DryZone Insulation Waterproofing
Company in Dubai,Abu Dabi,
Sharja,UAE
The Combo Roof Waterproofing System is an advanced, fully integrated solution that combines both thermal insulation and waterproofing in a single application. Applied directly over the concrete substructure, this system includes multiple layers such as polyurethane foam, rubberized coating, geotextile, screed, and cementitious coating — all working together to protect the roof from water penetration and heat transfer.
Unlike traditional methods that apply insulation and waterproofing separately, the Combo System ensures complete bonding with the structure, eliminating gaps, weak points, and potential leakage areas. The addition of critical elements like expansion joints, backing rods, sealants, and angle fillets provides extra flexibility and durability, especially under the harsh weather conditions of the UAE.
This system offers several key benefits. It saves space on the roof, reduces energy consumption by improving thermal resistance, and enhances the building’s lifespan. The materials used are UV resistant, highly durable, and require minimal maintenance over time. The Combo System is widely approved across Dubai and is ideal for villas, residential, and commercial buildings where long-lasting protection and energy efficiency are essential.
Stage 1: PU Foam Spray (60–70 mm)
The first stage of the Combo Roof System is the PU foam spray, forming a seamless, insulating, and waterproof base layer. Applied at a thickness of 60–70 mm, the foam expands to fill gaps and uneven surfaces, providing excellent adhesion, high compressive strength, and thermal insulation. This layer also acts as a moisture barrier, ensuring long-term roof durability and creating a stable foundation for subsequent protective coatings.
Stage 2: RBE Bitumen Primer Application
The second stage of the Combo Roof System is the RBE bitumen primer, applied directly over the cured PU foam layer. This primer ensures strong adhesion between the insulation and the subsequent protective coating, sealing the surface and enhancing waterproofing. It creates a uniform, tack-free base that improves the durability and performance of the final roof system.
Stage 3: Water Test (After Rubberized Coating)
The third stage of the Combo Roof System is the water test, conducted 24 hours after applying the rubberized protective coating. This test ensures the roof is fully waterproof and free from leaks or weak spots. By simulating real-life water exposure, it verifies the effectiveness of the insulation and coating layers, confirming the system’s durability and reliability before final handover.
Stage 4: Geotextile Layer & Ridges
The fourth stage of the Combo Roof System involves applying a geotextile layer over the cured waterproofing coatings, along with the formation of ridges as required. The geotextile acts as a protective barrier, enhancing durability, preventing mechanical damage, and distributing loads evenly. Ridges improve water drainage and ensure proper roof slope, contributing to long-term performance and reliability of the system.
Stage 5: Screed Laying and Leveling
The fifth stage of the Combo Roof System is screed laying and leveling, applied over the geotextile and ridges. This layer provides a smooth, even surface, ensuring proper slope for drainage and preparing the roof for the final protective coating. Screed enhances structural strength, distributes loads evenly, and contributes to the long-term durability and performance of the roof system
Stage 6: Angle Fillet
The sixth stage of the Combo Roof System is the formation of the angle fillet around the parapet walls. Once the screed work is completed, the angle fillet is created at the junction between the roof slab and parapet wall to ensure a smooth transition and avoid sharp corners that may cause cracking. This stage ensures proper bonding for the skirting application and maintains complete waterproofing continuity across all roof and wall junctions.
Stage 7: Backing Rod & Sealant
The seventh stage of the Combo Roof System involves the application of a backing rod and sealant into all expansion and construction joints. The backing rod is first inserted to control the depth of the sealant and ensure proper joint movement. High-quality elastic sealant is then applied over it to create a flexible, watertight seal that accommodates thermal expansion and prevents water ingress through joint areas, ensuring long-term roof integrity
Stage 8: Final Coat
The eighth and final stage of the Combo Roof System is the application of the final protective coating. This layer provides UV resistance, weather protection, and enhances the overall durability and appearance of the roof. The final coat seals the surface completely, ensuring long-term waterproofing performance and protecting all underlying layers from environmental exposure and wear.
