top of page
Big Ban.jpeg

Blog Post

Specialist in all aspects of Concrete Waterproofing,  Basement Tanking and Roofing Repairs. 

Writer's pictureBell Asphalt Co.

Self Levelling Flat Roof Repair

Updated: Nov 14

Self-levelling flat roof repair involves applying a liquid membrane that levels itself to provide a seamless, waterproof finish. This method is ideal for fixing small cracks and uneven surfaces.

Self-levelling flat roof repair is a good way to maintain flat roofs. This repair technique uses a liquid membrane. It spreads in a uniform manner to create a smooth, waterproof surface. It effectively addresses minor cracks and irregularities, ensuring long-lasting protection against water damage.

A man in a yellow safety vest performs self-leveling flat roof repair work on a rooftop

Homeowners and businesses prefer this method because it is quick, cost-effective, and durable. Regular maintenance with self-levelling compounds can extend the lifespan of flat roofs. It can prevent costly repairs in the future. This approach improves the roof's look and its performance. It keeps the space below safe and dry.


Common Flat Roof Issues

Flat roofs are popular for many buildings. They have a modern look and are cost-effective. But, like any other roofing system, flat roofs can develop issues over time. Knowing common flat roof problems can help you fix them quickly. This post focuses on two major issues: leaks and water damage, and cracking and ponding.

Leaks And Water Damage

Leaks are one of the most common problems with flat roofs. Water can easily pool on flat surfaces, leading to leaks and water damage. Here are some key points to consider:

  • Poor drainage: Flat roofs need proper drainage systems. Without them, water can accumulate and cause leaks.

  • Damaged membrane: The roofing membrane is crucial for waterproofing. Any damage to it can result in water seeping through.

Signs of water damage include:

  • Stains on the ceiling: These can indicate a leak above.

  • Mould growth: Persistent water leakage can lead to mould, which is harmful to health.

To prevent leaks and water damage, regular maintenance is essential. Inspect the roof for any signs of wear and tear, and ensure that the drainage system is functioning correctly.


A damaged roof with a large central hole, highlighting problems related to cracking and ponding.

Cracking And Ponding

Cracking and ponding are other significant issues with flat roofs. These problems can compromise the roof's integrity and lead to further damage. Consider the following:

  • Cracking: Cracks can appear due to weather changes or poor installation. They can allow water to penetrate the roofing material.

  • Ponding: Ponding refers to water that remains on the roof for more than 48 hours. It can cause structural damage over time.

To identify cracking and ponding issues, look for:

  • Visible cracks: These can be seen on the surface of the roof.

  • Standing water: Water that does not drain away can indicate a ponding issue.

Addressing these problems promptly is crucial. Regular inspections and maintenance can help prevent cracks and ensure proper drainage, thereby extending the lifespan of your flat roof.

Signs Of Damage

Regular maintenance of your self-levelling flat roof is crucial. Identifying the early signs of damage can prevent costly repairs. Understanding these signs ensures your roof remains in top condition.

Visible Cracks

Visible cracks on your flat roof are a clear indicator of damage. These cracks can appear due to various reasons:

  • Weather conditions: Extreme weather can cause the roof material to expand and contract, leading to cracks.

  • Age: Over time, roofing materials can deteriorate, resulting in visible cracks.

  • Poor installation: If the roof was not installed correctly, it might develop cracks sooner than expected.

Small cracks can quickly become larger, leading to leaks and water damage. Inspect your roof regularly and look for:

  • Hairline cracks that may seem insignificant but can expand.

  • Deep cracks which indicate severe damage and require immediate attention.

Addressing cracks promptly with appropriate repair materials ensures the longevity of your flat roof.

A blue hose lies on the ground beside a fence, with water pooling around it, indicating recent use or leakage.

Water Accumulation

Water accumulation on a flat roof is a serious concern. Standing water can lead to:

  • Leaks: Water can seep through the roofing material, causing leaks inside the building.

  • Mould growth: Persistent moisture creates an ideal environment for mould, which can harm health.

