Bitumen and sacking

Bitumen is an old, high-performance insulator that has stood the test of time over the years. Bitumen and sacking is done in two ways: 1. single layer 2. two layers

Monolayers:

First, a layer of bitumen is spread on the desired surface, then a sack layer is applied on it, and finally a layer of bitumen is spread on the sack. (Sack used to flatten and stabilize bitumen)

double layer:

First, bitumen is spread on the desired surface, then a sack layer is applied on it, in the next step, a layer of bitumen, then a sack layer and finally a layer of bitumen is spread.

The thickness of bitumen and sack is 2 to 3 cm.