Hi, I would like to share with you different waterproofing solutions that are used in constructions and repair sites. This will help you avoid waterproofing failures. A key cause of waterproofing failure is not only poor workmanship and material quality, but also the inappropriate waterproofing type for a specific problem/site.
There are many best waterproofers in Auckland available in the industry, but architects often have difficulty deciding which one to use for a particular problem. The decision-makers are also confused by the contractors’ knowledge and budget of clients.
These are the brief advantages and disadvantages of which waterproofing solution to choose:
Cementitious waterproofing
One of the most popular waterproofing methods is cementitious waterproofing. It is used primarily in sunken areas such as kitchens and toilets, basements, terraces (on mother surface), and basements. Although cementitious waterproofing can be recommended for sunken areas, there are many failures due to poor workmanship and below-grade chemicals. Many cementitious coatings do not allow for flexibility, and some can even be rigid. Flexible coatings are necessary in order to withstand the expansion and contraction of the structure. Prepared coatings are flexible if they contain enough polymer chemicals. Some contractors apply cementitious coatings to terraces, leaving the surface uncoated. Cementitious coatings do not resist UV light so safety plaster is required. A waterproofing coating must also have vapor permeability to allow your structure to breathe.
Liquid waterproofing membrane
This type of waterproofing is the most efficient. Liquid applied waterproofing is a seamless waterproofing method that provides a flexible membrane and a layer of protection. The formulation of the polymer used in production determines the durability and quality. The key benefits include high elongation, UV resistance and great durability. It is recommended for sunken areas at critical sites such as terraces, basements and swimming pools.
Bituminuos based membrane
Bituminous-based waterproofing membranes are still very popular. Bituminous-based waterproofing is not recommended due to the poor quality of bituminous sheets and lack of advanced techniques. Bitumen-based membranes are not as UV-resistant as cementitious coatings and should be safety screeded over. There have been many instances where bitumen-based sheets were left open by contractors (i.e. Without safety screed, the sheet was unable to withstand weather changes and cracks within one or two years. Clients may be unable to afford the necessary knowledge or have a reduced budget. A client’s budget is an important factor in any decision, but waterproofing failures are always more costly.
Liquid membrane made of polyurethane
Polyurethane has a higher degree of flexibility, but it can also be used on flat roofs. The concrete slab must be checked for moisture before polyurethane can be applied.