  • Structural damage: Over time, water can weaken the roof's structure, leading to costly repairs.

To identify water accumulation, check for:

  • Puddles that don't drain within 48 hours after rainfall.

  • Stains or discolouration on the roof surface indicating water pooling.

Ensure proper drainage systems are in place to prevent water accumulation. Regularly clean gutters and downspouts to facilitate water flow off the roof.

A flat roof covered with a grey membrane, suitable for flat roof repair services in London.

Flat Roof Repair London

If you live in London and need flat roof repair services, it's essential to choose a reliable provider. Look for companies that offer:

  • Experience: A company with years of experience in flat roof repair will provide better service.

  • Customer reviews: Positive reviews indicate satisfied customers and quality work.

  • Warranty: A warranty on repairs ensures peace of mind and protection against future issues.

Some well-known flat roof repair services in London include:

Company

Services

Bell Asphalt Co.

Flat roof repair, maintenance and installation

Denco Liquid Waterproofing

Advanced Liquid Waterproofing Services

By choosing a reputable company, you ensure your flat roof is repaired efficiently and effectively, prolonging its lifespan and protecting your property.


 A person skillfully using a trowel to apply cement for repairing a self-levelling flat roof.

Tools Required

To repair a self-levelling flat roof, you need specific tools. They ensure a seamless, long-lasting finish. The right tools make the job easier. They also ensure the repair will last. Below, we list the tools and materials needed for a self-levelling flat roof repair.


Safety Gear

Safety gear is crucial when working on a flat roof to protect yourself from potential hazards. Always prioritise safety to prevent accidents and injuries.

Two men in safety gear working on a roof, using tools to complete their construction project.

Essential safety gear includes:

  • Hard Hat: Protects your head from falling debris.

  • Safety Glasses: Shields your eyes from dust and splashes.

  • Gloves: Keeps your hands safe from sharp objects and chemicals.

  • Non-Slip Boots: Provides traction on the roof's surface to prevent slips.

  • High-Visibility Vest: Ensures you are easily seen by others, especially in low light.

Before starting any repair, inspect your safety gear to ensure it is in good condition. Always wear your safety equipment throughout the repair process to minimise risks.

Repair Materials

For a successful self-levelling flat roof repair, you need specific materials designed for durability and performance. The right materials ensure a smooth and effective repair.

Key repair materials include:

  • Self-Levelling Compound: The primary material used to level the roof surface.

  • Primer: Prepares the roof surface for the self-levelling compound, ensuring better adhesion.

  • Reinforcing Fabric: Strengthens the repaired area, preventing future cracks and damage.

  • Sealant: Seals edges and seams to prevent water infiltration.

  • Mixing Tools: Ensures the self-levelling compound is mixed thoroughly for a smooth application.

Always choose high-quality materials to ensure the longevity of your repair. Follow the manufacturer's instructions for each product to achieve the best results.


Two men in yellow vests are engaged in road work, highlighting their role as flat roof specialists in London.

Flat Roof Specialists In London

Hiring flat roof specialists in London can be a wise decision for complex repairs. These professionals have the expertise and experience to handle various roofing issues.

Benefits of hiring flat roof specialists:

  • Expert Knowledge: Specialists understand the intricacies of flat roof systems and repair techniques.

  • High-Quality Materials: They have access to top-quality materials that may not be available to the general public.

  • Advanced Tools: Professionals use advanced tools that ensure precise and efficient repairs.

  • Guaranteed Workmanship: Many specialists offer warranties on their work, providing peace of mind.

  • Time-Saving: Hiring a specialist can save you time and effort, allowing you to focus on other tasks.

When choosing a flat roof specialist in London, check their credentials, read reviews, and ask for references. Ensure they have experience with self-levelling roof repairs to guarantee a high-quality job.


A man wearing blue gloves and a black shirt is seen painting a floor, focusing on surface preparation.

Preparing The Surface

Repairing a self-levelling flat roof is vital. It ensures your roof's durability. Preparing the surface is a crucial step in this process. A well-prepared surface is key. It lets the self-levelling compound stick. This provides a smooth, even finish that protects your roof from water and weather damage.

