These cracks are larger than 0.2 mm, which are considered wider and deeper than typical cracks as they may have stemmed from the other side of the wall. Cracks can exist with both interior and exterior wall, as well as both before and after refinishing. Prospective areas include around columns, crossbeam, door or window sashes. Cracked walls distract the solidity of building and allow rains to leak into the cracks.
Causes of Cracked Wall
Cracked wall in turn cause blisters, blemishes and algae. Cracks can result from several factors, such as inappropriate mechanics calculation, insufficient research on soil layers and non-standard construction. As well, geographical factors affect the cracks. These include buildings located near area with high vibration, e.g. road with large trucks, high-capacity machine, construction site or pile driving works. Structural problems are also the causes of wall cracking and corroding, such as overweighing storage and masonry work not bearing the beam or column.
Cracks found on original wall can be fixed with wall putty with no hassle. Painters are normally capable of handling with cracks which shows no expansive potential. However, cracks with expandability not receiving proper repair tend to repeat cracking on the same spots. Fixing method should therefore relate to the nature and expandability of cracks. Options of repair include remove plasters down to the mortar, install reinforce wall mesh and plaster the wall; enlarge the cracks and fix with wall putty; or doing the V-CUT and fill with paintable sealant, then prepare the surface with primer and refinish twice (In case the expandability is uncertain, use coating with elongation).