Negative side waterproofing is applied to the dry or inside face of the subsurface. It is used primarily for water holding purposes. Negative side waterproofing prevents water from entering occupied space. However, it does not prevent water from entering the substrate.
Liquid waterproofing membrane have the advantages , low cost and tremendous elongation however, the obvious drawbacks is the inconsistency in coverage. When applying the it, applicator need to take extra precaution to ensure the are able to achieve the minimum coverage.
Disadvantages of bituminous waterproofing membrane
They tend to crack and cause leakages due to weather changes. They may melt/loosen during the summertime and harden during winter time which leads to possible delamination and cracks.
Quality waterproofing systems should last for at least 10 years. However, this is largely dependent on the type of waterproofing materials used as well as the workmanship of the waterproofing contractor. Statistics have shown that faulty waterproofing is among the top building defects.
The single biggest cause of waterproofing failure is workmanship. Poor workmanship would account for 90% of all failures in waterproofing. The waterproofing membrane is only as good as the surface on which it is applied or installed.
Because waterproof coatings are sensitive to water, you'll want to wait a few days after cleaning your deck so the wood or concrete is completely dry. Pay attention to the weather forecast to make sure it won't rain several days after the application. If it does rain, it could potentially affect the coating.
POLYURETHANE
Polyurethane is considered one of the best waterproofing materials. It can be applied seamlessly and penetrates the surface deeply and evenly. Thus, the polyurethane membrane will fill in even the finest cracks in concrete, reducing its water absorbency capacity.
From the point of view of a home buyer, building waterproofing is important because: It's not just about keeping the building dry: Good waterproofing is not just about preventing seepage into a building, it is also about reducing internal humidity, and making a building more comfortable to work and live in.
PVC Membrane
While PVC with reinforced membranes is more durable, an unreinforced membrane offers more flexibility. PVC is easy to install and is built to last, making it a great waterproofing choice.
Poor casting and vibration, insufficient curing of the concrete, and lower quality aggregates can result in honeycombing, shrinkage cracks, or structure cracks that will allow water to penetrate the structure.
Positive-side waterproofing by definition is applied to the outside (wet) face of the subsurface building components, by contrast to negative-side waterproofing which is applied to the inside (dry) face of the subsurface building components.
Waterproofing sprays are commonly used to make clothing and shoes water-repellent. Several hours after inhalation of such sprays symptoms of dyspnoea can occur. Without therapy this can lead to pulmonary fibrosis.
Poor waterproofing can not only lead to structural damage but also “concrete cancer” & mould. Mould can lead to serious illness if not removed quickly for those who are asthmatic or have allergies.
Acute nose and throat irritation are possible during the heat treatment and application of the product, especially in indoor areas, due to the inhalation of potentially hazardous substances such as gas and condensed fumes. Safety Risk: The molten product may adhere to the skin and may cause burns.
Over time, rain jackets can lose their water-repellency. Waterproofing doesn't last forever. Whether from rubbing against a dirty car while packing up groceries, or a muddy dog wanting snuggles, a dirty jacket will stop repelling water.
Many waterproofing membranes deteriorate over time, due to exposure to UV rays, harsh environments, aggressive groundwater, or permanent ponding leading to the disintegration of the waterproofing layer. Ultimately this leads to the failure of the membrane.
When dealing with wet basements, most problems arise because of the outside environment. Therefore, it is necessary to look at the exterior portion of the basement and consider waterproofing basement walls from the outside. Waterproofing can prevent seepage through cracks in the basement.
Bituminous Coating Waterproofing
It is the cheapest method of waterproofing. The bitumen is sprayed over the surface to provide a thin film that prevents the ingress of water.
What's the Different Between a Sealer and a Waterproofer? Sealers and waterproofers perform similar functions, but they differ slightly in how they work. A wood or concrete sealer will protect the surface. Waterproofers are more durable than sealants because they penetrate the surface, filling in leaks or gaps.
Damp proofing is intended to keep out soil moisture, while waterproofing keeps out both moisture (or water vapor) and liquid water.
Here's what you need to know in terms of maintenance of your waterproofing system: Preventative maintenance should be carried out at least once every 4 months. That's 3 times a year.
Full Cure is reached within 3-5 days (depending on temperature and humidity). To ensure the best waterproofing for your builds be sure to fully understand the requirements of the waterproofing system and allocate time based on substrate conditions, and dry and cure times of the selected waterproofing system.
Post-monsoon conditions allow the repair and waterproofing work to progress quickly and smoothly, giving you long-term results.