Cleaning Debris

Before you begin any repair work, cleaning debris from the roof is essential. Debris can include leaves, dirt, and other materials that may have accumulated over time. Follow these steps to ensure a clean surface:

  • Start by using a broom or a leaf blower to remove loose debris.

  • For stubborn dirt, use a pressure washer, but be careful not to damage the roof membrane.

  • Inspect the roof for any moss or algae growth, and use a suitable cleaner to remove them.

Here's a quick reference table for cleaning tools:

Tool

Use

Broom

Removing loose debris

Leaf blower

Clearing larger areas quickly

Pressure washer

Cleaning stubborn dirt

Cleaner

Removing moss and algae

Ensuring a debris-free surface is critical as it allows the self-levelling compound to bond effectively. Skipping this step can result in an uneven application, leading to potential issues down the line.

Drying Techniques

Once the debris is cleared, drying the surface is the next step. A dry surface ensures the self-levelling compound adheres properly, preventing future water damage. Here are some effective drying techniques:

  1. Natural drying: Allow the roof to air dry naturally if the weather is sunny and warm.

  2. Forced drying: Use industrial fans or blowers to speed up the drying process.

  3. Heat drying: In colder months, use heat guns or portable heaters to ensure the roof is completely dry.

Consider these key points while drying:

  • Ensure no water puddles remain on the surface.

  • Check for damp spots under any roof fixtures or overhangs.

  • Use moisture meters to confirm the surface is dry.

A well-dried surface is essential for preventing moisture from getting trapped under the self-levelling compound, which can cause blistering and peeling.

Flat Roofing Contractors In London​

In London, the right flat roofing contractor is vital. It affects the quality and durability of your roof repair. Choosing experienced professionals ensures that they complete the job with accuracy and effectiveness. Here’s what to consider:

Experience: Seek out contractors with a proven track record in flat roof repairs. A skilled team brings knowledge and precision to each project.

Reputation: Check reviews and testimonials from past clients to assess reliability and satisfaction.

Licensing and Insurance: Your contractor must be fully licensed and insured. This protects you and gives you peace of mind.

Guarantees: Choose a contractor who guarantees their work. This ensures long-lasting results.

At Bell Asphalt Co., we combine experience and reliability in every project. We also have high standards. Our skills in surface prep and application ensure lasting repairs. You can trust us to do a great job.


Mixing Self-levelling Compound

Self-levelling flat roof repair is vital. It keeps your roof in top condition. One of the critical steps in this process is mixing the self-levelling compound. You must prepare this mixture correctly to achieve the best results. A well-mixed compound will yield a smooth, durable surface. It will withstand the elements.

Correct Ratios

Using the correct ratios is crucial for a successful self-levelling compound mix. The right balance of water and compound ensures the mixture spreads evenly and cures properly.

Here are some key points to remember:

  • Follow the manufacturer's instructions for water-to-compound ratios.

  • Typically, the ratio is around 4 parts compound to 1 part water.

  • Use a measuring container to ensure accuracy.

  • Too much water can weaken the mixture, while too little can make it too thick to spread.

Maintaining the correct ratios ensures the mixture will flow and settle evenly on the roof surface, providing a strong and smooth finish.

Mixing Techniques

Proper mixing techniques are essential for achieving a consistent self-levelling compound. Follow these steps to ensure a well-mixed compound:

  1. Prepare your tools: Use a clean bucket and a heavy-duty mixer or drill with a mixing paddle attachment.

  2. Measure ingredients: Accurately measure the water and compound based on the correct ratios.

  3. Start mixing: Pour water into the bucket first. Add the compound gradually while continuously mixing.

  4. Mix thoroughly: Use the mixer on low speed to avoid air bubbles. Mix for 2-3 minutes until the compound is smooth and lump-free.

  5. Check consistency: The mixture should be free-flowing but not too runny. Adjust water or compound if needed.

Tips for perfect mixing:

  • Do not over mix, as it can introduce air bubbles, weakening the mixture.

