Polyurethane Roofing

Polyurethane Roofing

Combo Roof system –( Polyurethane foam roofing ) Benefits

Combo Roof system have several benefits. Combo Roof system is an assured solution for your roof. It is a combined system of roofing which provides thermal insulation to the roof, complete water proofing of the roof and finishing of the roof. This ensures beautiful looking buildings with no chances of leakage for at least 25 years They can be applied on virtually any roofing surface. The polyurethane foam is a spray in place insulation, thus if you apply Polyurethane foam roofing to your building, It provides thermal insulation which comes in handy in warm countries like the Qatar and reduces the temperature inside the building on a hot summer day from 25 degrees ,you will normally use less energy cooling and heating the building; therefore, reducing costs on your energy bill. Polyurethane foam roofing are weather-resistant and water-proof. The closed cell structure of the spray polyurethane foam (SPF) does not allow water or air to penetrate through the surface, leaving you with a very strong long term investment in your durable sustainable roof.

Spray Polyurethane Foam

We ensure 100% waterproofing as we use multi layered waterproofing products, We start by our spray application of foam to assure total bonding with the roof and then apply the final liquid coating to secure it 100%. It is the fastest way to insulate and water proof your roof without even having any joints. It has been approved by the top authorities . Benefits of Combo Roof System:- 100% Waterproofing 20-25 year guarantee Perfect finish Easy repair and low maintenance Most efficient thermal insulation,. It also provides thermal shock resistance as it is elastic enough to not break through the expansions and contractions of the roof during weather changes from summers to winters and vice versa.It also increases the lifetime of roofs making them stronger. It meets the requirement of green building regulation

Polyurethane Roofing

Combo Roof Application Procedure

Site Preparation

Upon casting and complete curing of roof slab, ROOF CARE’s 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 Application

Upon completion of cleaning, spray application of the 1st shall commence where a combination of Polyol & MDI is sprayed onto the roof slab including up stands using Graco combination equipment. The spray applied foam in liquid state hits the slab at a high pressure and penetrates every crack and pin holes that exist on the slab. In minute it expands 30 times its volume and solidifies thereby sealing the entire substrate. The foam creates an impermeable waterproofing cum insulation layer with high thermal resistance, closing all pores and cracks that exists in the roof slab.

UV Protection Coating

On completion of polyurethane foam application, Acrylic liquid UV protection coating shall be applied over entire foam to protect it from UV rays till the water test procedure is completed.

Flood Testing the Roof

Once acrylic UV coating is completely dried (minimum 24 hours), Our Engineer will visit the site to inspect the works completed and give clearance for flood test (minimum 24 hours), On successful completion of flood test a test report shall be prepared and maintained for records.

Panelling and Screed Laying

Upon successful completion of flood test, water shall be removed and geo-textile (120gsm) membrane shall be laid as a protection layer over the entire roof area and our crew will do the paneling work using expansion joint filler board and pre-mixed cementitious adhesive mortar to attain the desired slope levels prior to commencement of screeding works.

Protective screed of 300 OPC 10 mm aggregate, 25 N/mm2 strength screed will be laid in panels. Minimum thickness of the screed will be 45 mm and average thickness will be 80 mm. The screed will be finished manually by our trained masons and cured as per standard procedures. The screed is added with plasticizers and micro fibres to avoid crack.

Angle Fillets and Joint Treatments

Angle fillets are done after application of PVA bonding agent to the corners of size 100×100 mm. Once screed is completely cured, all construction joints shall be opened and treated using heavy duty PU Polyurethane sealant and backing rod for accommodating movement of the concrete during expansion and contraction.


Once sealant applied is completely cured, acrylic cementitious coating shall be applied over entire screed including upstands to form a uniform coating of maximum thickness 1000 microns. This coating provide aesthetic look to the roof.

Polyurethane Roofing

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 roof


Water proofing and damp proofing for underground structures such as foundations, walls tanks etc using:

  • EPDM systems
  • APP and SBS modified bituminous membrane systems
  • PVC, HDPE, TPO, and hip alone membrane systems
  • Hot and cold fluid applied water proofing Roof and thermal insulation using:
  • Built-up roofing systems
  • Inverted and conventional roofing systems
  • Polyurethane sprayed in- situ systems
  • Liquid applied roofing system
  • All roof retrofit systems
  • Water proofing for wet areas such as: Kitchens, bathrooms, laundries, planters
  • Environmental and geo-Synthetic solutions and lining systems for containment structures ponds, canals, lagoons, evaporation and irrigation
  • Tunnels lining solutions and systems
  • Design and installation for expansion joints and sealants
  • Light weight foam and other low density involving concrete

Polyurethane Roofing

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