Waterproofing is a lifesaver for your buildings now, in the future and forever. Waterproofing will make a massive difference for people of all ages, right from toddlers to the elderly. Making your home impervious to the ingress is called waterproofing, and it might cost only 1% of the total construction cost. But avoiding it to save you this 1% might cause a loss of 90% as the years pass. So never think twice about waterproofing the walls, foundations, roofs, kitchen or even toilets and bathrooms as these places might be prone to water and vapour ingress.
There are different types of waterproofing, and as the years advance, the technologies are getting better and better. The techniques that were used for waterproofing before a decade or two have now become obsolete.
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In this blog, we’re going to explain different types of waterproofing and the benefits of each. Read the advantages and disadvantages of each method and choose wisely.
The bituminous waterproofing method is used to protect your buildings, both commercial and residential, from water ingress. The technique is covering the areas prone to water ingress using Bitumen, which is an amalgamation of organic substances. It is a semi-solid form of petroleum and is highly viscous, sticky and possess superior waterproofing features as hydrocarbons repel water. Bitumen is basically Asphalt or Coal-tar. Bitumen is also used to construct roofs as roofing felts or rolls and is very effective in protecting the building from damages due to water ingress. There are two types of Bitumen waterproofing methods: The bituminous coating waterproofing method and the Bituminous membrane waterproofing method.
Bituminous Coating Waterproofing Method
In the Bituminous coating waterproofing method, bituminous paints which have bitumen as their foundation are used. By mixing Bitumen with solvents such as mineral spirit or naphtha, bituminous paints are made. In coating applications, an advanced form of bituminous paint is used for coating the surfaces which need to be waterproofed. It is cost-effective and protects your surfaces from UV rays. The flexible coating will give additional protection to the concrete surfaces and prevent water from seeping in and damage the structure. Bitumen is naturally insoluble in water, and this property makes it even more effective as a sealant or a waterproofing coat. It is vapour-proof, flexible and is also known as Asphalt coating. Also, as Bitumen paints are Alkaline resistant, it is also used for coating underwater structures as well.
However, Bitumen is made from crude oil and is not sustainable. The material is also combustible and is not compatible in areas where the temperatures rise to the extreme. If combined with the right solvents, Bitumen will perform well and act as the perfect waterproofing coating for your buildings.
Bituminous Membrane Waterproofing Method
The Bituminous waterproofing membrane is used on sloped surfaces to prevent water and vapour ingress and is also highly cost-effective. The membrane comes as rolls or sheets and is laid on a firm surface which will be protected UV and water damages. The Bituminous membrane is stuck to the surface using a strong tar-based adhesive and a blowtorch. This will provide proper and improved adhesion and performance. The sheets or membranes are overlapped by almost four inches, or in some cases, the sheet itself is melted to stick it to the adjacent one to provide better adhesion and waterproofing. The quality is consistent, and you should ensure that an expert in Waterproofing is chosen to deliver the services to prevent leakages.
Cementitious waterproofing coatings are breathable coatings that can provide positive-negative side waterproofing for concrete and carved surfaces. Conventional ceiling and waterproofing systems include bituminous materials, plastic waterproofing foils, and metal tapes for interior and exterior applications. In addition to these systems, products based on reactive resins, thoroughly dispersed, pasty products, and cementitious waterproofing membranes are now widely used to maintain the structural condition of buildings and seal and protect exterior surfaces against the action of water and moisture.
By mixing cement with acrylic products, we acquire the waterproofing characteristics, which provides an excellent cementitious bonding that lasts longer. The cementitious waterproofing has two steps, and in the first step, the primary coat is applied. A trowel, a brush or a spray tool can be used to apply the mixture and to ensure uniform thickness throughout the surface. Ensuring uniform thickness throughout the cementitious membrane is essential for optimum results.
Application of Cementitious waterproofing
Water is crucial but can also be the biggest nightmare when it comes to constructions. The groundwater, rain, and surface water can be a threat to construction materials. Engaging cementitious waterproofing can protect the wet surfaces from water and vapour ingress. The applications of cementitious waterproofing include sealing and waterproofing of wet floors. Also, cementitious membranes can be used to protect concrete walls from aggressive chemicals. Cementitious waterproofing offers excellent waterproofing even if exposed to water or vapour permanently. The exceptional resistance to long-term weathering, great load-bearing capacity, good scratch resistance, and superior water vapour permeability make cementitious waterproofing methods much accepted and chosen over other waterproofing methods.
