• Geotextile Membranes -ALCHIMICA
    In the construction industry, professionals are always looking for new ways to improve the efficiency of their installations and deliver durable projects using new materials and methods. In the case of waterproofing system installations, geotextile reinforcement provides an important benefit of reinforcing elastomeric materials for a long-term protective solution because they are more effective than a glass mesh, or fiberglass mesh, both of which can also be used for the same purpose. Geotextiles are fabric made sheets that are used as reinforcement in various applications but mainly are used in drainage and construction projects. For the most difficult and demanding areas of construction to a simple concrete roof, geotextile fabrics can be used for drainage and filtration purposes, for stabilizing the ground or even in reinforcement materials. They are divided in two categories, the non-woven and the woven geotextiles, which both have differences on how they are produced, their properties and how they are used in applications. Woven geotextiles have a high load capacity and tensile strength, are mainly impermeable and they are ideal for stabilization and reinforcement applications. On the other hand, ideal for waterproofing applications are the non-woven geotextiles which although they possess a lower tensile strength, they provide durability and ease of application benefits. Geotextile in waterproofing applications Geotextiles protect and separate a membrane from a structure. With their pre-brake elongation capacity, higher than other materials such as glass mesh or fiberglass mesh, they can follow the movement of elastomeric waterproofing materials, achieving reinforcement and long-term durability. It is common for unsound substrates to have high movement or large cracks which can cause problems on unarmed waterproofing membranes, causing tearing of the membranes and/or loss of adhesion. Even if the elastomeric waterproofing membranes hold great elongation properties, they still need reinforcement because the crack’s width may increase in the future. In that way they prevent the potential creation of future cracks in membranes. To effectively seal and protect details in an area like a roof we can use wet on wet a waterproofing membrane with geotextile, securing their efficiency against water ingression and mechanical pressures. This is a reliable method of reinforcing construction details, flashing, joints etc. and repairing existing cracks and gaps. ALCHIMICA offers a high-tensile strength range of non-woven geotextiles, made of 100% polyester fibers, manufactured with the needle punching process. They can be applied on the full surface between the first two layers of the HYPERDESMO® System, providing the required reinforcement of waterproofing in certain applications (i.e. over old bitumen membranes, unsound screeds) by preventing the potential creation of future cracks They are suitable for either solvent-based or water based liquid waterproofing systems. Find more about our products:
  • Aliphatic top coats and protective coatings
    A top coat is defined as the protective coating which is applied to the surface of another material in order to protect it and prevent deterioration. In the case of waterproofing and flooring systems, the protective coat resins are applied as a final layer enhancing the system’s performance and durability. Their application can span from ordinary roof waterproofing systems that require access and trafficability, to exposed car parks waterproofing systems and industrial flooring applications. There are 2 categories of top coats, the aliphatic protective resins for exposed use and top coats that offer high mechanical and chemical resistance for industrial applications. Aliphatic top coats offer full UV resistance, prevent chalking, cracking or any other UV degradation while they increase the system’s overall performance in terms of mechanical properties. Top coats for industrial applications give high scratch and chemical resistance, making them suitable to industrial flooring applications such as F&B factories, hospitals, as well as desalination and waste water treatment plants. The professional applicators can deliver successful projects using protective coat resins by increasing the main membrane’s life cycle and prevent in this way any future maintenance costs. In the case of a roof waterproofing project a top-coat installation is recommended to the end-users for achieving the optimal result. Apart from the fact that adds protection and durability to a waterproofing system, it becomes part of cool roof system when is applied in white color which improves the energy efficiency of buildings and supports the development in urban sustainability for cooler and healthier environments by reflecting most of the energy of the sun. Moreover, using a top-coat in a system built- up allows the applicator in certain cases, to apply only one layer of the main waterproofing membrane. Similarly, protective coat resins ensure the efficient and successful delivery of flooring. The top-coat main benefits to be considered are: Protection: Protect from weathering, abrasion, chemicals and UV radiation, salt or sand impact. Application: Easy to apply. Mechanical resistance properties: Play a key role in increasing the mechanical resistance of a waterproofing/flooring system, thus offering trafficability whether in exposed car parks or industrial floors with heavy usage. Aesthetics: Provide different aesthetic results such as different colors, chips and flakes finishes, glossy or matte effects. Durability and energy efficiency: Thanks to their high mechanical and chemical resistance, they offer weathering protection which improves the durability, providing extended working life of the system. In addition, because of their ability to reflect UV radiation when applied in white color, they help reduce the cooling costs of the building. ALCHIMICA’s aliphatic solutions ALCHIMICA’s range of protective coatings has a large number of applications in both waterproofing and flooring solutions. They are a part of ALCHIMICA’s full systems -that include primers and main membranes- and when applied they significantly increase the lifespan of our systems by adhering perfectly to our main membranes and forming the highest level of protection. ALCHIMICA’s aliphatic solutions expand on 3 different technologies: solvent-based, water-based and 100% solids products. They are fully aliphatic and provide excellent color and UV protection with no yellowing effects. They increase traffic resistance and assure high chemical resistance, forming the highest level of protection. Find out more about ALCHIMICA’s aliphatic top coats and protective coatings  