  • Mix in small batches to ensure consistency and prevent the compound from setting too quickly.

  • Keep the mixing area clean to avoid contamination.

Following these mixing techniques will help you achieve a smooth and even self-levelling compound, ready for application on your flat roof.

Application Process

Repairing a flat roof can be a daunting task, but with the right approach, it becomes manageable. The application process for self-levelling compounds is key. It ensures a smooth, durable repair. This guide will walk you through the steps, making the process simple and efficient.

A bottle of Porta Mix floor cleaner displayed on a clean surface

Pouring The Compound

The first step in the application process is pouring the self-levelling compound. Here are the detailed steps you need to follow:

  • Prepare the Surface: Clean the roof surface thoroughly. Remove any debris, dirt, or loose material. This ensures the compound adheres properly.

  • Mix the Compound: Follow the manufacturer’s instructions for mixing. Use a clean bucket and a mixing paddle. Ensure the mixture is smooth and lump-free.

  • Start Pouring: Begin at the farthest corner from the exit. Gradually pour the compound onto the surface. Work in sections to maintain control.

Consistency is key. Ensure an even and continuous pour to avoid air bubbles. The compound should flow smoothly across the surface, filling any gaps or cracks.

Spreading Techniques

After pouring the compound, the next crucial step is spreading it evenly. Here’s how you can achieve a smooth and level finish:

  • Use a Spreader: Utilise a gauge rake or a long-handled squeegee. These tools help distribute the compound evenly.

  • Work Quickly: Self-levelling compounds set fast. Spread the compound immediately after pouring. This prevents it from hardening prematurely.

  • Check for Level: Use a spirit level to ensure the surface is flat. Adjust as needed while the compound is still wet.

For larger areas, consider dividing the roof into smaller sections. This helps maintain control and ensures even coverage. Remember to overlap each section slightly to avoid seams.


Finishing Touches

Self-levelling flat roof repair has key steps. They ensure a durable, leak-free surface. The last stages, called the "Finishing Touches," are vital. They ensure the repair lasts and works well. This phase includes sealing edges and conducting a thorough final inspection.

Sealing Edges

Sealing edges is a critical step in self-levelling flat roof repair. Proper sealing prevents water from seeping beneath the roofing material, which can cause damage over time. The edges are often the most vulnerable parts of the roof, and they require special attention.

Here are the steps to ensure effective edge sealing:

  • Clean the edges thoroughly to remove any debris or old sealant.

  • Apply a primer to the edges to ensure better adhesion of the sealant.

  • Use a high-quality polyurethane or silicone sealant specifically designed for roofing applications.

  • Apply the sealant evenly along the edges using a caulking gun.

  • Use a putty knife to smooth out the sealant and ensure it fills all gaps and cracks.

To make sure the edges are properly sealed, follow these tips:

Tip

Benefit

Choose the right sealant

Ensures durability and flexibility

Work in small sections

Allows for more precise application

Inspect the sealant

Identifies any missed spots

A white wall showing a small patch of dirt, indicating areas needing attention during the final inspection.

Final Inspection

Final inspection is the last but essential step in self-levelling flat roof repair. This ensures that every aspect of the repair is flawless and ready to withstand weather conditions.

Here's a checklist for a thorough final inspection:

  1. Check for uniformity in the self-levelling compound. Ensure there are no uneven areas.

  2. Inspect the edges to confirm that the sealant has been applied correctly.

  3. Look for bubbles or cracks in the surface that might indicate issues.

  4. Ensure all drainage points are clear and functional to prevent water pooling.

  5. Verify that all tools and materials have been removed from the roof.

During the inspection, pay attention to these key areas:

  • Seams and joints: These are potential weak points that need to be secure.

  • Flashing: Ensure it's properly installed and sealed.

  • Surface: It should be smooth and free of debris.

Document any findings during the inspection, and address any issues immediately to ensure the roof is in optimal condition.


