Constructional Details of Cavity Walls & Drowing Details

The object of cavity wall is to separate the two leaves, therefore, it is essential to provide the cavity immediately above the horizontal D.PC. i.e 150 to 200 above ground level. At the sill level. the sill which may be of stone, cement, concrete or wood, it is extended upto the face of the inner wall. Horzontal D.PC. is also provided above the lintels. The cavity is extended upto bottom or copings in the
parapet. Weep holes are provided to drain off any seepaged water in the cavity

Cavity Walls From Foundation To Parapet & the  Detailed Drowing (see the fig)