It’s a dream for everyone to have their own house. Even better than that, being able to witness the construction of the foundation of a house and to see that it is shaped in front of you. What can awaken you from this beautiful dream? What can transform this beautiful environment into a nightmare? Of course, waterproofing that made it wrong! This insulation is a must for a building. If a settlement is not sufficiently well insulated, this discharges the entire structure of a building, resulting in long-term problems affecting the overall construction life. If you’re looking for information to guide you through the procedures, products and procedures for the following types of insulation in the construction of your dream home, and if you are in search of an answer to the question of what is the best waterproofing material, continue reviewing this article!
There are many types of waterproofing materials. As you should know, waterproofing is going to make a big difference in your life. Without the right type of waterproofing, your house is going to run into major problems. Waterproofing is vital for many purposes. It is great at home, in your vehicle, for various clothing items, and even for the family boat. Just remember that not all waterproofing materials are suitable for all purposes. Therefore, you need to make sure that you get the right types of waterproofing materials for your individualistic needs.
At Hitch Property Constructions, we offer the best range waterproofing services to rectify your water issues.
A guide to different types of materials used in waterproofing
Polyurethanes are formed by reacting a polyol (an alcohol with more than two reactive hydroxyl groups per molecule) with a diisocyanate or a polymeric isocyanate in the presence of suitable catalysts and additives. Because a variety of diisocyanates and a wide range of polyols can be used to produce polyurethane, a broad spectrum of materials can be produced to meet the needs of specific applications.
Polyurethane (PUR and PU) is a polymer composed of organic units joined by carbamate (urethane) links. While most polyurethanes are thermosetting polymers that do not melt when heated, thermoplastic polyurethanes are also available. Polyurethane polymers are traditionally and most commonly formed by reacting a di- or triisocyanate with a polyol. Since polyurethanes contain two types of monomers, which polymerise one after the other, they are classed as alternating copolymers. Both the isocyanates and polyols used to make polyurethanes contain, on average, two or more functional groups per molecule. Polyurethanes are used in the manufacture of high-resilience foam seating, rigid foam insulation panels, microcellular foam seals and gaskets, durable elastomeric wheels and tires (such as roller coaster, escalator, shopping cart, elevator, and skateboard wheels), automotive suspension bushings, electrical potting compounds, high-performance adhesives, surface coatings and sealants, synthetic fibres, carpet underlay, hard-plastic parts etc. The main ingredients to make a polyurethane are di- and tri-isocyanates and polyols. Other materials are added to aid processing the polymer or to modify the properties of the polymer.
Cementitious coating refers to a coating that contains Portland cement as one of its components and is held on the surface by a binder. A cementitious coating provides corrosion resistance to substrates; for example, steel is protected from corrosion by maintaining the pH level above 4.0 at the metal/coating interface because steel corrodes at a lower rate in this pH range. The cementitious coating is a two-component, thixotropic, cementitious modified polymer coating. This coating provides high adhesion to both concrete and steel. This coating provides protection from the effects of aggressive acid gases, moisture and chlorides and also resists chemical attack on the concrete or other substrates. This coating forms a highly elastic hard and alkaline coating on the substrate. The cementitious coating protects concrete in sulphate contaminated ground conditions.
The cementitious coating is useful for internal and external structural waterproofing of concrete and other mineral substrates. It is also useful for underground structures as well as roofs and decks. The cementitious coating can protect highways and coastal structures from a chlorides environment and enhance the durability of reinforced concrete.
EPDM rubber (ethylene propylene diene monomer rubber) is a type of synthetic rubber that is used in many applications. EPDM is an M-Class rubber under ASTM standard D-1418; the M class comprises elastomers having a saturated chain of the polyethylene type (the M deriving from the correct term polymethylene). EPDM is made from ethylene, propylene, and a diene comonomer that enables crosslinking via sulphur vulcanisation. The earlier relative of EPDM is EPR, ethylene-propylene rubber, that contains no diene units and can only be crosslinked using radical methods such as peroxides. Dienes used in the manufacture of EPDM rubbers are ethylidene norbornene (ENB), dicyclopentadiene (DCPD), and vinyl norbornene (VNB). EPDM is derived from polyethylene into which 45-85 wt% of propylene have been copolymerised to reduce the formation of the typical polyethylene crystallinity.
