Specify the correct mortar in external wall and internal wall surface furnishing. – NABTEB QUESTION

ANSWER

For the external wall surface:

1 part of Portland cement
½ part lime; 44 ½ parts of sand by volume.
1:1:5 to 6 parts cement, lime and sand OR
1 part cement to 6 parts sand.

For Internal wall Finish:

1:0: ¼ of cement lime and sand.