Roof Leaks

Common Causes Of Roof Leaks

Roof leaks are every homeowners worst nightmare. No one wants to fork out thousands to get fix their roof. It is what we like to call a ‘guilt purchase’. If the roof leaks are not discovered and repaired quickly, it can cause immense damage to the building structure. Here is a list of roofing aspects we think you should consider with roof leaks:

Dirt And Debris Build-Up

If you have a lot of overhanging trees by your rooftop or you see a lot of debris on your roof, call a roof repair specialist to come and clean and inspect your roof. It is important to keep your roof clean to permit adequate waterflow. Even if you do not notice any roof leaks, we suggest you have your roof inspected anyway.

Gutters And Downpipes

This goes hand in hand with item 1 above. Blocked gutters or down pipes will cause a water backlog. Thus, water will find its way under your roof tiles or metal sheets, causing internal leaks. Ensure your gutters are clean and are in good condition.

Roof Age

Roofs deteriorate overtime, that is inevitable. The older it gets, the less effective it becomes with keeping water out. South Africa is very prone to experiencing all 4 seasons in one day. This causes your roofs temperature to fluctuate often resulting in your roofing material to become brittle and crack or loose effectiveness. If your roof has not been inspected in more than 3 years, we strongly recommend you get your roof inspected ASAP. Roof leaks can occur for months before you see the symptoms in your interior space. But by that time, it is too late and the damage to your roofing structure has already been done.

Roof Ridges

Roof ridges are the highest point of the roof and covers the opening where the 2 roof planes meet. The roof ridges are normally joined with repair mortar which has a tendency to crack overtime. The tiny cracks result in roof leaks.

Roof Ridges


These little devils are the source of many roof leaks. Chimneys need to have specific flashings properly installed and the counter-flashing that goes into the brick mortar needs to be perfect. If not, you will have roof leaks guaranteed. Small hairline cracks often occur which causes major water ingress, especially in our heavy Johannesburg storms.

Valleys And Flashings

Valleys are long metal sheets that run up and down the intersection where two roofs meet. Roof flashings are metal sheets that are installed where objects or extra builds protrude from the roof. It prevents water from entering joints and causing roof leaks. If these vital aspects have holes or are not joined correctly, it will cause major roof leaks and damage.

Valleys and Flashings

Uneven or Unlevelled Surfaces

If you have a flat concrete roof that is not even or slopping slightly towards a downpipe, you will experience water ponding. Roofs are not designed to hold the weight of water so ponding will cause major roof damage if not corrected. Long periods of ponding can also create a build-up of silt. Silt is like tiny grains of sand and soil that start to break down the waterproofing on the flat roof. Thus, causing roof leaks.


This ‘Roof Leaks’ article has helped a lot of clients so we hope it will help you too. We are professionals in roof leak inspections and can assist you with any questions or queries you may have regarding your roof. There is a reason we have the reputation we do so don’t hesitate to call us today for a free roof inspection and quotation.

Damp Proofing Cost

How Much Does Damp Proofing Cost?

Damp proofing cost are based on a number of factors as damp proofing treatment can be very broad depending on what sort of damp it is.

Our Rising Damp Cost Factors Include:

  • Firstly, is it rising damp? If not, what sort of damp is it?
  • How many meters of damp need to be treated?
  • Are there any obstructions in the way of installing the damp treatment? (ie. windows, plugs, wall mounted items etc)
  • Is it a simple wall or are there permanent wall mounted objects that would need to be broken and removed and carted off site?
  • Is the damp accessible? We have had cases in the past where our team had to squeeze through a tiny gap under the bathroom basin cupboard in order to treat the rising damp on the wall.

With the above factors in mind, you can expect to pay the following for rising damp treatment:

  • Interior Rising Damp Less Than 10m – R730.00 per square meter.
  • Interior Rising Damp More Than 10m – R680.00 per square meter.
  • Exterior Rising Damp Less Than 10m – R600.00 per square meter.
  • Exterior Rising Damp More Than 10m – R520.00 per square meter.

What If It Is Not Rising Damp?

If the damp problems are not rising damp at all then a comprehensive investigation would need to be scheduled by our trained damp proofing team to determine what the cause the damp is. Damp can be caused by tiled roof leaks, flat roof leaks, leaking window sills, plumbing pipes, cracked exterior wall, leaking down pipes and more. For more information on damp, see our damp proofing page.

If you do have damp in your home and you have questions, please do not hesitate to contact our damp proofing team. We will happily assist you with any queries you might have. We are a 4th generation waterproofing and damp proofing business so we have seen it all!