Polyurethane is an amalgamation of Polyol and Isocianide, and they act as base and reactor, respectively, in the waterproofing process. By combining these two elements in a specific ratio, Polyurethane, a liquid with excellent waterproofing qualities, is formed. Polyurethane is a widely accepted waterproofing method as it is easy to install, unlike the other sheet or membrane waterproofing methods. This type of waterproofing can be done post construction as well. The installation is relatively easy, demands minimal supervision and ensures perfection. The Polyurethane waterproofing will protect your buildings from harsh weather, chemical attacks, UV protection and long term wear.
The method is highly economical, and you can even apply it over already existing waterproofing coatings if you want to. One must be careful before choosing the Polyurethane waterproofing available in the market. Otherwise, the one you select might not possess the properties to live up to your expectations when it comes to waterproofing. The perfect Polyurethane waterproofing coating will have the following features:
A good Polyurethane waterproof coating will:
Another most preferred waterproofing method is thermoplastics. It might not be the cheapest, but it does what it is intended to do best. The material is so good that it has the potential to waterproof your construction for at least 50 years. Thermoplastic, when heated, changes from solid into a semi-solid form and ensures perfect adhesion and zero leakage. The polyester knit fabric coated with ethylene interpolymer compound renders in with superior waterproof features. Its impressive tensile and tear resistance, puncture resistance and stability make the method even more user friendly and durable. The thermoplastic membranes are available in two thicknesses, and they can be your lifesaver when it comes to bladder type situations. The material has the ability to keep liquid and vapour out, so it is the perfect choice when it comes to waterproofing your constructions.
Rubberised asphalt Waterproofing membranes consist of asphalt and rubberised polymers with some mineral stabilisers. The monolithic membranes created by rubberised asphalt can cover large surfaces and protect them from water ingress effectively. If you want to waterproof extensive vegetative assemblies or intensive roofing assemblies, hot rubberised asphalt will come in handy. Primarily rubberised asphalt is used for protecting commercial constructions. The material is really tough and can guarantee your buildings with protection and minimal vapour permeability. The cost of the process depends on the area which is to be waterproofed.
Poly Vinyl Chloride waterproofing membrane is made by mixing PVC resin with plasticisers, UV absorbers and other additives to render superior waterproofing characteristics. The polyester reinforced membrane is a promising material and will offer extended durability. The unreinforced membrane is more flexible than the reinforced ones and is used for waterproofing swimming pools, underground structures, tunnels, etc. some of the features that make PVC waterproofing popular are:
PVC membranes can be applied on flat roofs and offer irreplaceable finishing. After installing the PVC membranes, the roofs can be used for recreation as the surface becomes smooth and better. With the durability so high, the membrane can last up to fifty years with a meagre maintenance cost.
EPDM is a type of synthetic rubber that is used for waterproofing flat surfaces. EPDM stands for Ethylene Propylene Diene Monomer. It has extreme weather and water-resistant features and is also used in vehicles. The material is class M rugged and is made of ethylene and propylene. EPDM rubber is better performing than other waterproofing membranes such as Bitumen, both technically and commercially. The EPDM membranes do not require a flame, torch or gas to apply. But bonding adhesives are used for the application, unlike the other torch-on membranes. EPDM is a material with high elasticity and viscosity. The high tensile strength it possesses and the ease of application make EPDM a common and widely used waterproofing material in both commercial as well as residential buildings.
Liquid waterproofing membranes can be applied like paint and possess high elasticity. The materials used for liquid waterproofing will be based on the surface you wish to waterproof. Material like PVC, cement, Silicone, rubberised asphalt, etc., can be used for the liquid waterproofing method. Choosing the material will mainly depend on the surface and the use of the surface. Understand the features of each material and what circumstances a material cannot or can withstand. The liquid waterproofing system is monolithic, i.e., without joints. It is a fully bonded and highly secure system and prevents infiltration efficiently. A large number of people are adapting the environment friendly and easily repairable model waterproofing for cost-effectiveness and ease of installation.
Since liquid waterproofing membranes offer excellent durability, exceptional elasticity and much easier to implement, it is popular among the waterproofing methods. Choosing the right material to waterproof your buildings to prevent vapour and water ingress is important to protect and safeguard them for a longer time.
Waterproofing your buildings is crucial as water has the ability to destroy the entire construction if seeped in. Your buildings won’t be able to withstand even the vapour ingress. Waterproofing is a mandatory process that will benefit everyone if appropriately implemented. The construction costs are already high, and the waterproofing might come up to a maximum of ten per cent of the total construction costs. Avoiding the process to save you some money might be the reason to lose a lot more in the future. Be wise and do proper research before choosing a waterproofing method to be implemented before jumping at the first option. There are many waterproofing methods available in the market these days, and each has very specific features and purposes.