A total of nearly 300m3 of perlite lightweight screed was placed on the roof of the new Johannesburg Surgical Hospital in Northcliff by Gothic Construction to insulate the concrete roof deck and provide lightweight slopes-to-fall.
The perlite screeds were topped with a conventional screed to handle the installation of industrial air-conditioning units on the roof.
CemteQ’s construction-grade exfoliated perlite is used as a versatile aggregate for screeds and concrete for its excellent lightweight, thermal insulation, sound dampening and fire protection properties. It is supplied loose in 100l bags with a loose bulk density of 80-120kg/m2.
Stanton Construction Chemical’s GripGuard cementitious waterproofing was placed on top of the screed.