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

Writer's pictureBell Asphalt Co.

Asphalt Flat Roof Repair: Expert Tips for Lasting Results

Updated: 3 days ago


Shadow of a fence on the ground, highlighting the texture of an asphalt flat roof during repair work.

Repairing an asphalt flat roof involves fixing leaks and damage. Then, apply patching materials to create a watertight seal. Asphalt flat roofs are common in commercial and residential buildings. They are durable and cheap.

Over time, exposure to weather conditions and natural wear can cause leaks or cracks. Regular maintenance and timely repairs are crucial. They extend the roof's life and prevent worse damage. Identifying problem areas early helps avoid costly replacements. Using high-quality patching materials and following proper repair techniques ensures a long-lasting fix.

You may need help for severe damage or if you're unsure about repairs. A well-maintained asphalt flat roof provides excellent protection and longevity.


Common Asphalt Roof Issues

Asphalt flat roofs are popular for their durability and cost-effectiveness. Yet, like any roofing material, they face common issues over time. Knowing these issues can help you better maintain your roof and extend its lifespan.



Cracks And Blisters

Cracks and blisters are among the most common issues on asphalt flat roofs. Cracks often occur due to the roof's exposure to extreme weather conditions. Blisters form when air or moisture gets trapped in the roofing layers. These issues can lead to significant damage if not addressed without delay.

Here are some typical causes of cracks and blisters:

  • Thermal expansion and contraction

  • Poor installation practices

  • Ageing of the roofing material

  • Water infiltration due to poor drainage

To prevent cracks and blisters, regular inspections are crucial. Look for signs of wear and tear, and address small issues before they become major problems. You can also apply a protective coating to your roof to help it withstand the elements better.

Here is a quick comparison of causes and prevention methods:

Cause

Prevention

Thermal expansion

Apply flexible coatings

Poor installation

Hire experienced professionals

Ageing

Regular maintenance

Water infiltration

Ensure proper drainage

Wet concrete ground near a wall with some small trash and black railing.

Ponding Water

Ponding water is another frequent issue with asphalt flat roofs. It happens when water collects in low areas and does not drain properly. Prolonged ponding can damage the roof's surface and lead to leaks.

Common causes of ponding water include:

  • Poor roof design

  • Clogged drainage systems

  • Settling of the building structure

Ponding water can cause several problems, such as:

  • Accelerated wear of the roofing material

  • Growth of algae and mould

  • Structural damage to the roof

To manage ponding water, ensure that your roof is designed with adequate slope for drainage. Regularly clean gutters and downspouts to prevent clogs. In some cases, installing additional drains or using a tapered insulation system can help redirect water flow.

By addressing these common issues, you can help prolong the life of your asphalt flat roof and avoid costly repairs.


Broken tiles with a blue-handled tool on the ground.

Tools And Materials Needed

To repair an asphalt flat roof, use the right tools and materials. They are key to a long-lasting fix. Understanding what you need can save time and money. This guide will list the tools and materials for asphalt flat roof repair.

Essential Tools

Having the right tools is crucial for any repair job. Below is a list of essential tools you will need to repair an asphalt flat roof:

  • Roofing Hammer: Used to remove damaged shingles and install new ones.

  • Utility Knife: Essential for cutting roofing materials accurately.

  • Caulking Gun: Necessary for applying roof sealant.

  • Roofing Nails: Special nails designed for roofing applications.

  • Chalk Line: Helps in making straight lines for precise cuts.

  • Roofing Shovel: Ideal for removing old roofing material.

  • Measuring Tape: Ensures you get accurate measurements for new materials.

  • Safety Gear: Includes gloves, safety glasses, and a harness for protection.


