DIY Waterproofing for Tiled Roofs

If you’re a Homeowner with a tiled roof, you may have experienced issues with water leaks during heavy rain. These leaks can be annoying, and if left untreated, can cause damage to your home and your pocketbook. Fortunately, with the right knowledge and tools, you can waterproof your tiled roof yourself. In this article, we will delve into various techniques and methods for DIY waterproofing of tiled roofs.

Understanding the Importance of Roof Waterproofing

Before we dive into the DIY waterproofing techniques for your tiled roof, let’s first understand the importance of this process. Roof waterproofing is crucial for several reasons, including:

  • Preventing water damage: A leaky roof can cause water damage to your home’s walls, ceilings, insulation, and electrical wiring.
  • Avoiding structural damage: Excessive water can penetrate the roofing material and damage the structure of the roof, causing further harm to your home’s foundation.
  • Maintaining your home’s value: If left unaddressed, water damage can be visible to potential buyers, lowering the value of your property.

DIY Techniques: Waterproofing a Tiled Roof

There are several DIY techniques to waterproof your tiled roof. These methods can be utilized to minimize water damage, preventing expensive repair bills and roof replacement. Here are some widely used methods.

Cleaning the Roof

Before you begin any DIY waterproofing technique, ensure that the roof is clean. Start by removing any leaves, dirt, and debris. You can use a garden hose, a pressure Washer, or a leaf blower to clean the surface of the roof. Remove any loose or broken tiles or shingles and check for mildew or mold.

Applying Coating

One of the most effective ways of waterproofing your tiled roof is to apply a coating. Waterproof coating is used on all types of flat and low-slope roofing materials. Here’s how to do it:

Step 1: Prepare the Surface

Before applying the waterproof coating, you must prepare the roof surface. Remove any dirt or debris. Fix any loose or cracked tiles, apply a primer, and wait for it to dry.

Step 2: Apply the Coating

Apply the first coat of the waterproofing coating using a roller or a brush. Let it dry for three to four hours. Then, apply a second coat. You can repeat this process until you get a fully waterproof surface. Make sure to follow the manufacturer’s instructions.

Sealing Cracked Tiles

Sealing cracked tiles is another cost-effective technique for waterproofing your tiled roof. Here’s how:

Step 1: Locate the Leaks

Find out the exact location of the leaks. You can do this by checking for water stains on the roof or by walking on the roof to identify and mark the cracked tiles.

Step 2: Clean and Repair Cracks

Using a high-pressure hose or a stiff brush, clean the tiles of any dirt and debris. Then, using roof cement, seal the cracks in the tiles. Make sure to let the cement dry thoroughly before applying another coat.

Applying a Waterproof Membrane

A waterproof membrane is an effective way of keeping rainwater out of the home. This technique utilizes a thin, rubber-like membrane that is placed between the tiles and the roofing material. Here’s how to do it:

Step 1: Clean and Dry the Roof Surface

Clean the roof thoroughly, removing any dirt and debris. Use a blower or a towel to dry the roof completely.

Step 2: Apply the Membrane

Cut the membrane to the appropriate size, allowing for overhang of two inches on each side. Place the membrane on the roof, starting from one end and working towards the other. Use a roller to press down on the membrane, removing any air bubbles. Then, install the tiles back into their corresponding locations.


Q: Can I use an acrylic coating as a waterproofing solution?

A: Yes, acrylic-based coating is an effective waterproofing solution. However, it may not work effectively in areas with high water damage.

Q: How often should I check for leaks in a waterproofed tiled roof?

A: It’s recommended to check for leaks every six months or after heavy rain.


Waterproofing your tiled roof can be a DIY project that can save you money in the long run. However, depending on the extent of the damage, it might be better to call a professional to handle the task. The DIY methods we’ve talked about are just some of the ways to waterproof a tiled roof and prevent water damage to your property. Remember to consult with a professional and follow manufacturer guidelines when using waterproofing materials to get the best results.

Cape Town Waterproofing

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