EPDM is a semi-crystalline material with ethylene-type crystal structures at higher ethylene contents, becoming essentially amorphous at ethylene contents that approach 50 wt%. Rubbers with saturated polymer backbones, such as EPDM, have much better resistance to heat, light and ozone than unsaturated rubbers such as natural rubber, SBR or polychloroprene (Neoprene). As such, EPDM can be formulated to be resistant to temperatures as high as 150°C, and, properly formulated, can be used outside for many years or decades without degradation. EPDM has good low-temperature properties, with elastic properties to temperatures as low as -40°C depending on the grade and the formulation. A roll of EPDM flashing with fleece on the back, used for waterproofing roofs As with most rubbers, EPDM is always used compounded with fillers such as carbon black and calcium carbonate, with plasticisers such as paraffinic oils, and has useful rubbery properties only when crosslinked. Crosslinking mostly takes place via vulcanisation with sulphur but is also accomplished with peroxides (for better heat resistance) or with phenolic resins. High energy radiation such as from electron beams is sometimes used for producing foams and wire and cable.
Bituminous waterproofing systems are designed to protect residential and commercial buildings. Bitumen (asphalt or coal-tar pitch) is a mixed substance made up of organic liquids that are highly sticky, viscous, and waterproof. These systems are sometimes used to construct roofs, in the form of roofing felt or roll roofing products.
The primary use (70%) of bitumen is in road construction, where it is used as the glue or binder mixed with aggregate particles to create asphalt concrete. Its other main uses are for bituminous waterproofing products, including the production of roofing felt and for sealing flat roofs. Bitumen properties change with temperature, which means that there is a specific range where viscosity permits adequate compaction by providing lubrication between particles during the compaction process. Low temperature prevents aggregate particles from moving, and the required density is not possible to achieve.
Roofing felt (similar to tar paper) is the base material used to make roof shingles and roll roofing. Used for decades as waterproof coverings in residential and commercial roofs, these bitumen compositional membranes incorporate two layers. The first underside polymer membrane is used as a solid background, often reinforced with glass fibres. Mineral granules make up the self-protective top layer, with a final bituminous mixture encapsulating them both. Typical uses of felt paper are as an underlay(ment) (sarking) beneath other building materials, particularly roofing and siding materials, and is one type of membrane used in asphalt built-up roofing (BUR) systems. The purposes are to “…separate the roof covering from the roof deck…shed water…[and] provide secondary weather protection…” Also, the rapid application of roofing underlay protects the roof deck during construction until the roofing material is applied and is required for roofs required to meet Underwriters Laboratory (UL) fire ratings. The separation of the roof covering from the roof deck protects the roof covering from resins in some sheathing materials and cushions unevenness and old nails and splinters in re-roofing applications. The underlayment also sheds water, which penetrates the roof covering from an ordinary leak, a leak from wind-driven rain or snow, wind damage to the roof covering, or ice dams. However, the application of underlays may increase the roof temperature, which is the leading cause of ageing of asphalt shingles and felt paper wrinkles when it gets wet, which (rarely) shows through asphalt shingles. Not installing an underlay may void the roof covering the warranty.
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Mastic asphalt (MA) is a dense mixture consisting of coarse aggregate, or sand, or fine limestone aggregate, or filler and bitumen, which may contain additives (for example polymers, waxes). The mixture is designed to be of low void content. The binder content is so adjusted that the voids are filled and that even a slight excess of binder may occur. Mastic asphalt is pourable and able to be spread in its working temperature condition. It requires no compaction on site.
