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FAQ

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AL Safi manufactures the most innovative liquid
waterproofing products for terraces, balconies, podium,
Exterior and Interior walls, tanks, roofs, parking areas,
basement, Industrial, foundation, concrete and cement
structures. They are suitable to waterproof both with
negative and positive pressure and they can be applied by
air-less, roll or brush.
These materials are multipurpose, fast and easy to apply,
it is studied and designed to overcome the application
problems of the traditional waterproofing systems.

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Why do you recommend waterproofing?

The permeate water to our buildings causes corrosion of the irons which placed in carrier parts
of our buildings and reducing of the carriage capacity. The water causes corrosion and cracking of the concrete. Water insulation application helps us for healthy and comfortable environment by not only providing the safety of the building but also providing to protect bacteria and mold growth, by preventing the leakage of the water from our roofs and ceilings.

Why roof waterproofing has become essential?

Any building needs an external protection just like a “skin” to avoid its deterioration through the
effects of natural elements and weathering. As part of the building envelope, roofs have a decisive role in the durability of the structure as, being the top surface of the building; prevent water penetration through horizontal or slightly inclined surfaces. All these factors make roofs as one of the most critical parts in a structure.

Why Combo Roof System is preferred?

Combo Roof system is a comprehensive system comprising of waterproofing, thermal insulation
and finishing for the roof. This unique system is a technically advanced fast curing. This system provides a manufacturer’s Guarantee of 25 years against any leakage. The system meets all latest thermal insulation standards and regulations in UAE and is accepted by all major property developers, consultants and contractors. Combo Roof system is an assured solution for your
roof.

What are the Benefits of Combo Roof System?

  • Joint free insulation & waterproofing with 25 years manufacturers Guarantee.
  •  Load Bearing Capacity up to 2½ Tons per Sq.Mtr.
  •  Single submittal & approval for the entire system.
  •  Roof tiles not required.
  • Fully mechanized time saving installation procedures.
  •  Ability & capacity to undertake fast track projects.
  • Easy repair & maintenance.
  •  Multilayer Waterproofing.
  •  Lower electricity consumption due to better insulation.
  •  Thermal shock resistant roofrutrum vitae.

How Combo Roofing is applied?

  • Surface Preparation
  • Application of Polyurethane Foam Spray
  • Application of Zolvtek Rubberized Bitumen Emulsion
  • Water test by Main Contractor
  • Spreading of Geotextile
  • Application of read mix screed
  • Top Coat

What is the need for waterproofing exterior walls?

External walls are built with masonry to fill the spaces in the RCC frame containing slabs, beams,
and columns. This lends itself to seepage of rain from the external walls to the interiors. Cracks in plasters lead to water seepage. What is required is a high-performance waterproof coating that would prevent seepage of water from the external walls to the interiors of the building.

What is the need for waterproofing kitchen & Bathroom?

A bathroom or kitchen not waterproofed can ruin interiors, hassle residents, and incur significant repair costs in the future.

What is the need for waterproofing water tanks?

Seepage and leakage from overhead and underground tanks spoils the décor, helps the growth of algae and fungus and leads to weakening of the structure. Such areas hence need to be waterproofed but also at the same time safe for potable water.

What is the need for waterproofing in Foundation?

Due to the capillary movement of water, the water rises from the soil to the building. As it passes
through the foundation, it rises higher and reaches the walls. So, to prevent the water from reaching the walls, a damp-proof course is laid at the plinth level.

What is waterproofing / Damp proofing of a basement?

Damp-proofing is usually done during construction to meet minimal building protection
requirement. Damp-proofing is designed to ‘retard’ moisture penetration, not prevent it. Zolvtek provides fibered Emulsion Damp Proofing


Waterproofing is required to prevent moisture seepage involving hydrostatic pressure bearing against the external. Foundation waterproofing systems are applied externally to the foundation,effectively preventing water penetration from seeping through the foundation.

How regularly does the structure need to be waterproofed?

If waterproofing is carried out comprehensively with proper care & good quality products then
you can consider your home waterproofed for several years to come. However, in cases of structural repairs, modifications & alterations in the structure subsequent need for Zolvtek waterproofing products will be needed.

How many coats do I need to apply?

Normally two coats are applied, leaving a few hours between application of each coat.

Is the Zolvtek affected by temperature, humidity, ultraviolet and oxygen levels?

When applied according to specifications, Zolvtek performs at 100% efficiency within -25°F to +265°F (-32°C to +130°) constant temperatures or within -301°F to +2786°F (-185°C to +1530°C)periodic temperatures. Humidity, ultraviolet and the oxygen level (oxidation) have no effect on a Zolvtek coating.

Can Zolvtek be used against extreme hydrostatic pressure?

Yes. Because Zolvtek is not dependent upon adhesion to the concrete surface and, instead, becomes an integral part of the concrete mass, it is capable of resisting extreme hydrostatic pressure from either side (positive or negative) of the concrete.