Waterproofing Options

3 Common Waterproofing Systems For Your Project

Waterproofing systems are critical to have. A simple leakage in a building roof can often result into serious problems, not only causing damage to the building’s structure but can also be very expensive to fix.  Leaks can be mended with efficient waterproofing techniques done by a professional waterproofing company.

This ensures that water cannot penetrate through the roof of the building. The best and most cost-effective solution is prevention. Through durable sealing and applying of waterproof coatings, water intrusion can be prevented, eliminating water damage.

Consult with a roof waterproofing expert who will know the most effective waterproofing method to use for each application.

Sheet membranes and Liquid membranes are mostly used for implementing water protection for roofs. Let’s take a closer look at these three waterproofing systems.

Waterproofing Options:

Sheet Membrane Waterproofing (AKA Torch On Waterproofing)

Using high quality adhesive, sheet membranes may be cold applied or with the help of a torch. When done right, sheet membrane provides a durable and long-lasting waterproofing solution. Sheet membranes are good to apply to almost all horizontal areas that require waterproofing. They are usually high performance and non-hazardous.

Liquid Membrane Waterproofing

Liquid waterproofing membranes delivers an excellent waterproofing solution that is applicable to small or very detailed areas. It is ideal for wet areas, very easy to apply, resistant to UV rays and not harmful to the environment. A great advantage of using liquid membranes is that it creates a fully bonded, protective seal, this ensures that no water will enter beneath the membrane.

Epoxy Waterproofing

Epoxy is a type of resin adhesive membrane that dries hard, shiny, and smooth. Applying several coats of this can result in a water-proof or water-resistant surface. It is designed to be used as seamless waterproof membrane to protect concrete from water damage as well as resistant to bacteria and moisture due to its seamless nature. But epoxy waterproofing is rigid (not flexible) and may break when there are movements in the building elements due to thermal expansion and contractions.

What Is Important To Note

Roof waterproofing prevents damage to the roof and structure caused by water. Little attention is paid to the waterproofing as it ends up being hidden, when it fails it results in a very expensive repair.

In order to prolong the life span of a building structure and prevent damage, waterproofing methods must be properly applied by waterproofing specialists.


Credit: HPD Consult

Everything You Need To Know About Green Roofs

Simply put, green roofs are a system that is installed on an existing roof top covered by plants and other vegetation. Green roofs are becoming more and more common as society turns to being more environmentally mindful. Not to mention it is aesthetically pleasing. Although there are hundreds of benefits to having a green roof, the installation process is very involved. Even with a professional contractor. Whether the green roof is installed in a residential settlement or on a skyscraper in town, there are a few vital features to consider.

Green Roof Layers:

  • Waterproofing layer: Of course this is the most important process. You need an additional waterproof and root-resistant layer installed to keep the roof structure undamaged and safe. A green roofing system that ends up leaking into the interior of the building can be detrimental to the structure and the people inside.
  • Drainage & Filter layer: The excess water on the roof needs to escape somehow as standing water can cause a problem in the long term. Be sure that the roof outlets are always clear of dirt and debris. You can add pebbles at the entrance of the outlets to ensure no vegetation makes its way into the drainage system.
  • Soil Profile Layer: The perfect substrate for a green roof consists of low, lightweight nutrients. It should have a ratio of 30 percentage organic material and 70 percentage inorganic material. Soil that is too heavy, will contribute to the heavy load on the roof which you want to avoid as much as possible.


  • Vegetation Layer: Finally, the fun part. The type of plant you choose is dependent on whether you installed an extensive or intensive green roof. An extensive green roof plant choice(grasses, herbs, sedums) needs little to no maintenance with no irrigation system. An intensive green roof consists of vegetation(small trees and other deep rooting plant species) that needs professional maintenance and an irrigation system. You can tailor your choice to attract certain species of bird, bee or any other wildlife.

A Green Roof Note

A green roof naturally acts as an acoustic insulation, thermal insulation and fire retardation. Since the sun’s UV rays never get to reach your roof surface, the electricity used in your home decreases, saving you money!

We give the green roofing system two thumbs up! They have great benefits but if not installed correctly, this can be a very costly repair. Contact our team at Apex Waterproofing for any questions or queries. It pays to work with waterproofing and roofing professionals.

Benefits Of Roof Waterproofing

Is Your Leak Caused By Plumbing Or Waterproofing?

Firstly, you are not alone. We see this occurrence at least a few times a month, so it is a very common dilemma. Since both professions deal with water in different aspects, it can be difficult for clients to determine who to call first.

Ask The Following Questions:

  1. When does it leak (only when it rains, all the time, only when water is running through the taps, only when there is a lot of wind driven rain etc)?
  2. What is above the leak area (balcony, shower, roof)?
  3. Is there water supply or drainage pipes in the vicinity? It is common to find damaged drainage pipes/down pipes that are built into the wall.
  4. Are there aircon units in the vicinity? It is also common to find aircon condensation on ceilings, especially in a commercial setting.