Its durability and seamless application mean that it is one of the few membranes able to handle consistent heavy foot and vehicular traffic, including from Heavy Goods Vehicles, and still maintain its waterproof integrity. With no application too tricky, it is also easy to repair should alterations or damage occur. Another major advantage of mastic asphalt is that it can be laid at speed, reducing the project costs significantly. It also cools very rapidly, allowing foot traffic within two to three hours, depending upon ambient temperature.
Providing such excellent wear against the extremes of weather – and with a life expectancy of 50 years and more – the waterproof membrane is fast becoming the material of choice for a manner of different buildings including, schools, offices, shopping centres, hotels and even churches.
A thermoplastic, or them softening plastic, is a plastic polymer material that becomes pliable or moldable at a certain elevated temperature and solidifies upon cooling. Most thermoplastics have a high molecular weight. The polymer chains are associated by intermolecular forces, which weaken rapidly with increased temperature, yielding a viscous liquid. In this state, thermoplastics may be reshaped and are typically used to produce parts by various polymer processing techniques such as injection moulding, compression moulding, calendering, and extrusion. Thermoplastics differ from thermosetting polymers (or “thermosets”), which form irreversible chemical bonds during the curing process. Thermosets do not melt when heated, but typically decompose and do not reform upon cooling.
Waterproof TPU fabrics bond a thermoplastic polyurethane membrane to a base textile, such as nylon or polyester fabric, to create a wide range of high-performing materials that maintain their flexibility yet are durable and waterproof.
TPU has a long list of excellent material properties. It is abrasion-resistant, tear-resistant, has excellent bending and tensile strength, large elongation break, low-temperature resistance, low long-term deformation rate, and is resistant to chemicals, ozone, oxygen, oil, and fuel. TPU fabrics maintain the base materials flexibility and softness, too. These characteristics combine to produce technical textiles that withstand extensive wear and environmental stressors across hundreds of applications. TPU coated textiles are UV resistant, can stand up to extreme weather and environmental conditions, and resist abrasions and punctures. Combined with glued or welded seals, these fabrics have excellent air- and liquid-holding capability.
Sheet waterproofing membrane
As the name implies, these are membranes that arrive at the site in the form of rolls. These are then unfurled and laid on a firm surface. The most common type of sheet based membrane is a bituminous waterproofing membrane. This type of membrane is stuck to the substrate with a hot tar-based adhesive using blowtorches.
Joints between adjacent membranes are also made with the same hot adhesive. The sheets are overlapped by about 100mm (4″) to form a waterproof joint. Some membranes are even joined by melting them with a hot air gun and then overlapping them on the previously laid sheet. With this type of membrane, joints between sheets are critical and must be done perfectly to avoid leakage.
PVC waterproofing membrane
The polyvinyl-chloride (PVC) waterproofing volume material is one performance outstanding high quality, joins processing assistants and so on plasticiser, anti-ultraviolet ray medicinal preparation, anti-aged medicinal preparation, stabiliser after the PVC resin, through squeezes out the law production formation the high polymer waterproofing volume material. Because this product has used the unique product formula, the product life has far exceeded the general waterproofing material, and the entire waterproofing system life is long, the roofing surpasses for 30 years, underground surpasses for 50 years, in the construction, the civil engineering obtains the widespread application.
The PVC waterproofing membrane is a modern roofing material, which is made of high quality flexible (plasticised) polyvinyl chloride. Depending on the application area, there are reinforced and unreinforced membranes. Reinforced waterproofing membrane has a reinforcing base in the form of a polyester mesh or glass fibre, and it is used for waterproofing of roofs. Reinforced membranes have increased durability. Unreinforced membranes are more flexible, have high tear resistance and are used for waterproofing of underground structures, tunnels, swimming pools. Among the features of PVC waterproofing membrane, its vapour permeability should be highlighted. Due to this characteristic, the material can let moisture out of the roof space of the building.
Liquid applied membranes
Liquid applied membranes come to the site in liquid form, which is then either sprayed or brush-applied on the surface—the liquid cures in the air to form a seamless, joint-free membrane. The thickness can be controlled by applying more of the liquid chemical per unit area. Since the application procedure is very quick, a contractor will try and finish the entire area to be waterproofed in a single day to avoid cold joints. However, if a very large area is to be done on successive days, cold joints can easily be done by overlapping the new membrane over the old – the chemical will stick to itself readily.
