6. Damp proofing below ground level

1. Calculate the brick size 
2. Calculate the course size 
3. Choose the right mortar 
4. Determine the mortar colour 
5. Tilt the bricks 
6. Damp proofing below ground level 
Build the first courses below ground level with normal, solid bricks. In order to prevent rising damp, it is best to place a damp-proof foil between the courses below ground level and the course above it. First apply some mortar on the course below ground level. Apply the foil, then some more mortar and then position the first course of bricks above ground level. Because the damp-proof course is covered in mortar on both sides, it is advisable to have this joint slightly thicker. The thicker joint is usually not visible. If you do decide to use a 4 mm joint here as well for aesthetic reasons, it is recommended to glue the foil on with polymers.
7. Provide a vertical dam 
8. Use closers 
9. Joists and lintels 
10. Expansion joints 
11. Garden or freestanding walls 
12. Flat roofs