andrew Square development in the heart of Edinburgh’s historic ‘New Town’ area.
Following the demolition of the former B-listed building on the site, the 190,000ft² mixed office, retail and residential scheme – expected to be completed by the end of this year – features a bold collaborative design from CDA and Gareth Hoskins Architects which won the backing of the City of Edinburgh planners for its “high-quality contemporary architectural expression.”
According to Bryan Mawer, sales manager for Sundolitt XPS, the cost-effective material is designed for inverted roofing applications alongside its established use in flooring where its load-bearing and high thermal performance are critical.
He commented: “We are proud to play a part in this exceptional architectural statement in a prestigious location in Edinburgh. XPS ticks all the boxes for this kind of roofing installation – it’s a lightweight product, yet provides a high strength solution which is very easily transported to site where it can be used as a site-ready, weather resistant insulant.”
Sundolitt XPS is manufactured in a wide range of thicknesses and sheet sizes, the primary range having a thermal conductivity of 0.033 – 0.037 W/mK (EN 13164).
According to the type of use, it achieves a compression resistance from 200 – 700 kPa (EN826) and offers exceptionally low moisture absorption through its closed-pore system – making it an ideal thermal insulator for a wide range of commercial and domestic construction applications.