Depending on the answers to the above-mentioned questions, the following steps will then need to be taken by a waterproofing professional:

  • Flood testing the area from the lowest point to the highest point (balcony, roof, bathtub etc).
  • If no leak is reproduced, at this stage we would recommend a plumber who would carry out one of 2 things; a pipe pressure test OR chopping to expose any underlying issues.

In our experience, this is the most thorough and cost-effective way to ascertain where your water ingress problem is situated. If it is not the waterproofing and is in fact plumbing, a waterproofing professional might still need to be hired in certain scenarios as the plumber would chop up any waterproofing that may have already been installed to get to the problem pipe (ie. Shower leaks, balcony leaks etc).

Our team not only offer free on-site inspections but we also compile detailed reports of what the cause is and what our tailor-made solution is to repair it. Contact us today and let us be of service to you.

Leaking Roofs Might Be More Disastrous Than You Think [Solution]

As a homeowner, you have a lot of responsibilities when it comes to maintaining your house. Anything can go wrong at any time. One of the most common problems are leaking roofs.

Juggling buckets and emptying them every few minutes can be tiresome and frustrating. And what happens when you’re not home when heavy rain sets in? That’s right – water damage! Which translates to spending all your hard-earned money on new furniture, floors and roof repairs.

It’s very seldom that roof leaks are just that. In most cases, it’s a sign of something much bigger. Blocked gutters, loose or broken tiles, damaged flashings, unclipped metal roof sheets, damaged roof ridges or general poor installation of materials are all reasons why your roof is leaking

Dangers of a Leaking Roof

Ignoring the problem won’t make it go away. In fact, here are 4 ways a leaking roof can affect you:

Mould Growth

Mould can be found in any damp area and is extremely harmful to your health. If you have respiratory problems, it will worsen the symptoms. If you don’t, mould will ensure that you do. Moisture also attracts a large variety of bugs such as cockroaches, mold mites, camel crickets and millipedes.

Fire Hazard

If your electric cables are exposed in your ceiling, water damage can cause a short in the wires which could cause a full-blown fire.

Slip and Fall Hazard

Pooled water caused by a leak anywhere in your home can cause you to slip and hurt yourself. This is especially dangerous when children and the elderly are present.

Further Structural Damage

Of course if the roof leak is not attended to within a reasonable time, this WILL lead to further structural damage (rotten timber, plastic underlay damage, rust to metal roof frames, major ceiling board damage and wall damp to name a few).

My Roof Is Leaking What Should I Do

The solution to any roof leak is to get in touch with professional roof repair contractors as soon as possible. We offer reliable and affordable roof repairs in Sandton and surrounding areas. Our experienced roofing technicians will do a full roof inspection to find the cause of the leak so you can have peace of mind that the problem will be sorted out completely.

To prevent roof leaks in future, we strongly recommend you call us for a thorough roof inspection every 3 years to avoid any costly damage. Even if you do not detect a leak, it is important you keep up to date with the status of your roof. For more information or a free quote, get in touch today!

Keep Your Home Warm with Roof Insulation

Roof insulation has many benefits but the most important one is that it keeps your home’s temperature comfortable and consistent. It will keep your home cool in summer warm during winter without using appliances.

Your home’s temperature varies from room to room. Thus, your heating or cooling system has to work harder to regulate temperature. This will increase your electricity bill significantly during peak summer and winter periods.

By regulating the temperature inside your home, you’ll decrease the strain on your appliances. Thus, saving money on electricity bills. You will also put less pressure on South Africa’s already weak electricity infrastructure by using less electricity. So win-win for everyone.

How Does Insulation Work?

Insulation works by blocking cold air from entering and warm air from escaping through your roof. It’s typical for South African homes to only have a thin ceiling. Which doesn’t do much when it comes to stopping unwanted air from entering or leaving your home. Insulation acts as a barrier between your roof and ceiling.

We Offer Professional Roof Insulation for Any Type of Roof

Whether your home has a tiled roof, metal roof or flat concrete roof, we have the right insulation solutions for you. We are true Isotherm experts and have many satisfied clients to show for it. Our helpful and friendly team is always ready to answer any questions you might have so you can make an informed decision.

If you’re looking for an eco-friendly insulation solution for your home or business, we can offer the best product on the market at an affordable rate. For more information or if you would like to book a consultation, speak to the team at Apex Waterproofing today!

