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Torch On VS Spray On Waterproofing

Torch On VS Spray On Waterproofing

During these rainy days, it crucial to waterproof.Read on to find out more on how to go about picking your best option in the multiple available options.

During these rainy days, it crucial to waterproof. As simple as that might sound, technical terms like “torch-on”, “bitumen”, and “spray-on” can get us all confused, making us dread an essential part of household maintenance. So what do we go for when so many options are presented to us? Even though torch-on waterproofing solutions might have its benefits, spray-on has time and time again proved to be superior, in many respects.

1. What is the difference between torch-on and spray-on waterproofing?

Bitumen torch-on waterproofing is a blend of bitumen and polymers, which are applied to a polyester or fibre-glass reinforcement membrane. It is an exclusive and specific waterproofing solution that works especially well on flat concrete roofs, foundation and retaining walls, flashings, parapet walls, expansion joints, corrugated and IBR roof laps and roofing screws, as well as gutters, flower boxes and water retaining structures. Torch-on is known for being a stronger, sturdier membrane and is generated to keep surfaces safe from damp and water. As it is damp waterproofing action, it averts the danger of logging water through its water-resistant surface.

Spray-on waterproofing, on the other hand, is a procedure by which a liquid waterproofing agent is applied to a surface. As presented in the name, this method of waterproofing is sprayed on, usually by a knowledgeable and experienced expert, by using a spray gun. The waterproofing agent exists the gun and is applied as a liquid form, but dries into a pliable, blocked membrane that water just cannot enter through.

2. Why use Spray-On Solutions?

This waterproofing solution is not just economically friendly, and non-toxic, but it also can be applied to any surface and bond with it very well. This includes concrete, masonry, stone, fibre cement, fibreglass, steel, tiles, etc. What this “bondability” means is that the spray-on waterproofing won’t be coming off.

As spray-on is so easy to apply, it can be used to large spaces, without a hassle and in a brief period. This would mean that projects can be completed on time, without a lot of manpower. It also means that labour is cheaper and that clients have their homes and building waterproofed in no time. The best products to use for spray-on applications are Silicone, Polyureas and Polyurethanes and mixtures of these. Out of these options, Silicone usually tends to be the most cost-effective, but also the least durable. When choosing to use silicone, it would be best to use it in areas that don’t require a lot or any traffic. Otherwise, if a stronger blend is required, it is best to go for the more durable, and a bit more expensive, Polyurea and Polyurethane. It also entails all finer details to be adequately sealed. All that is needed is to spray the required area with the coating, and the spray-on applicator will ensure that no space goes unturned.

Spray-on waterproofing has many advantages, the most salient being that it is seamless. It has and requires no joints which means that there are less weak areas for water to enter. Moreover, when your roof is coated with a UV top coat, it will protect the membrane against the sun for many years.

Other, more traditional waterproofing methods, like torch-on, can still be beneficial, but spray on solutions have proven to be more effective – especially in the long run.

3. Compared to Torch-On


Apples to Apples Comparison

SpecsTorch-on with 10 years GuaranteeSpray on by Bitumproof SA 
 Environment  Toxic None toxic, Eco Friendly
Application Heat Fusion with Gas blow torch Cold applied with Spray/Paint or Roller brushes
Minimum Required thickness 4mm 2mm
Elongation at break 25% 200% - 500%
UV stability Not stable – requires aluminium silver paint UV Resistant
Maintenance Plan Service every 18 - 24 months @ ±R120/m2 None
Price per m2 R145 – R220 R295 – R370
Year 2 +R120/m2 Free
Year 4 +R120/m2 Free
Year 5 +R120/m2 Free
Year 8 +R120/m2 Free
Total Cost/m2 R465 – R540 R295 – R370

It is abundantly clear that spray-on waterproofing solutions have proven to be the most effective waterproofing method used in the industry in recent years and has become increasingly popular due to its ease of use, durability and eco-friendliness. It is, however, important to note that every project differs and that it is best to get guidance from professionals. Visit our website, or call the professionals at Bitumproof today for advice on your waterproofing needs.

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Bitumproof SA provided fantastic service throughout! The crew were efficient, hard working and very approachable. I would highly recommend them for other waterproofing jobs!. Thanks guys!!


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Great experience with Bitumproof Waterproofing. We had water damage in our basement from some foundation cracks and the company ran as a first class business all the way through. Jose came out to give us a quote that was easily scheduled and he gave a great explanation of what they would do. They have a discount so make sure to ask about that. We had a lot of different jobs going on at the same time and we ended up getting thinking they didn't take the discount off, but Jose called back immediately after we called the office to make sure everything was in good order, and turns out the mistake was on our end. Highly recommended.

Highly recommended Waterproofing Johannesburg

Was very very pleased today they called and came as they said they would! The guy they sent today worked really hard and was a nice guy. I appreciate the good business especially calling me back right away thank you so much! For the last 70 years Pazkar has developed and manufactured sophisticated sealing and insulation materials for the construction and infrastructure industries – offering dozens of types sealants membranes, compounds and coatings. Pazkar allows professionals to provide outstanding sealing properties and protect buildings from infrastructure from the forces of nature. Pazkars research and development is the heart of the company's operation, where creativity and originality meet the most advanced technology' in order to develop reliable professional and creative insulation solutions for customer's waterproofing needs. Customer needs may differ. From industrial waterproofing, commerical waterproofing, or residential waterproofing, Pazkar's products fit all these needs.

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During the lockdown, we will take care of all your emergency waterproofing needs. Bitumproof essential services will make sure that you do not get affected by rain during this period.
For Emergency/ urgent assistance call: 0763333336
or 0785000000