Water Proofing
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Waterproofing is one of the major business parts of IBN THAMER since its formation. Our professional way of marketing, well-equipped and systemized work handling, and quality control system raised our value in the market. Here is a brief narration of certain different materials used in the water-proofing system which we adopt normally, based on the regional external conditions such as weather conditions, nature of the constructional materials and its durability, thermal transparency etc.
We are mainly using waterproofing membranes which are manufactured from polymer bitumen modified with elastomer and plastomers. The reinforcement is normally upon bonded polyester. Polypropylene, an inorganic substrate used as it is rot proof and has extremely good elongation, resistant to heat, aging, piercing, and puncture. The compound is a mixture of plastomers and elastomers providing excellent durability. Some commonly used waterproofing membranes are listed in the following lines.
Torch Applied Oxidized Membrane
Torch Applied Modified Membrane
Self Adhesive (Cold Applied) Membrane
Liquid Applied: Domes & Corregated roofs
Protection boards are used as permanent protection to most waterproofing and damp proofing systems. They protect the waterproofing membrane from any impact by sharp aggregate during backfill process and later during settlement.
TYPES OF PROTECTION BOARDS
Using the right protection boards is crucial in maintaining the effectiveness and longevity of waterproofing systems. Whether it’s soft boards, plywood, bituminous boards, or expanded polyethylene sheets, each type offers unique benefits tailored to specific construction needs.
These boards act as a barrier, ensuring that the integrity of the waterproofing membrane remains uncompromised during both the construction phase and the natural settlement of the structure. By choosing the appropriate protection board, you enhance the durability and resilience of your building, preventing potential issues that could arise from exposure to external elements.
In extreme hot climates, the high energy demand for air conditioning is constantly increasing. This requires a material to be used in the buildings that could minimize the energy consumption and keep the temperature low for maximum periods. Insulation materials are used in various thicknesses to conserves this energy demand by providing a high class thermal insulation for buildings.
The extruded polystyrene materials that are commonly used in Qatar for the roof insulation are manufactured with sealed cells linked to one another and is produced in accordance with the international standards ASTM. The material has exceptional mechanical properties, resistance to water absorption and diffusion, dimensional stability, high compressive strength, aging resistance and good resistance against bacteria, pests and other micro- organisms.
Thermal Insulation Materials
1. Extruded Polystyrene insulation sheets in different densities such as:
Most common extruded polystyrene material used in Qatar in density range of 32 – 35 kg/M3.
2. Other types of insulation materials include.
For the separation layer, three types of materials are used:
For most of roofing applications, the world-leading brands including Typar and Terram are used. These materials are the non-woven, spun-bonded/needle-punched continuous filament geotextile membrane made by 100% polypropylene. The use of such fiber and a randomly laid web formation offers an optimum physical, mechanical, and hydraulic property to geo-textiles.
The fabric has outstanding toughness and durability, and resistance to rotting, moisture, and chemical attack. The fabric also has good tensile strength, puncture strength, and resistance to loading. These properties make the geo-textile ideal for reinforcement, filtration, and separation layers.
Flexile board made of bitumen-impregnated board is normally used in the roof screed slabs in the expansion joints. The flexile board provides the flexibility of expansion and contraction to the concrete bays in extreme weather conditions and helps to prevent cracks in the concrete bays.
Incorporating Flexcel boards into your roofing and expansion joint systems offers multiple advantages, ensuring long-term performance and structural integrity. The key benefits of using Flexcel boards include:
For normal roofing system, light weight screed is used with minimum density of 2100 Newton/M3.
For normal roofing system, light weight screeding is used with minimum density of 600 Newton/M3.
Sealants are used in waterproofing to seal the concrete joints once the screed is casted bays. The most common sealants used in water proofing systems are the polysulphide sealants where polysulphide polymer is mixed with the hardener which cures to form a tough rubber like seal. These polysulphide sealants exhibit excellent adhesion to most surfaces. They also have good resistant to most chemicals and multi weather conditions. The two most commonly used sealants are pouring grade and gun grade. Pouring grade may be used for horizontal application where as gun grade is applicable for vertical or horizontal applications.
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