A man fills a hole on an asphalt flat roof using a bucket

Repair Materials

The materials you use are equally important. Here's a list of repair materials needed for an asphalt flat roof:

  1. Asphalt: The main material for the roof surface.

  2. Roof Sealant: Used to seal joints and edges to prevent leaks.

  3. Roofing Felt: Provides an additional layer of protection under the shingles.

  4. Flashing: Metal pieces that direct water away from critical areas.

  5. Roofing Cement: Used to patch holes and fill gaps.

  6. Primer: Prepares the surface for better adhesion of new materials.

  7. Underlayment: Adds an extra layer of waterproofing.

  8. Roof Coating: Protects the roof from weather damage.

Here's a table summarising the materials and their uses:

Material

Use

Asphalt

Main roofing material

Sealing joints and edges

Roofing Felt

Additional protection layer

Flashing

Directing water away

Roofing Cement

Patching holes

Primer

Surface preparation

Underlayment

Waterproofing layer

Roof Coating

Protecting from weather

Flat Roof Repair In London

Finding reliable flat roofing companies in London can be challenging. Quality service is crucial for a durable repair. Here are some tips for finding the best flat roofing companies in London:

  • Research Online: Look for companies with positive reviews and high ratings.

  • Ask for Recommendations: Friends and family can provide valuable insights.

  • Check Certifications: Ensure the company is certified and insured.

  • Get Multiple Quotes: Compare prices to get the best deal.

  • Visit Completed Projects: Seeing previous work can help you judge quality.

  • Discuss Warranties: Make sure they offer a warranty on their work.

Here's what to consider before hiring a company:

  1. Experience: How long have they been in business?

  2. Specialisation: Do they specialize in flat roofs?

  3. Customer Service: Are they responsive and helpful?

  4. Payment Plans: Do they offer flexible payment options?

  5. Local Knowledge: Do they understand local building codes?

By following these tips, you can find the best flat roofing companies in London for your repair needs.

Safety Precautions

Repairing an asphalt flat roof is vital. It keeps your home or business intact. The workers must observe proper safety precautions during the repair process. This ensures the safety of the workers and the longevity of the roof. Below are some crucial safety measures to keep in mind.

Personal Protective Equipment

Wearing the right Personal Protective Equipment (PPE) is critical for a safe roof repair job. Proper PPE helps prevent injuries and ensures the safety of everyone involved. Here are some essential PPE items:

  • Hard Hats: Protects against head injuries from falling objects.

  • Safety Glasses: Shields eyes from debris and chemicals.

  • Work Gloves: Prevents cuts and abrasions while handling materials.

  • Non-Slip Boots: Ensures stable footing on the roof surface.

  • High-Visibility Vests: Makes workers easily visible, especially in low-light conditions.

Remember to inspect your PPE regularly to ensure it remains in good condition. Damaged or worn-out equipment should be replaced immediately. Proper training on the use of PPE is also essential to maximise its effectiveness.

Fall Safety Measures

Falls are one of the most common hazards in roofing work. Implementing the right fall safety measures can prevent serious injuries or fatalities. Here are some vital steps to take:

  • Use Guardrails: Install guardrails around the perimeter of the roof to prevent falls.

  • Safety Harnesses: Workers should wear safety harnesses attached to anchor points.

  • Safety Nets: Deploy safety nets to catch workers if they fall.

  • Warning Lines: Use warning lines to mark off areas where workers should not go.

  • Training: Ensure all workers receive proper fall prevention training.

Regularly inspect all fall protection equipment to ensure it is in good working condition. Conduct a thorough assessment of the roof to identify potential hazards and take steps to mitigate them.

Flat Roof Repair Cost In London

The cost of flat roof repair in London can vary depending on several factors. Understanding these factors can help you budget effectively for your repair project. Key cost factors include:

Factor

Impact on Cost

Roof Size:

Larger roofs require more materials and labor.

Extent of Damage:

Severe damage may require more extensive repairs.

Material Costs:

High-quality materials tend to be more expensive.

Labour Rates:

Labour costs vary depending on the contractor's expertise and rates.

Access to Roof:

Easy access can reduce labor time and costs.

Typical costs for flat roof repair in London range from £500 to £3000. Get multiple quotes from reputable contractors to ensure you get a fair price. Always check reviews and credentials before hiring a contractor.