Maintenance Tips

Maintaining a self-levelling flat roof is vital for ensuring its longevity and functionality. Proper upkeep prevents costly repairs and enhances the roof's performance. Install these maintenance tips to keep your flat roof in top condition.

Two men conducting regular inspections on a roof, using a power tool for maintenance and repairs.

Regular Inspections

Regular inspections are crucial for identifying potential problems early. Schedule inspections at least twice a year, preferably in the spring and fall. These checks help spot issues like cracks, blisters, or pooling water.

During inspections, focus on:

  • Surface Damage: Look for cracks, punctures, or blisters on the roof's surface.

  • Seams and Joints: Check for any signs of separation or damage in the seams and joints.

  • Drainage Systems: Ensure that gutters and drains are clear of debris and functioning properly.

  • Flashing: Inspect the flashing around chimneys, vents, and edges for any gaps or deterioration.

Routine Cleaning

Routine cleaning is essential for maintaining the integrity of your self-levelling flat roof. Dirt, debris, and organic matter can accumulate, leading to water retention and damage.

Follow these steps for effective cleaning:

  1. Clear Debris: Remove leaves, branches, and other debris from the roof surface and gutters.

  2. Wash Surface: Use a low-pressure hose to wash away dirt and grime. Avoid high-pressure washers as they can damage the roof material.

  3. Check for Algae: Look for algae or moss growth and use a mild cleaning solution to remove it.

  4. Inspect Drains: Ensure that all drains are clear and functioning correctly to prevent water pooling.

Consider these cleaning intervals:

Task

Frequency

Debris removal

Monthly

Surface washing

Quarterly

Algae check

Twice a year

Regular cleaning helps prevent damage and extends the life of your flat roof.


Bell Asphalt Co. Logo

Contact Us Today

A self-levelling flat roof repair from Bell Asphalt Co. helps keep your roof strong and safe for a long time. This type of repair is simple but very good at protecting roofs. Check your roof often. Fix any problems. This will avoid big, costly repairs later. Our team at Bell Asphalt Co. knows how to keep your roof in great shape. This repair also helps your whole building last longer! If you need help with your roof, reach out to us anytime!


Common Questions About Self Levelling Flat Roof Repair

What Is Self Levelling Roof Repair?

Self-levelling roof repair is a simple way to fix bumpy or damaged roofs. It ensures that rainwater flows off the roof without obstruction to prevent leaks. In this method, they pour a special liquid compound onto the roof. This liquid spreads out by itself, filling in low spots and making the surface flat and even.

The process starts by checking the roof for any cracks or bumps. Once someone fixes those, they apply the self-levelling liquid. Using the right liquid for your roof, like asphalt or concrete, is key. It will ensure lasting results. This method keeps the roof strong and safe for a long time.

How Long Levelling Roof Repair Does It Last?

A levelled roof repair's lifespan depends on the materials, the work, and the weather where you live. With good materials and careful work, a leveled roof can last 10 to 20 years. Regular check-ups are important too—small fixes help it last even longer.

Weather can wear down a roof over time. Heavy rain, snow, and strong sunlight can all affect it. If you live somewhere with extreme weather, you may need repairs more often. Quality work and regular care will keep your roof strong for many years.

Is It Suitable For All Flat Roofs?

Self levelling repair is suitable for most flat roofs. However, it's essential to check compatibility with your roof material.

Can I Do It Myself?

Yes, you can do it yourself with the right tools and materials. Follow manufacturer instructions for best results.

18 views1 comment

Recent Posts

See All

1 Comment

Rated 0 out of 5 stars.
No ratings yet

Add a rating

Self-levelling flat roof repair is an essential service for addressing issues like uneven surfaces or water pooling, which can lead to leaks and further damage. A skilled roofing contractor can expertly apply self-levelling compounds to restore proper drainage and smooth out imperfections. This repair method helps extend the life of a flat roof by improving its performance and preventing costly water damage. Working with a professional ensures the repair is done correctly and efficiently, providing long-lasting results.

Like
bottom of page