New Roof Waterproofing: Everything You Need To Know

What is Roof Waterproofing?

Roof waterproofing is the process of applying a protective layer to your roof to prevent water from entering your home. This avoids the serious damage that can be caused to your roofs, walls, and your belongings. Moreover, addressing vulnerable areas, such as waterproof bathroom walls, ensures a comprehensive moisture barrier within the structure.

What is the Process Involved in Waterproofing a New RCC Roof?

Step 1: Inspection, Surface Preparation, and Cleaning

The first step is to thoroughly inspect and treat the roof for any damage, such as cracks, honeycombs, etc. All such defects should be repaired with crack fillers like POLYFILL AR or filled with polymer-modified mortar (POLYALK EP: cement: graded quartz sand::1:5:15) Construction joints should be identified and grouted. Expansion joints should be properly filled and covered with a mechanical joint sealing system or any other suitable means. Proper surface preparation, repair, and treatment are extremely critical to ensure the success of a roof waterproofing job. The roof surface must also be cleaned of debris, dirt, and moss to ensure good adhesion for the waterproofing materials. The surface should also be free of standing water and dry.

Step 2: Flashing and Drainage 

It is significant to pay extreme attention to some common entry points to the leaks such as chimneys, vents, and skylights. Proper flashing should be installed around these areas to direct water away from the roof. Additionally, the direction of the slope, gutters, and downspouts should be checked to ensure that they are functioning properly to drain water off the roof without any problem.

Step 3: Primer Application 

Depending on the chosen waterproofing material, a primer might be applied to the clean and dry roof surface. This helps improve adhesion and prepare the surface for the waterproofing membrane. Allow the primer to cure as per the manufacturer’s recommendation.

Step 4: Waterproofing Membrane Installation

The chosen waterproofing membrane is then installed according to the manufacturer’s instructions. This can involve rolling out pre-fabricated sheets, applying liquid coatings, etc. Different materials might require specific tools and techniques.

Step 5: Inspection, Testing, and Protection

After the waterproofing materials have cured completely, a final inspection is done to check the installation and ensure that there are no gaps or inconsistencies. It is advisable to hydro-test the roof to confirm water tightness. Finally, it is recommended to install a protective layer (tiles, IPS, etc) over the fully tested installed waterproof membrane to prevent mechanical damage.

Step 6: Maintenance

Regular maintenance is crucial for the longevity of your waterproofing of the roof. This includes periodic inspections for any damage or wear, keeping gutters and downspouts clean, and removing debris from the roof surface.

What are the materials used in waterproofing a new roof?

There are numerous materials used in the waterproofing roof coating. However, the choice of materials depends on several factors such as roof type, climate, budget, durability, etc. The following are a few materials that are required in the process of waterproofing.

Liquid Applied Membranes

These form seamless barriers, ideal for complex roof shapes and various materials. Polyurethane offers exceptional elasticity and UV resistance for large roofs, podiums, and water-retaining structures. Acrylic liquid membranes are high elongation yet cost-effective options for smaller roofs and wet areas.

Pre-formed Sheet Membranes

Preformed membranes are sheets of waterproof material made from synthetic polymers. They come in various thicknesses and can be installed on both flat and sloping roofs. Unlike traditional asphalt-based membranes, they don’t require torch application and often come with heat-welded seams or self-adhesive seams for enhanced watertightness.

Metal Roof Coatings

Used on metal roofs to protect against rust and corrosion while offering waterproofing. Different types cater to specific needs and durability requirements.

Benefits of Waterproofing Your Roof
Prevents Water Damage

The primary benefit of having your roof waterproofed is its ability to prevent water from seeping into the building. This helps in avoiding issues like ceiling leaks, dampness, and corrosion damage to the structure

Reduces Maintenance Costs

Waterproofing the roof can significantly reduce the need for frequent repairs and maintenance

Improves Energy Efficiency

Waterproofing materials often reflect sunlight and heat, helping to keep buildings cooler in hot weather. This can reduce the need for air conditioning, leading to lower energy bills and improved energy efficiency.

Structural Protection

Water infiltration can weaken the structural integrity of a building over time. Waterproofing protects the roof and the overall structure from potential damage caused by water penetration.

Enhances Aesthetic Appeal 

A waterproofed roof can maintain its appearance longer, as it is less prone to the growth of algae, fungi, and other organisms that can cause discoloration and deterioration.

How Can Sunanda Global Help?

Sunanda Global is the best waterproofing company in India, dedicated to revolutionizing the construction industry. We, at Sunanda Global are committed to offering the best waterproofing solutions with consistent quality. We are highly invested in our Research and Development efforts to innovate and introduce advanced waterproofing products and methods. Our team of experts constantly explores new technologies and materials to improve the effectiveness and longevity of our waterproofing solutions. 

Connect with us for your waterproofing needs and experience unparalleled service that sets the standard in the industry. At Sunanda Global, we don’t just provide products; we offer comprehensive solutions tailored to your specific requirements. Whether it’s a residential project, commercial building, or large infrastructure, our dedicated team is ready to assist you at every step, from initial consultation to final application.

Here Are Some of Our Products for Waterproof Roof Coating

SUNKOTE WP+: Acrylic waterproofing membrane

POLYALK WP waterproofing solution

SUNPROOF PU1K: Waterproofing and sealing membrane

POLYTANCRETE IWL: Integral waterproofing liquid admixture for mortar and concrete

SUNACE: 100% acrylic, decorative, waterproofing, heat-insulating, exterior coating