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Malta Business Review BUILDING & CONSTRUCTION Spraying of Polyurea Waterproofing membrane resistant to acid ACID RAIN CAN MELT YOUR DREAM HOUSE AWAY Since the beginning of the Industrial Revolution soiling and degradation of buildings in urban areas has been noticeable. The cause of this has often been attributed to the effects of air pollution. The pollutants that form acid rain are principally sulphur dioxide and nitrogen oxides; both of these are released from the combustion of fossil fuels like coal and oil. Acid rain is precipitation that is much more acidic than normal rainfall. Other than having detrimental effects on animal and plant life, acid rain can also cause considerable damage to buildings, including homes. By Antoine Bonello The chemicals that are found in acid rain can cause damage to certain materials that are used to build homes, mostly to limestone, marble, carbon-steel, paint and some plastics. Stone decay can take several forms, including the removal of detail from carved stone, and the build-up of black crusts in sheltered areas. Limestone and marble are two of the main building materials that are used here in Malta. They are vulnerable to acid rain damage, because they contain a mineral called calcite, a substance that will dissolve when it comes into contact with acid. Acid rain can also damage certain types of sandstone that contain carbonate cement, as well as concrete, metals, wood, and paint. The deposition of acid on building materials contributes significantly to the weathering that is caused by natural elements such as rain, sun and wind. While most modern homes are made of materials that are resistant to acid rain, there may be certain parts or structures that are vulnerable to the effects of acid deposition. It is known that steel rods that are used to reinforce concrete will become corroded at a faster rate when they are exposed to acid rain, and concrete can crack and flake as well. Brick crumbling is another major problem that is caused by acid rain as it can dissolve a type of fabric that holds a brick’s silica grains together, thus becoming more porous and weaker. Limestone and marble are two of the main building materials that are used here in Malta. They are vulnerable to acid rain damage Acid rain and ultraviolet rays from the sun can work together to accelerate deterioration. Our flat roofs here in Malta are constantly subject to weather elements and if they are not adequately protected serious damages can happen to the roof. Besides the elements our houses are also subject to structural movements due to our intensive summer heat. These effects of deterioration are constant but slow and most of the time we do not even realise that they are taking place especially on our roofs. The question that one might ask is how can we protect our house roof better so to avoid serious problems. The answer is in the waterproofing system we choose for our roof. Normal protective plastic paint, acrylic and compounds, lack UV resistance and over a short period of time paint will crack, peel, and lose colour and water will eventually seep through. Carpet membranes are also very problematic, they increase heat inside the buildings by as much as 80% and start to deteriorate when subjected to high temperatures. They tear from seams when subjected to building movements and are not recommend on roofs (toxic) where water is collected and stored in wells. The only materials that can withstand today’s building exigencies are resin based. They are designed to withstand structural movements due to their elasticity and can be easily reinforced with fibreglass net when required. Another important feature of this product is its resistance to acids and water stagnation. There is also THERMAL version that besides the already mentioned it is also able to reduce heat intake inside buildings by 90%. No more humid and heat inside the houses and less air-conditioning usage, two solutions in one product the perfect answer for our flat roofs here in Malta. This strong thermal waterproofing liquid resin membrane is guaranteed to last for very long without the need of any yearly maintenance. A good advice if you opt to have your waterproofing needs carried out by third parties, always make sure they are members of the Malta Professional Waterproofing and Resin Flooring Association. Always demand to see the Association’s INSTALLERS CARD. This will save you a lot hassle as improper roof protection by unaccountable or unethical persons can give way to a serious of unwanted damages. Over 54
BUILDING & CONSTRUCTION Malta Business Review 80% of building damages originates from water intake. The result is an endless court case, if you are lucky enough to trace the guys who carried out your works. All this will eventually take years and prove fruitless. <strong>MBR</strong> All rights reserved - Copyright 2018 Hot Sprayed applied Polyurea can withstand UV, Stagnation and Acids. It can also be applied on Wells and Pools NAICI Thermal Protective waterproofing membrane The black stains and cracks are a clear indication of acid and UV rays deterioration leading to water entry The Malta Waterproofing and Resin Flooring Association provide technical knowledge and professional formation to all Maltese installers who wish to improve their workmanship or start a carrier in the waterproofing business. The Association also assists its members by providing the services of a profession advisor when facing challenging situations or other difficulties during their works. The Association also provides its qualified members the Certified Installers Card. This is done to reassure the general public that the person is able to carry out the requested job at its best. All this is being made possible thanks to Resin and Membrane Centre and NAICI International Academy. For further information with regards the Malta Professional Waterproofing and Resin Flooring Association visit our website on www.maltawaterproofing.com or call on 27477647 www.maltabusinessreview.net 55
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