Roof Coatings – 5 Great Benefits

Roof coatings are becoming more and more necessary due to their quick application and standard guarantee awards. A roof directly exposed to the elements experiences continual cyclic thermal movement as the roof material heats up and cools down during the day. Not only does this movement occur between night and day cycles, but also as a result of passing clouds, wind, rain and condensation. Here is a list of 5 great advantages to applying a heat barrier roof coating to your roof:

5 Benefits Of Heat Barrier Roof Coatings

Extended Roof Life

Roof coatings create a resilient barrier between the elements and your roof (be it metal, tiled, concrete, shingles). The right roof coating increases your roof’s waterproof quality guarding your roof from harmful sun rays, prevents UV damage, and reflects heat away from the roof’s surface. This increases the longevity of your roof while lowering roof maintenance expenses.

Reduced Cooling Costs

Lower roof’s surface temperature and decrease your home’s interior temperature by an average of 8 – 12 degrees Celsius! This happens in two distinct ways:

  • A reflective roof coating when applied to roofs help reflect more sunlight from the surface reducing the amount of heat absorbed by the structure, which then translates into reduced energy cost.
  • Quality roof coatings will also reflect damaging ultraviolet and infrared sunlight away from your building (this is called thermal emittance), allowing for cooler roof and building temperatures.

Fade Resistance

Help your roof maintain its colour over time improving the overall look of your roof as it ages. Since the roof coatings are reflective, the colour of the roof is maintained for a longer duration, which makes your roof look more appealing, as per the images below:

Lower Maintenance

Lower thermal expansion of the roof means less movement of fasteners, joins, overlaps and structural elements. The result is extended maintenance intervals and longer life of the roof components.

Can Be Applied On Any Roof Type:
Roof coatings are formulated to adhere to a wide range of roofing types. Metal roofs, asphalt roofs, composite roofs, galvanized metal roofs, wooden roofs, tiled roofs, concrete roofs and others.

For a free inspection from the best Roof Coating Company in Johannesburg, get in touch with us today! Our staff are ready to assist you with all your roof coating needs.

DPC For Rising Damp

Chemical injected DPC For Rising Damp

DPC (damp-proof course) in-between the brick work of a building during construction helps to prevent rising damp. However, older buildings do not have this system in place. Therefore, a chemical DPC can be injected to create a continuous chemical barrier against rising damp. Other than the costly and risky process of re-installing a physical DPC. Which would require the breaking down of the damp effected walls and re-building them to include DPC in-between the brick work. Chemical injections are the only method of DPC re-reinstatement that has stood the test of time.

DPC Inject Process

Once the plaster of the damp effected area is hacked off to expose bare brick, a series of holes are drilled into the brick work. The number and pattern of the holes is determined by the construction of the wall and its thickness. The plaster is then replaced with a waterproof salt retardant plaster before starting the process of acrylic and painting.

This system is normally best suited for brick or block buildings, as these types of structures are generally more stable. However, it may not be effective if any gaps are left in the wall construction. Or if gaps form over time with material deterioration.

Damp in some older buildings may be caused by a leak or a defect in the wall construction (such as a cracking, rather than by rising damp). Therefore it is important that any defects are identified and corrected prior to accepting the cost and disruption of chemical DPC injection.

If you are facing any damp related issues and you’re not sure how to choose the right treatment procedure, get in touch with the team at Apex Waterproofing and Damp Proofing Johannesburg for a free quote today!

Damp Problems

How to Manage Damp Problems in Old Office Buildings

Damp is a common problem and nearly always visible in old houses and buildings.

Damp In Office Buildings

When damp is present in your commercial building, you might be exposing staff or customers to the side effects of damp. This includes black mould which is harmful to your health. Unpleasant smells as well as ruined furniture. So, if you suspect that your commercial property has damp issues, what can you do about it?

Since there are various types of damp, each one of them has a unique treatment plan. Damp types include Rising damp, lateral (or penetrating) damp and condensation. Nearly all damp issues – around 75% – are caused by condensation. While condensation seems to be harmless, it can lead to serious health problems and property damage.

The first step to take is diagnosing damp problems. If you suspect your property has damp, the best thing to do is to get in touch with a qualified damp specialist. They will carry out a thorough survey to find the origin of your damp problem as well as determine a solution to eradicate it.

Who Is Responsible for Damp Treatment in Offices?

Depending on the terms of your lease agreement, the landlord or owner will be responsible. Especially if the damp is caused by structural problems. But whoever is responsible, damp is something that needs to be dealt with urgently. Related issues like wet and dry rot can be detrimental to the property’s structure and black mould can make your office building unsuitable for inhabitance if left untreated.

Your employees deserve to work in a safe and secure environment which is why damp treatment in offices is crucial if you find you have a damp problem. For more information or if you need a consultation and free quote, get in touch with the team at Apex Waterproofing today.