These are generally considered to be superior to sheet based membranes as they are joint-free. However, care must be taken in application to provide just the right thickness. The membrane can tear or break if it is too thin. The adhesion of the membrane to concrete must be good. If a concrete screed (layer) is to be applied over a waterproofing membrane, the membrane is made rough by sand broadcasting. This is throwing a thin layer of sand by hand over the wet membrane (before it has set fully) so that the sand sticks to the membrane and provides a rough surface the concrete can adhere to.
Different Waterproofing Methods
What are the ideal waterproofing materials for a venue? To give a solid answer to this question, we need to take a closer look at the waterproofing materials.
Cement Based Waterproofing Method
Let’s start with one of the traditional answers to the question of what are the waterproofing materials, cement-based waterproofing is the easiest waterproofing method in construction. Cement-based waterproofing materials are easily available fin various suppliers, and they are easy to mix and apply.
This method is often used in domestic wet areas such as bathrooms and toilets. This method is usually a complete or semi-flexible type of waterproofing. It is used in areas that are not sunlight or weather conditions.
Liquid Waterproofing Membrane Method
The ideal water insulation materials are the answers to the question, and the other is liquid (liquid) water insulation methods. The liquid waterproofing membrane method is a thin coating, usually consisting of a primer coat and two coats of topcoat applied by spray, roller or trowel. It offers more flexibility than cement based waterproofing types. Therefore, it is used more intensely nowadays.
So, how to apply the liquid waterproofing membrane method? The elongation properties of the coating can reach up to 2000%. The durability of the waterproofing coating depends on what kind of polymer the manufacturer uses in the construction of liquid waterproofing.
The liquid waterproofing membrane may be a spray-applied liquid membrane composed of polymer-modified asphalt. Different degrees of acrylic, hybrid or polyurethane liquid membranes for trowel, roller or spray are also available from various manufacturers.
Bituminous Coating Waterproofing Method
Bituminous coating is a type of coating used for waterproofing and flexible protective coating in accordance with the degree of formulation and polymerisation. Its flexibility and protection against water can be influenced by the polymer class as well as the reinforcement of the fibre.
Bituminous coating is also called asphalt coating. The most common applications of bituminous coatings include areas under the screed. It is an excellent protective coating and waterproofing material on surfaces such as concrete foundations.
The bituminous coating is made of bitumen based materials and is not suitable for exposure to sunlight. As long as it is not modified by a more flexible material such as polyurethane or acrylic-based polymers, it becomes very fragile when exposed to sunlight for a long time.
The flexibility of finished products always depends on the solids content of the polymer added to the bit.
Bitumen Membrane Waterproofing Method
Bituminous membrane waterproofing is a popular method used on low slope roofs due to their proven performance. It is a bituminous waterproofing membrane and self-adhesive membrane.
In addition to the self-adhesive compounds, asphalt, polymer and filler, certain resins and oils may be added to improve the adhesion properties. As the adhesion properties of the membrane decrease over time, the self-adhesive type has a low shelf life.
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Polyurethane Liquid Membrane Waterproofing Method
Polyurethane liquid membrane waterproofing method is used for flat roof area and is exposed to weather conditions. This waterproofing method is expensive compared to others.
Polyurethane Liquid Membrane can offer higher flexibility. Polyurethane is very sensitive to the present moisture content, so it is necessary to be very careful when evaluating the moisture content of the concrete slab before application. Otherwise, the membranes may peel off or the bond after some time.
There are many unique types of waterproofing materials. Some are more effective than others. With this in mind, you need to know that not all of them are equal. Therefore, you must take some time and energy to find out which one is going to work best for your individualistic project requirements. You need to research these materials to find out which one is going to be most effective for your precise application. You have learned more about these materials above. Take your time and find the one that’s going to be best for your home.