Damp proof course 7.5 Cm thick cement concrete 1:2:4 with 2 coats of bitumen 20/30 penetration at 1.65 Kg per sqm laid hot and sanded
Damp proof course 7.5 Cm thick cement concrete 1:2:4 with 2 coats of bitumen 20/30 penetration at 1.65 Kg per sqm laid hot and sanded