Resealing a roof involves applying a protective coating or sealant to the surface of your roof. This coating acts as an additional layer of defence against various elements such as harsh weather conditions, UV rays, and moisture. By resealing your roof, you can extend its lifespan, prevent damage, and maintain its structural integrity.

Signs That Your Roof Needs Resealing

Determining the right time to reseal your roof is crucial. Regular inspections can help you identify signs of damage or wear that indicate the need for resealing. Here are some common signs that your roof may require resealing:

  • Tile Condition: If you have a terracotta or concrete tile roof, look out for broken or missing tiles. Damaged tiles can compromise the integrity of your roof and make it susceptible to leaks and other issues.
  • Moss, Lichen, and Dirt: The presence of moss, lichen, or excessive dirt on your roof can indicate the need for resealing. These elements can trap moisture and cause damage over time.
  • Leaks and Holes: If you notice any leaks or holes in your roof, it’s a clear indication that resealing is necessary. Addressing these issues promptly can prevent further damage and costly repairs.
  • Broken Ridge Caps: Inspect the ridge caps of your roof for any signs of damage. Broken or deteriorating ridge caps can compromise the integrity of your roof and lead to leaks.
  • Damaged Pointing: Pointing refers to the mortar or cement used to seal the gaps between tiles or bricks. If you notice damaged or deteriorating pointing, it’s important to reseal your roof to prevent moisture penetration.
  • Metal Surface Conditions: For metal roofs, check for signs of dirt, corrosion, and damage to screws and other fixings. These issues can weaken the roof’s protective layer and necessitate resealing.

Regular inspections can help you catch these signs early and take appropriate action to prevent further damage.

The Benefits of Resealing Your Roof

Resealing your roof offers several benefits that contribute to its longevity and performance. Here are some of the key advantages of resealing:


Resealing your roof creates a waterproof barrier that prevents water from seeping into your home. This is particularly important for flat roofs, where water can collect and lead to structural damage.

UV Protection

Roof sealants provide protection against harmful UV rays. Over time, exposure to sunlight can cause your roof to deteriorate. Resealing with a UV-resistant sealant can help prolong the lifespan of your roof.

Increased Fire Resistance

Certain roof sealants have fire-resistant properties, providing an additional layer of protection for your home. This can be particularly beneficial in areas prone to wildfires or where fire safety is a concern.

Mould Prevention

Resealing your roof helps prevent the growth of mould and algae. Moisture can accumulate on roofs, creating an ideal environment for mould and algae to thrive. By applying a sealant, you can inhibit their growth and maintain a healthier environment.

Reduced Cooling Costs

A properly sealed roof can improve energy efficiency by reducing heat transfer. This can result in lower cooling costs during hot summers, as the sealant helps to insulate your home and minimise heat absorption.

Easy Application

Resealing your roof is a relatively straightforward process, especially when performed by professionals. With the right tools and expertise, roof sealants can be applied efficiently, saving you time and effort.

Roof Resealing: DIY or Professional Help?

When it comes to replacing your roof, it’s important to consider whether to tackle the job yourself or hire professional help. While some homeowners may have the skills and experience to handle the task, it’s worth noting that roof work can be dangerous, especially for those without proper training or safety equipment.

DIY Resealing

If you choose to reseal your roof yourself, it’s essential to prioritise safety. Ensure you have the necessary protective gear, such as gloves and safety glasses, and use a sturdy ladder. Additionally, familiarise yourself with the proper techniques and materials required for the job. DIY resealing can be a cost-effective option, but it’s crucial to assess your capabilities and the complexity of the task before proceeding.

Professional Help

Hiring a professional roofer for resealing offers several advantages. Experienced roofers have the knowledge and expertise to perform the job efficiently and effectively. They also have access to high-quality materials and equipment, ensuring a long-lasting and durable seal. Moreover, professionals are well-versed in safety protocols, minimising the risks associated with roof work. While professional services come at a cost, the peace of mind and quality results they provide make it a worthwhile investment.

How Often Should You Reseal Your Roof?

The frequency of resealing your roof depends on various factors, including the type of roof and its condition. As a general guideline, it’s recommended to reseal your roof every 10 to 15 years. However, certain factors may necessitate more frequent resealing. These factors include the climate in your area, the presence of severe weather conditions, and the overall wear and tear on your roof. Regular inspections can help determine when resealing is required, allowing you to address any issues promptly.

The Resealing Process: Step-by-Step Guide

Resealing your roof involves several steps to ensure a thorough and effective application. Here is a step-by-step guide to resealing your roof:

Step 1: Inspection and Preparation

Start by inspecting your roof for any signs of damage, leaks, or areas that require attention. Clear away any debris or dirt from the surface of the roof. If necessary, perform minor repairs, such as replacing broken tiles or addressing leaks.

Step 2: Cleaning

Thoroughly clean the roof surface to remove any dirt, moss, or algae. Use an appropriate cleaning solution recommended for your roof material, and follow the manufacturer’s instructions. Ensure that the roof is completely dry before proceeding to the next step.

Step 3: Application of Sealant

Select a high-quality roof sealant that is suitable for your roof material and climate conditions. Apply the sealant according to the manufacturer’s instructions, using the recommended tools and techniques. Ensure even coverage and pay attention to areas prone to leaks or damage.

Step 4: Drying and Inspection

Allow the sealant to dry completely before conducting a thorough inspection. Check for any missed spots or areas that require touch-ups. Address any issues promptly to ensure a seamless and effective seal.

Step 5: Regular Maintenance

Once your roof is sealed, it’s important to maintain its condition through regular inspections and maintenance. Monitor for any signs of damage or wear, and address them promptly to prevent further issues. Regularly clean your roof to remove dirt and debris that can compromise the sealant’s effectiveness.

By following these steps and maintaining a proactive approach to roof maintenance, you can ensure the longevity and performance of your roof.


Resealing your roof is a crucial aspect of roof maintenance that can significantly impact its lifespan and performance. By understanding the signs that indicate the need for resealing, the benefits it provides, and the proper process for application, you can ensure the longevity and durability of your roof. 

Whether you choose to tackle the task yourself or hire professional help, regular inspections and maintenance will help you stay on top of your roof’s condition and prevent costly issues down the line. Invest in the well-being of your roof, and it will protect you and your home for years to come.