| 
 | 
Definition of Protection course
1. Noun. (construction) A sacrificial material used to shield a waterproofing material from damaging external forces. ¹
¹ Source: wiktionary.com
| 
 | 
1. Noun. (construction) A sacrificial material used to shield a waterproofing material from damaging external forces. ¹
¹ Source: wiktionary.com