Membrane: Waterproofing should be applied over all exposed substrate surfaces, particularly concrete. Membrane under pressure slabs on the ground can extend under the foundation walls and over the pile caps.
The waterproofing should cover the structural movement, preventing water damage to substrate, adjoining walls, or flooring. Providing a secure 'envelope' to protect the wet area. Materials used in the construction and waterproofing of bathrooms and laundries must be suitable for purpose.
Exterior walls and balconies exposed to tropical weather are most vulnerable to water damage. Interior spaces such as kitchens, laundry rooms and bathrooms are often the first to experience deterioration owing to heavy water usage.
Walls must be water resistant to a height of not less than 150 mm above the vessel, for the extent of the vessel, where the vessel is within 75 mm of a wall (see Figure 10.2. 5). Waterproof wall junctions where a vessel is fixed to a wall.
For showers and bathtub surrounds, KERDI must be carried to the height of the showerhead at minimum. KERDI application on the ceiling is optional for showers and bathtub surrounds but required on the ceiling for enclosed showers. For intermittent use steam showers, KERDI must be applied to walls and ceilings.
DIN 18533-1 (Waterproofing of components in contact with the ground, Part 1: Requirements, planning and implementation principles) specifies the water action classes against pressing water depending on the immersion depth: Up to an immersion depth of 3.0 m, water exposure class W2.
Most water-based membranes require a final application rate of approximately 1.5L per per square meter. This is often achieved with two coats, however, as application techniques and membrane viscosity vary, you may need to put on further coats to achieve that type of usage.
The main advantage of interior waterproofing is it's less expensive and less disruptive than exterior waterproofing. It can be done without excavating the outside of your home, so you won't have to damage your landscaping or dig up your driveway. 1. Quick installation.
If you want to implement waterproofing in a shorter timeframe, then waterproofing above screed is better for you. However, if you want more durability, then waterproofing below screed should be considered.
That's because bathrooms are wet areas, which means they're more prone to water damage than any other room. The National Construction Code (NCC) requires all wet areas in a home, including bathrooms and laundries, to be waterproofed.
Waterproofing should be studied and made compatible with all the components of a building so that, in the future, there are no flaws and it should be done during the structure phase of the building, before the application of finishes, so that they are not degraded by the effects of humidity.
Basements and Cellars
Factors such as hydrostatic pressure, inadequate drainage, and cracks in the foundation can lead to water infiltration. Waterproofing these areas is essential to prevent water damage, dampness, and mold growth, which can compromise the structural stability of the building.
A waterproofing sheet membrane such as the Mapeguard WP 200 is designed to be installed on the surface of the tile backer board and shower base, using either a thin-set mortar or self-adhesive “peel-and-stick” technology.
The key is to apply enough membrane, so read and follow the manufacturer's recommendations for coverage to guarantee the right thickness. (Waterproofing membranes are applied more than 10 times as thick as a standard wall paint.) Apply in even coats using a paint brush or roller, taking extra care in the corners.
Quality waterproofing systems should last for at least 10 years and sometimes they can last much longer given the right circumstances. However, this is largely dependent on many factors including: The type of waterproofing materials used.
Cementitious waterproofing is the easiest method of waterproofing in construction. The materials for cementitious waterproofing is easily available from suppliers of masonry products, and they're easy to mix and apply. This method is often used in the internal wet areas such as toilets.
IS 16532 : 2017: APP Modified Bituminous Waterproofing and Damp-Proofing Membrane with Polyester Reinforcement - Specification.
Pro tip - Waterproofing before painting is a must for a dry and healthy home. What adds to that protection is "waterproof paint". The combination of the two keeps your house damage-free for longer.