Combo Roof is a comprehensive roofing system comprising of waterproofing, thermal insulation and finishing, for the roof. This unique system is technologically advanced, fast curing and certified by Dubai Central Laboratory (DCL) for its joint free waterproofing and thermal insulation characteristic, that is fully bonded to the roof slab. ComboRoof system is one of the most efficient solutions for energy efficiency on buildings. This system provides a manufacturer’s Guarantee of 30 years against any leakage. The uniqueness of this system is that the manufacturer and the applicator is the same. The system meets all latest thermal insulation standards and regulations in UAE and is accepted by all major property developers, consultants and contractors. The system is also approved by various authorities like Dubai Municipality, Sharjah Municipality, Sharjah Water and Electricity authority and Trakhees; Combo Roof system is an assured solution for your roof.

Procedures :

• Surface preparation 

Upon casting and complete curing of roof slab, engineer shall visit the site to inspect the roof and accept the roof for waterproofing and heat insulation works. A preliminary site inspection shall be carried out and any further preparation work if required shall be brought to the attention of the main contractor.

• PU Foam application

Spray Applied Polyurethane Foam: Waterproof Insulation Polyfoam rigid polyurethane systems are two components based on blended polyol and polymeric MDI. PU form in the Combo Roof System acts as both waterproofing and thermal insulation. PU form systems are available in four nominal density grades 45-50 kg/m³

• UV protection coating

Single component, acrylic waterproofing and protective coating. It is durable, flexible and has a high level of resistance to U.V. exposure and aggressive weathering agents. It is resistant to dilute acids, alcohol, petrol, carbonation and chloride ions.

• Panelling and screeding 

Geotextile- Non-Woven Polyester Separation Layer Geotextile separation layer is a high-quality geotextile fabric of non-woven polyester. It is intended to act as a separation layer between products and also to increase the puncture resistance of the waterproofing assembly.

• Expansion board

Compressed Wood Fibers, Filler Board consists of compressed wood fibers from timber, impregnated with Bitumen Emulsion which complies in general with requirements of the American and British Standard Codes of Practice.
Screed Concrete – Protective fibre reinforced screed concrete SCREED CONCRETE with fibre reinforcement laid in slope 1:150, having 45mm thickness at drainage point and increasing away from the drain.

• Angle fillet and joint selant 

Sealant – One Part Polyurethane Joint Sealant is a single part low modules high performance polyurethane sealant, which cures on absorption of atmospheric moisture to form a firm and flexible rubber watertight seal for moderate movement of control joints. PU sealant will be used in horizontal joints between screed panels.

• Finishing 

Highly efficient, energy saving flexible coating (SRI >78) is water-based pure acrylic resin proving efficient thermal protection for the roof which is a non- toxic, washable & environment friendly forming a seamless membrane that resists many harsh chemicals & bridges hairline cracks. This coating has high emittance & reflectance as well as a very low conductivity value which reduce thermal shock & heat penetration thereby keeping roofs much cooler in hot summer weather. They offer U.V. protection & display excellent dirt pick-up resistance and retain their flexibility long after aging.

Inverted roofing system

Inverted roofs increasingly are becoming a popular alternative to traditional roofs as their benefits have become more apparent. Simply defined as a type of roof construction where the waterproofing layer lies beneath the insulation instead of above it — as in other forms of roofing — inverted roofs ensure that the complete roof construction, including roof covering, is kept at warm temperatures during winter months and at moderate temperates during the summer months.

Also known as a “protected membrane” or “upside down” roof, inverted roofs employ insulation which can resist water absorption, provide excellent thermal performance, be unaffected by freeze and thaw cycles, withstand surface traffic and be protected from UV and mechanical damage, among others. While traditional roofs place the insulation under the protective membrane, inverted roofs are designed with the waterproofing layer, usually a liquid-applied membrane, beneath the insulation. Insulation boards are loose-laid on top of the membrane and then weighted down with paving slabs, gravel ballast or soil medium in the case of ‘green’ or vegetative roofs.

Why Inverted roofing system ?

• Cut total roof-life costs

Roofs are significant investments, as they impact nearly every other function and feature of a building. Inverted roofs typically last longer than traditional ones.Inverted roofs have significantly lower maintenance costs than conventional low-slope roofs, thanks in large part to the insulation in the inverted assembly protecting the roof membrane from mechanical damage during and after construction, as well as temperature extremes that cause stress. It also protects against ultraviolet radiation that can lead to premature failure. This enhanced durability, combined with reduces annual energy costs, can reduce total roof-life costs up to 22 percent.

• Improve environmental performance

While the enhanced longevity and energy efficiency afforded by inverted roofs is good for the wallet, it’s also good for the planet. Due to the fact that the insulation, fabric and ballast are loose-laid and therefore can be more easily reused, inverted roofs help reduce downstream waste during construction, maintenance and demolition phases of a building’s life..
Because inverted roofs place insulation on top of the membrane, this provides a perfect foundation for a terrace, garden or green roof on the top of the building. Research shows that even on a hot and sunny day, the temperature of the roof surface below a green roof can be cooler than the ambient air around it — greatly reducing the effects of the sun’s energy on the interior temperature of the building and reducing the urban heat island effect compared to conventional roofing. Reduced energy demands lightens the burden on the grid — which in most regions means reducing the amount of fossil fuels or natural gas that must be burned to generate power. Alleviating the urban heat island effect means that less of the sun’s energy is reflected back into the atmosphere, which is a contributor to global warming.

• Better storm water management

As the impacts of climate change make weather patterns more unpredictable — often resulting in too little or too much rain — building resilience increasingly is relying on the ability to handle storm water overflow. With even a fraction of an inch of rain being capable of overwhelming some combined sewer systems, cities are acting to prevent overflow from polluting local rivers and waterways.

• Improve occupant satisfaction

As more people spend more time than ever before in urban environments, there is a growing need to reconnect with nature. While traditional buildings tend to make people feel cut off from natural environments, making the roof a usable, walkable space with natural amenities can help bridge this disconnect and make your building’s occupants happier and more productive.
By adding more of an outdoor, park-like aesthetic to the building, occupants are more likely to be healthy, happy and helpful. Employees who work in environments with natural elements reported a 13 percent higher level of well-being and are 8 percent more productive overall, according to one report. Besides this being a good thing in and of itself, this also can help attract businesses and other tenants by serving as a key differentiator from traditional buildings.

• Preserve local habitat

Just as green roofs can make people happier, they also can benefit the local wildlife. As cities swell and continue to encroach on nature, there is a growing need to infuse urban landscapes with the elements of natural environments. With the world on track to lose two-thirds of its wildlife by 2020, this is more important than ever.
A strong insulation choice is essential to extract the benefits and longevity of an inverted roof. An extruded polystyrene (XPS) insulation delivers the proven, long term performance for the life of the roof.

Steel deck roofing system

The coatings based on 100% polyurethane resins, which used in combination, create a seamless membrane on the roof, terrace or deck that protects the building structure reliably and on a long term basis, even under the most difficult conditions.