Flat Roofing Installation In London

Proper installation of flat roofing in London is crucial for its durability and performance. A well-installed roof can last for many years with minimal maintenance. Here are some key steps for a successful installation:

  1. Site Preparation: Clear the roof of any debris and old materials.

  2. Insulation Installation: Install proper insulation to enhance energy efficiency.

  3. Underlayment Application: Apply a waterproof underlayment to protect against moisture.

  4. Asphalt Layering: Apply the asphalt layers evenly for a smooth finish.

  5. Sealing and Inspection: Seal all seams and inspect the roof for any weak spots.

Choose a reputable contractor who specialises in flat roofing to ensure the best results. Regular maintenance can help extend the life of your flat roof, saving you money in the long run.

A roof covered with a tarp, featuring various tools scattered across its surface.

Preparing For Repairs

Asphalt flat roof repair ensures the longevity and durability of your roof. Before starting the repair, it's crucial to prepare with thoroughness. This preparation includes assessing the damage, cleaning the surface, and sometimes even consulting with expert flat roof contractors in London. Proper preparation can save time and money, ensuring a successful repair.


Assessing Damage

Before any repair work begins, assessing the damage is essential. This step helps identify the problem areas and determine the extent of the damage. Follow these steps for a thorough assessment:

  • Inspect the roof for visible cracks, blisters, and punctures.

  • Check for water stains on the ceiling inside the building.

  • Look for areas where the asphalt is peeling or bubbling.

Document your findings by taking photos and notes. This documentation helps in planning the repair process.

Identifying the severity of the damage helps in choosing the right repair materials and methods. Don't rush this step; a thorough assessment is key to effective repairs.


Cleaning The Surface

After assessing the damage, the next crucial step is cleaning the surface. A clean surface ensures that repair materials adhere properly. Follow these steps for a clean and prepared roof:

  1. Remove debris such as leaves, branches, and dirt using a broom or blower.

  2. Scrub the roof surface with a brush and soapy water to remove grime and algae.

  3. Rinse the roof thoroughly with clean water and allow it to dry completely.

Proper cleaning prevents new materials from lifting and cracking.



Flat Roof Contractors in London

Hiring flat roof contractors in London can make the repair process smoother and more efficient. Professional contractors bring expertise and specialized tools. Here's how to find the right contractor:

  • Research online reviews and ratings to gauge customer satisfaction.

  • Ask for recommendations from friends or family who have had similar repairs.

  • Verify the contractor's license and insurance to ensure credibility.

Professional contractors can assess the damage accurately and recommend the best repair methods. They also have access to high-quality materials, ensuring a durable repair. Consider these benefits of hiring a contractor:

Benefit

Description

Expertise

Years of experience in flat roof repairs.

Efficiency

Quick and professional service.

Warranty

Guarantee on repair work.

Choosing the right contractor can save time and prevent further issues. Always communicate your expectations clearly and get a detailed quote before starting the project.


Repairing Minor Cracks

Asphalt flat roofs are popular for their durability and cost-effectiveness. Over time, minor cracks may appear due to weather and wear. Repairing these cracks without delay prevents further damage and extends the roof's life.



Using Sealant

Sealant is a quick and easy solution for minor cracks. It's essential to choose a sealant designed for asphalt roofs. Start by cleaning the crack thoroughly. Remove any debris, dirt, or loose asphalt. A clean surface ensures the sealant adheres properly.

Follow these steps for using sealant:

  • Step 1: Clear the crack of any debris.

  • Step 2: Use a wire brush to remove loose asphalt.

  • Step 3: Apply the sealant with a caulking gun.

  • Step 4: Smooth the sealant with a putty knife.

  • Step 5: Allow the sealant to dry as per manufacturer's instructions.

Here is a table summarising the drying times for different sealants:

Sealant Type

Drying Time

Acrylic

4-8 hours

Polyurethane

12-24 hours

Silicone

24-48 hours

Applying Patches

For larger cracks, patches are more effective. First, clean the area around the crack. Remove all loose material and debris. A clean surface ensures the patch sticks well.

