September 26, 2020

Best Waterproofing methods for ROOF 

Best Waterproofing Method for Roof External Wall. Flat Roof Terrace is the most crucial segment for building. For Waterproof repair solutions generally used cementitious material and bituminous material. Waterproofing in buildings and structures are generally required for basement of structure. water cannot run off the structure quickly, and will move slowly or pool above the surface, creating opportunities for leakage.

Best Waterproofing methods for ROOF, Building House

Roofs can be constructed from a wide variety of materials either cementitious material and prefabricated material. Repair of damaged structure due to seeping water is a very costly affair. Hence proper waterproofing of building at construction stage is essential. Water leakage segment exposed to direct climatic variations, extremes of rainfall and structural movements.

Reinforced cement concrete buildings needs waterproofing as concrete itself will not be watertight on its own material removes all the problems of flat roofs except that the roof should be made water proof by employing any of the various methods available for moisture proofing.

The best way to waterproof a flat terrace is to use a waterproofing membrane. This is a thin layer of waterproof material that is continuous, and offers no path for water to enter the structure. In new construction, water proofing treatment is required from the foundation stage in case of basement/ underground tanks etc. to the roofing stage. Terrace or roof is the most externally exposed area which faces harsh weather conditions. by seasonal changes winter, summers, such climate changes usually lead to thermal expansions in the ceiling of home.

Most buildings unfortunately don’t offer adequate thermal insulation for the building envelope thereby unnecessarily enhancing its energy usage, carbon footprint and lifecycle costs. These roof coating paints defenses your roof from weather and rains for at least years and offers long-term protection from weather.

Amenities that paint offer are waterproofing, weatherproofing, resist UV rays and more. In order to protect different kinds of concrete surfaces from leakage and dampness. To protect the terrace it should be made properly waterproof. if the entire structure is weak for the reason of poor quality of construction, sub-soil being weak, vibrations from the surrounding pattern of land use too vigorous etc., then terraces are likely to be affected.

The Main Functions

1. Protection from rain
2. Shelter from extreme cold or heat
3. Privacy and safe storage of possessions

Choose the right waterproofing solutions to protect your roof from damping and rainwater penetration.

Types of Waterproofing:

Cementitious Waterproofing.
Liquid Waterproofing Membrane.
Bituminous Membrane.
Bituminous Coating.
Polyurethane Liquid Membrane.

Cementitious Waterproofing: Cementitious Waterproofing is the most used, best resulted waterproofing in construction. The material for Cementitious Waterproofing is easily available from suppliers of masonry products. Mostly this method is used in the internal wet areas such as toilets. note this, cementitious products have no give to them probably because cement just doesn’t stretch to any degree worth mentioning. They will stand up fine to a head of water but will tolerate almost no joint or crack movement. Before applying cementitious systems, substrates must be free of dirt, laitance, form release agents, and other foreign materials. take care while applying.

Water Proofing Membrance: water-proof membrane is a thin layer of water tight material that is laid over the surface. Stagnated water is likely to seep into the structural slab over time. In flat-roofed terrace, the membrane is laid over a filler material that is sloped to ensure that water is drained away by drainage pipes.

Liquid waterproofing Membrance: These are the kind of membranes that come in the form of liquid that can be sprayed or brushed onto the surface. By spraying, the liquid forms a monolithic membrane, with no laps, welds or seams. apply a liquid membrane by spray, roller, or trowel. The liquid cures into a rubbery coating on the wall. One manufacturer has a spray-applied liquid membrane composed of polymer-modified asphalt. This is a good system with a lot of strength, but probably not much elongation ability. produce a similar built-up waterproofing system using cold, trowel-grade dampproofing and reinforcing fabric

Bituminous membrane: Addition of polymer in bitumen improves its workability characteristics, penetration and softening behaviour, tensile and fatigue properties and capacity to bridge movement of cracks / joints in the substrate. Non-woven fibre glass mat and non-woven polyester mat are generally used as reinforcement to improve their characteristics like lap joint strength, tensile strength and flexibility. inspect the finished waterproofing application and confirm the integrity of the seal before backfilling. With bentonite panels, the seal doesn’t form until the foundation is backfilled and water reaches the panel. Its flexibility and protection against water can be influenced by the polymer grade as well as reinforcement of fiber.

Masonary Waterproofing Paints:

Masonry paint, a waterproofing paint for roof is made from a mixture of ceramic and latex paints. this paint never allows rainwater to penetrate inside and keeps the roof dirt-resistant & more durable as well.

Epoxy Waterproofing Paint:
Epoxy paint is made from resins, and the chemical name of this paint is poly-epoxides.epoxy paints are known as damp-proof paints. Applying this paint on the surface of your roof can protect it from water penetration, chemicals, and even from the concentric acids.

Acrylic Waterproofing Paint:

Acrylic paint provides excellent waterproofing solution and is best suitable in waterproofing paint for roof & waterproofing paint for terrace, built with rectangular blocks. Applying this waterproofing solution on the roof surface along with a primer will ensure your roof’s durability, increases the resistance against water (irrespective of PH level). Whenever rains, the elastic property in acrylic waterproofing solution allows the paint to contract and expel water from the roof surface.

Concrete leaks due to the following reasons:

1. Thermal Variation
2. Long Term Drying Shrinkage
3. Crack In Transition Zone
4. Structural Stresses
5. Creep Deformation
6. Thermal Incompatibility Between Paste & Aggregate
7. Rusting Of Steel
8. Sulphate Action , Moisture Movement Due To Volume Change

How to do Waterproofing Method

Steps to waterproof a roof here provided simple step wise. The first step in waterproofing a roof is cleaning of the substrate. Following cleaning, priming of the surface is designed to improve the adhesion of the membrane. The third step is the treatment of details. Contractors must carefully treat all details and only after this step is completed, should they resume the field application of the liquid membrane.Next step is the application of the liquid membrane onto the roof. There are two kinds of applications of liquid applied membranes; some require the impregnation of reinforcing mat during installation and some do not.

Firstly Washing the Roof-terrace surface and making it dust free. maintain clear way until work starting day.
Filling all the visible cracks by way of specially prepared Silicone crack filler as first method installor
Applying First coat for Filling the invisible cracks & small holes with diluted silicone.
Applying Second & Third coat of Silicone based cement waterproofing to strengthen the surface.
Applying Final Forth Coat of Silicone based cement waterproofing.

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