Noticing broad cracks in brick wall implies foundation settlement. If the crack occurs further, consider brick repairs Perth by substituting the cracked bricks. Here are a few brickwork repairing types to know, and it may be useful.
Repairing Active Cracks
The active cracks happen due to thermal movement. It reoccurs even after repairing. The different crack types of brick repairs Perth include:
- Brick wall crack width less than 2mm- It is repairable using some filling paint. Curing the painted crack for 3-4 days will resolve the issue.
- Brick wall crack width that is 2mm to 5mm- Such cracks may be repaired by injecting grout having 1 kg cement, 0.1kg grout polymer, and water 1-litre. Bore the hole for some distance, apply or inject the grout mixture using a pressure pump.
- Brick wall crack width that is 5mm to 10mm- With this depth of crack width, it requires eliminating the loose materials, detaching the plaster on the crack both sides and filling the groove using polymer of 10% by the cement weight. As the cracks get filled, inject along the crack line the grout mixture and also apply the grouting method above the cracks.
- Brick wall crack width over 10mm- Remove from the crack all the loose materials, detach plaster on the crack and both sides, and fill the cracks in 1:3 ratio.
Repair the cracks that are larger in width than 1mm by stitching crack method. Bore through the wall hole, M.S. clamps with 8mm diameter bars and affix with nuts and washers. Grout using cement slurry the clamps and inject using pressure. Let the first cement plaster layer be thick in 15mm and the second layer with 20mm thick. Ensure the existing surface has double coat plaster.
Separation Cracks Repairing
Columns and beam or brick work separation cracks are a matter of concern. They are grave problems. These separation cracks are due to various materials. Thus, it must be repaired with proper flexible material. There is a need to secure over the separation crack the chicken wire mesh and to replaster it. It helps in brick repairs Perth on replastering as it resists the cracking reoccurrence among the brickwork and RCC member and wooden frame.
Heavy Cracks Repairing
Foundation settlement results in heavy cracks on the brickwork. It is recommended to give cement concrete mix, for larger cracks. The same mastic compound is useful to fill brickwork cracks. For thin cracks or brick repairs Perth, apply bituminous compound and fill the cracks, if the mortar or concrete is unable to self-penetrate. Bear in mind, the cracks in brick must not be filled using full cement sand mortar.