Follow these steps for applying patches:

  • Step 1: Clean the area around the crack thoroughly.

  • Step 2: Cut a patch that extends at least 2 inches beyond the crack.

  • Step 3: Apply roofing cement to the area.

  • Step 4: Place the patch over the crack and press down firmly.

  • Step 5: Cover the patch with another layer of roofing cement.


Dealing With Blisters

Blisters on an asphalt flat roof can cause serious damage if not addressed without delay. These blisters form when moisture gets trapped under the roof. This causes bubbles to appear on the surface. Dealing with blisters early can save you from costly repairs and extend the life of your roof. This guide will show you how to puncture and seal blisters.

Puncturing Blisters

Puncturing blisters on your asphalt flat roof is a delicate process. Follow these steps to ensure you do it correctly:

  • Locate the blisters: Walk around your roof and identify all the blisters. Mark them with chalk so you don't miss any.

  • Prepare your tools: You will need a utility knife, a trowel, and a pair of gloves.

  • Make a small cut: Use the utility knife to make a small X-shaped cut in the center of each blister. This allows the trapped moisture to escape.

  • Press out the moisture: Gently press down on the blister with the trowel to squeeze out any water or air.

  • Dry the area: Leave the blisters open for a few hours to let the area dry completely.

Sealing And Patching

Sealing and patching the blisters ensures they don't cause further damage. Follow these steps:

  1. Clean the area: Remove any debris or loose material around the blister with a brush.

  2. Apply roofing cement: Use a trowel to spread roofing cement over the cut blister. Make sure to cover the entire area.

  3. Place a patch: Cut a piece of roofing fabric to fit over the blister. Press it into the roofing cement.

  4. Add more cement: Apply another layer of roofing cement over the patch. Smooth it out with the trowel.

  5. Let it cure: Allow the patch to cure for at least 24 hours before exposing it to the elements.

Properly sealing and patching blisters prevents water from entering your roof and causing leaks. This process should be done carefully to ensure the longevity of your asphalt flat roof.

A water puddle beside a fence, illustrating the issue of ponding water in the area.

Addressing Ponding Water

Many buildings have asphalt flat roofs. They are durable and cost-effective. But, one common issue that owners often face is ponding water. Ponding water refers to water that stays on the roof for more than 48 hours after a rainfall. This can lead to leaks, structural damage, and a shortened roof lifespan. Addressing ponding water is crucial to maintaining the integrity of your flat roof.




A sewer drain featuring a hose beside a bright red fire hydrant on a city street.

Improving Drainage

Improving drainage is the first step in tackling ponding water on your asphalt flat roof. A well-drained roof prevents water accumulation, reducing the risk of leaks and damage. Here are some effective strategies:

  • Install Additional Drains: Adding more drains helps water escape faster. Place them in low spots where water tends to collect.

  • Clean Existing Drains: Regularly clean drains to remove debris. Blocked drains cause water buildup.

  • Use Sump Pumps: Sump pumps can help move water off the roof. These are especially useful for large flat roofs.

Regular maintenance is key. Inspect your roof's drainage system after heavy rain to ensure everything is functioning properly. Consider professional help for installing or repairing drainage systems. Proper drainage significantly reduces the risk of ponding water, protecting your roof from potential damage.


A man works on a sloped roof, carefully balancing a bucket of water as he performs maintenance tasks.

Adding Slope

Another effective method to address ponding water is by adding a slope to your flat roof. A slight incline ensures water flows towards the drains, preventing accumulation. Here are some ways to add slope:

  • Tapered Insulation: Tapered insulation involves installing insulation boards that gradually increase in thickness. This creates a slope that directs water towards the drains.

  • Roof Crickets: Roof crickets are small structures that divert water away from critical areas. They are often installed around HVAC units and skylights.

  • Re-pitching: Re-pitching involves adjusting the roof's structure to create a natural slope. This method is more involved and may require professional assistance.

Adding slope not only helps with water drainage but also enhances the overall durability of your roof. It's a worthwhile investment that can save you money on repairs in the long run.


