Moisten the pieces before placing them to avoid dehydration of the mortar and the resulting decrease in the mechanical strength of the wall.

Lay the blocks vertically and not “a estragon” rubbing on a layer of mortar until it is overflowing by the joints).
 

Start the horizontal rethinking from the corners, matches between walls, voids and movement joints by placing the pieces of modulation or cut pieces, the most remote from corners and walls matches, trying to make the separation between these pieces in consecutive spuns is greater than 1 meter.
 

Vertical joints will be made with maximum machihembrado, appling no morter. Will remain a separation between consecutive spuns vertical joints, greater than 7 centimeters.
 
In exterior walls of a single sheet, to form the horizontal joint apply mortar discontinuously forming two separation mortar bands of 1 to 2 centimeters, once settled blocks. In exterior sheeting of walls and exterior walls, place the continuous horizontal mortar joint.
 
Place a thick mortar of about 3 centimeters, so that once the block is seated, there is a bed joint left 1 to 1.5 centimeters. This thickness can be adjusted for vertical adjustment of the wall.