Damp proof course 2.5 cm thick of cement concrete 1 : 2 : 4 with two coats of bitumen 20/30 penetration @1.65 kg per sqm laid hot and sanded.
Damp proof course 2.5 cm thick of cement concrete 1 : 2 : 4 with two coats of bitumen 20/30 penetration @1.65 kg per sqm laid hot and sanded.