Poor quality of bricks
Cheaper, substandard bricks could deterriorate with time - resulting in crumbling, chipping, cracking and colour fading.
Poor quality of sand
Inferior sand could affect the paving. Clean river sand or dune sand to be used. (NEVER unwashed beach sand)
Weak mortar mixes
Jointing, grouting and bedding mortar need to be of correct strengths. Cheap mixes using insufficient cement, will result in brick failure. BPI members have the correct mortar specifications.
Subsidence
This is a common problem with incorrectly prepared base construction. Your contractor should have the correct compaction equipment and knowledge of correct base treatment.
General finish
Inexperience or poor workmanship causes cement staining, deviation in pattern lines, waviness of surface levels. members of the BPI have to abide by minimum standards of specifications, ensuring a good standard of work.
