Why Roof Waterproofing is Important?

Protection from Water Damage: The primary purpose of roof waterproofing is to protect the interior of a building from water damage. Water infiltration through the roof can lead to a range of costly and potentially dangerous issues, including:

Structural Damage: Prolonged exposure to water can weaken the structural integrity of the building, causing beams, trusses, and other components to rot or deteriorate.

Mould and Mildew Growth: Moisture in the building can create ideal conditions for mould and mildew growth, which can negatively impact indoor air quality and pose health risks.

Interior Damage: Water leaks can damage ceilings, walls, insulation, and electrical systems. It can also harm valuable possessions and furnishings.

Building material preservation: Waterproofing helps increase the lifespan of the various roofing components and the complete roofing system. It keeps roofing materials like shingles, tiles, or membranes from degrading through the penetration of water.

Energy Efficiency: Energy efficiency may be improved with a waterproof roof. It decreases the requirement for heating in cold areas by keeping water from entering the structure and limiting heat loss. It helps maintain a stable interior temperature in hot regions, lowering the need for cooling.

Cost savings: In the long term, efficient roof waterproofing may save a lot of money by preventing water damage. Repairing water damage, particularly structural damage, can be quite expensive compared to taking precautions.

Which waterproofing service will be good for the Roof waterproofing?

  1. Bitumen Membrane waterproofing.
  2. Chemical waterproofing.
roof waterproofing

Why Bitumen Membrane waterproofing Is the Number 1 best service on the roof waterproofing?

For many roofing applications, especially flat or low-slope roofs, bitumen membrane waterproofing is a common alternative. It is frequently regarded as one of the finest solutions for various reasons:


  1. Proven Performance: Bitumen membrane roofing systems have a long history of success and have been used in the roofing industry for many decades. They have a track record of durability and reliability.
  2. Waterproofing Properties: Bitumen membranes are highly effective at preventing water penetration. They create a seamless, waterproof barrier that can withstand moisture and prevent leaks.
  3. Versatility: Bitumen membranes can be used on various types of roofing substrates, including concrete, metal, and wood. This versatility makes them suitable for a wide range of roofing projects.
  4. Strength and Durability: Bitumen membranes are known for their strength and ability to resist damage from UV rays, weathering, and foot traffic. This durability means they have a longer lifespan compared to some other roofing materials.
  5. Cost-Effective: Bitumen roofing systems are often cost-effective when compared to other roofing options, especially for large commercial or industrial roofs. They offer good value for money.
  6. Ease of Installation: Bitumen membranes can be relatively easy to install, especially when using torch-down or self-adhesive systems. This can reduce labor costs and installation time.
  7. Repairability: If damage occurs, bitumen membranes are typically straightforward to repair. You can often patch or reseal damaged areas without having to replace the entire roof.

It’s crucial to remember that the selection of roofing materials is influenced by a number of variables, including your project’s unique requirements, the environment, your budget, and building codes. In all circumstances, bitumen membrane roofing might not be the ideal option. It’s crucial to speak with a roofing expert who can evaluate your requirements and suggest the best roofing system for your specific situation.

The long-term performance of any roofing system, including bitumen membranes, depends on frequent maintenance and good installation.


Procedure of Bitumen Membrane Waterproofing.


Bitumen membrane can be applied using different methods depending on the specific product and application requirements. Here are three common methods of applying bitumen membrane:

  • Torch-Applied Method: This method involves using a propane torch to heat the bitumen membrane and adhere it to the substrate. Here are the general steps for torch-applied application:
    a. Surface Preparation: Ensure that the substrate is clean, dry, and free from any debris or loose material. Remove any sharp protrusions or irregularities from the surface.
    b. Priming (if required): Apply a suitable primer to enhance adhesion between the substrate and the bitumen membrane. The primer selection depends on the substrate type and the manufacturer’s recommendations.
    c. Roll Placement: Unroll the bitumen membrane onto the prepared surface, aligning it correctly. Overlap the adjacent rolls as per the manufacturer’s guidelines to ensure a watertight seal.
    d. Heating and Adhesion: Use a propane torch to heat the underside of the bitumen membrane as well as the substrate. Gradually move the torch over the membrane to melt the bitumen, allowing it to adhere to the substrate. Apply pressure with a roller to ensure proper bonding and eliminate air pockets or wrinkles.
    e. Sealing: Pay attention to critical areas such as corners, edges, and penetrations. Use additional heat and pressure to create secure seals and ensure waterproofing integrity.
  • Self-Adhesive Method: Some bitumen membranes come with a self-adhesive backing, eliminating the need for heating equipment. Here’s an overview of the self-adhesive application process:
    a. Surface Preparation: Prepare the substrate by ensuring it is clean, dry, and free from dust, grease, or any loose material.
    b. Roll Placement: Unroll the bitumen membrane onto the prepared surface, aligning it correctly. Apply pressure with a roller to ensure proper adhesion and eliminate air pockets.
    c. Sealing: Pay attention to critical areas such as corners, edges, and penetrations. Use additional pressure to create secure seals and ensure water resistance.
  • Mechanically Fastened Method: In this method, the bitumen membrane is secured to the substrate using mechanical fasteners such as screws or nails. Here’s a general outline of the mechanically fastened application:
    a. Surface Preparation: Prepare the substrate by ensuring it is clean, dry, and free from any debris or loose material.
    b. Roll Placement: Unroll the bitumen membrane onto the prepared surface, aligning it correctly. Secure the membrane using mechanical fasteners, following the manufacturer’s recommendations regarding spacing and placement.
    c. Sealing: Pay attention to critical areas such as corners, edges, and penetrations. Use additional bitumen-based sealants or adhesives to create secure seals and enhance waterproofing.