Maintenance Tips

Asphalt flat roofs are popular for their durability and cost-effectiveness. But, like any roofing material, they need regular maintenance to ensure longevity. Proper maintenance can prevent expensive repairs and extend the lifespan of your roof. Here are some essential maintenance tips for your asphalt flat roof.


A man on a ladder repairs the roof of a house under a clear blue sky.

Regular Inspections

Regular inspections are crucial for spotting potential issues before they become major problems. Inspect your roof at least twice a year, preferably in spring and fall. During inspections, look for the following:

  • Cracks and Blisters: Check for cracks, blisters, and other signs of wear and tear.

  • Ponding Water: Look for areas where water accumulates. Standing water can weaken the roof material.

  • Debris: Remove leaves, branches, and other debris that can trap moisture.

  • Seams and Flashings: Inspect seams and flashings for gaps or damage.

Document any issues you find and address them promptly. If unsure, hire a professional to inspect your roof.


A green plant thriving on a roof, highlighting the importance of cleaning gutters for proper drainage

Cleaning Gutters

Clean gutters are vital for the health of your asphalt flat roof. Clogged gutters can cause water to back up, leading to leaks and water damage. Follow these steps to keep your gutters clean:

  1. Remove Debris: Use gloves to remove leaves, twigs, and other debris from gutters.

  2. Flush Gutters: Use a hose to flush out remaining dirt and check for proper water flow.

  3. Check Downspouts: Ensure downspouts are clear and directing water away from the building.

  4. Install Gutter Guards: Consider installing gutter guards to reduce debris buildup.

Regularly cleaning your gutters can prevent water damage and extend the life of your roof. Make it a routine to check and clean your gutters every few months.


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Contact Us Today

Repairing an asphalt flat roof can extend its lifespan and prevent costly damage. Regular inspections and timely fixes are crucial. By addressing issues early, you can maintain a durable and leak-free roof. Remember, professional help from Bell Asphalt Co. ensures quality repairs. Keep your roof in top shape for long-lasting protection. Contact us today. Let's discuss your roof maintenance needs. We want to keep your property secure and protected!


Common Questions About Asphalt Flat Roof Repair

How Do You Repair An Asphalt Flat Roof?

Repairing an asphalt flat roof can be simple with the right steps! First, check for cracks, blisters, or spots where water might sit. Clean the area to remove dirt and debris so repairs stick well.

For small cracks, spread asphalt roofing cement with a putty knife to seal it. For bigger blisters or tears, you might need to cut away the damaged part and patch it with new material. Seal the edges with cement to prevent leaks. Remember, you can always ask a professional for help if needed!

What Materials Are Needed For Asphalt Roof Repair?

To repair an asphalt roof, you’ll need a few basic materials. Start with asphalt roofing cement to seal cracks and damaged spots—it helps keep water out. If you need to replace broken shingles, have some extras ready.

Gather these tools: a utility knife to cut shingles, a putty knife to spread cement, and a pry bar to remove old shingles. A caulking gun can help you apply cement in an orderly manner. And don’t forget safety gear like gloves and goggles! With these items, you’re all set to fix your roof!

How Long Does Asphalt Roof Repair Last?

An asphalt roof repair's lifespan depends on a few things. These are the damage size, the materials used, and the contractor's skill. A good repair can last 5 to 15 years if done well and on time.

Remember, repairs are usually a temporary fix. If your roof is older or has a lot of damage, it might be better to replace it instead of doing many small repairs. Regular checks can help keep your roof strong and save you money. Always ask a professional for advice!

Can You Repair An Asphalt Flat Roof In Winter?

Yes, you can repair an asphalt flat roof in winter, but it’s a bit trickier! Cold weather makes asphalt harder to work with, so choose materials that are made for winter.

Before starting, make sure the roof is clear of snow and ice to keep it safe and help materials stick. If the weather is too bad, like heavy snow or freezing rain, it’s best to wait for a clearer day. Always think about safety first, and ask a professional if you need help!

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