  • Water ponding resistance - Hyperdesmo
    Ponding water effects in flat roofs with poor slope designs and ALCHIMICA’s polyurethane waterproofing system solution. In flat roofs that display poor construction and design it is rather usual to face the phenomenon of standing water. As when a flat roof has no inclined slopes and drainage issues, the water can easily remain for extended amounts of time and cause the ponding water effect. Water ponding is defined by the US National Roofing Contractor Association as "water that remains on a roof surface longer than 48 hours after the termination of the most recent rain event". This phenomenon may cause long term water leakage issues and the need for costly repairs. Moreover, the negative effects can affect the longevity of the roof substrate when more leaks appear and lead to concrete corrosion but also cause the damage of the existing applied roof waterproofing system. Liquid applied waterproofing systems can be effective solution to proactively prevent this kind of problems but they are also considered as a great solution for post-repairment actions. Liquid applied waterproofing membranes with high ponding water-resistance are capable to remain bonded with great adhesion to the substrate providing a great protection especially when puddles are being formed on the roof due to poor slope design. One way to test if the existing applied membrane keeps its adhesion abilities is to press it on the ponding areas. Without proper ponding water resistance properties, a waterproofing membrane will start blistering and peeling, leading to the roof system deterioration. Our HYPERDESMO® waterproofing membranes hold excellent water resistance properties with zero water swelling rate, being elastomeric with high UV, chemical and mechanical resistance and they protect roofs from harsh environmental conditions. Learn more about HYPERDESMO® waterproofing membranes here
  • Polyurethane Liquid Waterproofing membranes
    The need of waterproofing and protection of constructions for a better future and living conditions has led to new innovations and the use of high state-of-art synthetic polyurethane polymers, the so-called liquid membranes. Polyurethane waterproofing membranes are liquid applied systems that offer decisive advantages particularly where seamless systems are desired; either structurally or aesthetically, and for geometrically complicated connections with ventilation outlets or upturns. These systems cure to yield seamless membranes with long-term flexibility while sealing around even in the most complex protrusions becomes easy. Advantages of Polyurethane liquid waterproofing membranes: · 2 mm coat thickness in 2-3 layers at most. · no significant load increase on lightweight decks and roofs. · UV resistant, no coat protection required. · easy to repair, even locally. · long term maintenance is quick and low cost. Membrane removal will not be necessary, whatever the kind of maintenance. · application on top of existing waterproofing systems is possible. All these benefits make it sound too good to be true but there is a catch: It is critical to success the right choice of material selection from the various alternatives in the market. Therefore, for effective waterproofing, the polyurethane liquid membrane must have the following attributes: · Impermeabillity. Obviously, zero water penetration is required. · Flexibility. They must withstand the normal movements of building structures (e.g. distortion, contortion, earthquake activity etc.). · Durability. They must be able to retain their integrity for long periods of time. · Breathability (sometimes required). Membranes must be able to breathe so that moisture vapours from building interiors and substrates can escape freely. · Humidity barrier (sometimes required). Essential in hot and humid climates. · Resistance. The membrane must withstand environmental and climatic conditions. Not all polyurethane membranes on the market satisfy these criteria! Especially, in the construction industry the importance of applying advanced durable solutions is crucial. At the end, a good polyurethane coating will display the following: · Zero water swelling rate and high retention of tensile strength, hardness and elasticity under prolonged exposure to harsh climatic conditions (UV, wetness, heat, ozone etc.) · Constant adhesion to the substrate when periodically exposed to harsh climatic conditions. · Superior performance in an environment which combines all possible climatic conditions. ALCHIMICA revolutionized the waterproofing technologies globally, being the game changer in global waterproofing technologies. We have shifted the focus worldwide from multi-layer systems, traditionally thought to guarantee water-tightness, to new systems based on advanced technology liquid membranes. We offer a wide range of Polyurethane Liquid Membranes which fulfil the above requirements. The waterproofing products available from ALCHIMICA are tailor made to provide long term protection against all natural elements. From roof waterproofing to below grade walls and foundations to highways and bridges or simple under-tile roof waterproofing of residences, the bottom line is one: ALCHIMICA is the only provider you need!



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