It’s important to note that the specific application method may vary depending on the manufacturer’s instructions, the type of bitumen membrane used, and the project requirements. It is recommended to refer to the product’s technical data sheets and follow the manufacturer’s guidelines for the proper application of the bitumen membrane. Additionally, it is advisable to consult with waterproofing professionals or contractors who have experience with bitumen membrane installation.

Roof waterproofing
Why Chemical Waterproofing is the Number 2 best service on the roof waterproofing?

The effectiveness of different waterproofing methods for roofs depends on various factors, including the specific needs of your project, the type of roof, climate conditions, budget, and building codes. Chemical waterproofing is indeed a viable option for many roofing applications, but it may not always be the best choice in every situation. Here’s why chemical waterproofing is often considered an alternative to other methods:


  1. Application Complexity: Chemical waterproofing often involves the use of coatings or treatments that require precise application techniques. It can be more complex to apply correctly, especially for DIYers or contractors who are not experienced with these specific materials.
  2. Limited Compatibility: Chemical waterproofing may not be compatible with all types of roofing materials. It may work better on certain substrates or in specific conditions, and it may not be the optimal choice for roofs with existing roofing systems or intricate designs.
  3. Durability: While chemical waterproofing can provide excellent waterproofing properties, its durability can vary depending on the quality of the product used and the application method. Some chemical waterproofing materials may require more frequent reapplication or maintenance compared to other roofing systems like bitumen membrane or metal roofs.
  4. Cost: The cost of chemical waterproofing materials can vary, and high-quality products may be relatively expensive. When considering long-term costs, it’s essential to factor in potential maintenance or reapplication costs.
  5. Environmental Considerations: Some chemical waterproofing products may contain volatile organic compounds (VOCs) or other chemicals that can raise environmental and health concerns. Ensure that you choose environmentally friendly options if sustainability is a priority.
  6. Surface Preparation: Chemical waterproofing often necessitates thorough surface preparation, including cleaning and, in some cases, priming. Failing to prepare the surface adequately can lead to subpar results.
  7. Roof Slope: Chemical waterproofing may be better suited for flat or low-slope roofs. In contrast, other methods like bitumen membranes or metal roofs may be more appropriate for roofs with steeper slopes.

It’s crucial to stress that chemical waterproofing is not always preferable to other techniques, even if it might be a good option for specialized applications like concrete roofs or roof decks. The ideal roofing solution will rely on the specifics of your project and the guidance of a knowledgeable roofing expert who can evaluate your demands and provide the most appropriate system for your specific situation. Any roofing system must also be installed and maintained correctly to function at its best over time.


Procedure of Chemical Waterproofing Roof waterproofing

Chemical treatments or coatings are used to establish a waterproof barrier on the surface of roofs during chemical waterproofing. A general process for chemically waterproofing a roof is as follows:


Note: It’s important to consult with a professional roofing contractor or waterproofing specialist for your specific project, as the procedure can vary based on the type of roofing material and the condition of your roof.

  1.  SURFACE PREPARATION: Clean the surface with a wire brush or scrubber to remove hidden dirt, loose particles, laitance & dust. Degrease the surface by using suitable solvents. } Repair the spalled concrete portion by the saw, cutting the extreme edges of the repair location to a depth of at least 10 mm to avoid featheredging & to provide a strong bond. Clean the concrete surface to remove any contamination where breaking is not possible. Roughen the surface by light scrabbling or grit blasting.  For priming of the concrete substrate, the surface should be thoroughly saturated with potable water. Remove any excess of water prior to application.
  2.  WATERPROOFING COATING: For a waterproofing coating  Cement in the ratio 1:1.5 by volume. Mix for 2-3 minutes to avoid air entrapment. Keep on slowly adding cement to the chemical until the required consistency is achieved. SBR L ate x for waterproofing & repairs chemical  Building Repairs chemical  Brush apply 2 coats of the mix in a span of 4-6 hours on the prepared concrete substrate. Overlay the coating with a protective screed to the desired slope & thickness.
  3. BONDING PRIMER: For a bonding primer coat of chemical Cement in the ratio 1:1 by volume. Brush and apply 1 continuous coat of the mix on the prepared concrete substrate. Ensure to overlay the repair mortar when the bond coat is still tacky.
  4.  REPAIR MORTARS & RENDERS: A suitable mix ratio for patching repair mortar or render is as follows: Mix design – Portland Cement: 50 kg, Washed sand: 150 kg, chemical: 6-7.5 kg & Water: 10 Lit
  5. FLOOR SCREEDS & PCC: A suitable mix ratio for patching repair mortar or render is as follows:  Mix design – Portland Cement: 50 kg, Washed sand: 75 kg, 6 mm downsize aggregates: 75 kg, chemical 6-7.5 kg & Water: 10 Lit
  6.  MIXING & APPLICATION: A forced action mixer is essential (PAN Mixer) & recommended to ensure that chemical mortar is thoroughly mixed. Use a suitable-sized drum with a heavy-duty electrical drill machine fitted with a spiral paddle mixer at the slow speed of 400-500 rpm. Hand mixing is permissible only for 25 kg or less quantity.  Charge the mixer with the required quantity of clean & dry sand(or coarse aggregates as needed), cement & mix for 1-2 minutes, then add the recommended dosage of chemical dispensed in water which is pre-batched. Mix for 2-3 minutes to avoid air entrapment. Keep on slowly adding water until the required consistency is achieved.
Roof waterproofing by chemical waterproofing