DPC or damp proof course is very important in structures to stop the moisture from entering the walls. DPC is usually provided at plinth level.
An effective damp proofing material should have the following properties;
1-It should be impervious.
2-It should be strong and durable and should be capable of withstanding both dead as well as live loads without damage.
3-It should be dimensionally stable.
4-It should be free from deliquescent salts like sulfates, chlorides, and nitrates.
The materials commonly used to check dampness can be divided into the following three categories:
Flexible Materials: Materials like bitumen felts (which may be hessian based or fiber/glass fiber-based), plastic sheeting (polythene sheets), etc.
Semi-rigid Materials: Materials like mastic, asphalt, or a combination of materials or layers.
Rigid Materials: Materials like first-class bricks, stones, slate, cement concrete, etc.
The practical visualization can be viewed in the attached picture.
https://t.me/ethioengineers1
