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Waterproofing: Uni-Flexx waterproofing system provides a 100% water tight application also acting as a heat barrier which keeps the underlying residence/rooms cooler in summer. Uni-Flexx waterproofing system contains a UV barrier which prolongs the life span of the product. Waterproofing of all types of surfaces and substrates is our specialty and one of our core business features. We have been in the waterproofing business for over 25 years.


images© Universal Roofing 1990 - 2017

All WATERPROOFING work is guaranteed and we have a long list of satisfied customers. We waterproof house roofs including flat roofs, concrete slab roofs, pitched tiled roofs, balconies, skylights, parapet walls, sidewalls, chimneys and chimney flashings, leaking chimneys, plumbing vent pipes, dome skylights, plumbing inspection covers, tiled roofs, roof ridging, IBR roofs, corrugated roofs and box gutters.


images© Universal Roofing 1990 - 2017


It is strongly suggested that waterproofing is done professionally before painting your home, office or factory. We do waterproofing on any substrate. We have done 1000's of roof waterproofing contracts in Guateng, including waterproofing Sandton, Morningside, Fourways, North Riding, Randburg, Roodepoort, Lonehill, Kyalami, Parkview, Parktown, Pretoria, Centurion, Hartbeespoort, Johannesburg North, Carlsworld, Midrand, Edenvale, Germiston, Alberton, Craigavon, Northcliff, Rangeview, Rand Park Ridge, Sandringham, Pretoria East, Kempton Park and all areas in Gauteng, South Africa.


images© Universal Roofing 1990 - 2017

We also waterproof factory roofs including IBR steel roofs, Corrugated steel roofs, Box Gutters, Cliplock Roofs and polycarbonate roofs. We have many years of experience and we are Senior Members of the Dampproofing and Waterproofing Association of South Africa and also the Gauteng Master Builders Association (Established in 1903).

Universal Roofing's range of cold applied liquid Polymer membranes offer a seamless roof waterproofing solution suitable for use in both commercial and domestic developments in newly built and refurbished environments.

Uni-Flexx Polymer Waterproofing System    Eco-Flexx Polymer Waterproofing System

Universal Roofing

Universal Roofing Johannesburg

5 Industrial Road, Kya Sands, Johannesburg

Business hours: Monday to Friday, 7a.m. to 17:30 p.m.

Tel: 011 708 7474

Tel: 011 708 4024

Neotel: 011 025 4124

Email: receptionjhb@universalroofing.co.za


Universal Roofing Pretoria

Stand 689, Hennopspark Business Park X70, Centurion

Business hours: Monday to Friday, 7a.m. to 17:30 p.m.

Tel:    012 653 7227

Tel:    012 653 7228

Neotel: 012 751 4081

Email: receptionpta@universalroofing.co.za



Universal Roofing is a proud and good standing member of the Dampproofing and Waterproofing Association of South Africa and Senior Members of the Gauteng Master Builders Association.

t's&c's Please click here to view our standard terms and conditions



Over the past two decades, the construction industry has had technological advances in waterproofing materials, including integral waterproofing systems as well as more advanced membrane materials.

Integral systems work within the matrix of a concrete structure, giving the concrete itself a waterproof quality. There are two main types of integral waterproofing systems: the hydrophilic and the hydrophobic systems. A hydrophilic system typically uses a crystallization technology that replaces the water in the concrete with insoluble crystals. Various brands available in the market claim similar properties, but not all can react with a wide range of cement hydration by-products, and thus require caution. Hydrophobic systems use fatty acids to block pores within the concrete, preventing water passage. Crack's in expansion joints and concrete surface usually allow water to bypass these two systems. It is therefore reccomended that flexible waterproofing is applied to the surface to block water before it comes into contact with the concrete. Uni-Flexx has excellent adhesion, flexibility and durability qualities.

New membrane materials seek to overcome shortcomings in older methods like PVC and HDPE. Generally, new technology in waterproof membranes relies on polymer/Polymer based materials that are extremely adhesive to create a seamless barrier around the outside of a structure.


images© Universal Roofing 1990 - 2017  

WATERPROOFING: In building construction, a structure needs waterproofing since concrete itself will not be watertight on its own (but note concrete is easily waterproofed with additives). The conventional system of waterproofing involves 'membranes'. This relies on the application of one or more layers of membrane (available in various materials: e.g., bitumen, silicate, PVC, EPDM etc.) that act as a barrier between the water and the building structure, preventing the passage of water. However, the membrane system relies on exacting application, presenting difficulties. Problems with application or adherence to the substrate can lead to leakage.


Box gutters which are rusted are also our speciality and these occur mainly on flat roofs and factory roofs. We are highly proficient in this aspect and have sealed many types of roofs for every type of industry imaginable:

Some of our customers include:

LEO HAESE BMW, Midrand Airconditioners, SAAF, Burger King, Trident Steel, Standard Bank, KFC, Investec, FORD, Tiger Wheel and Tyre, Various churches from all religious and social groups as well as many of the high flyers of Corporate and Entertainment South Africa.

Waterproofing a roof successfully is what we do and we stand by our GUARANTEES. Contact us for free quotes for any type of waterproofing requirement.

Uni-Flexx  contains an Antimicrobial agent to prevent the growth and development of fungacide and algae on flat roofs. 

Popular Mechanics© 2011 Breakthrough awards salutes 10 products that represent the highest standard in innovation and execution. Universal Roofing utilises TiO2 (Titanium Dioxide) in our Uni-Flexx waterproofing system, which reacts with and neutralizes NOx (nitrogen oxide) particles in smog. The by-product is a harmless precipitate that accumulates on the roof and washes away in the rain. That is pollution removal at its best. No Machinery, moving parts or other energy input other than sunlight. Its just a clever, air-cleansing chemical reaction. The solution was awarded 7th place to a similar roofing company in the USA.

There are many advantages for using our Uni-Flexx waterproofing system:

Uni-Flexx is not an acrylic based system, which means that it is not water based and therefore not water soluble.

Uni-Flexx has an extremely good U.V. resistance.

There are no fumes given off during installation and no gas is used for the adhesion.

There is no noise pollution during application.

Uni-Flexx cools steel corrugated and IBR roofs to the touch (summer mid-day test)

Uni-Flexx can be applied onto many substrates such as: tiled roofs, steel roofs, concrete roofs, wooden roofs, everite roofs, concrete slabs, sealing of skylights and box gutters.

Uni-Flexx has an expansion allowance to minimize the risk of cracking in extreme conditions.


In construction, a building or structure is waterproofed with the use of membranes to protect contents underneath or within as well as protecting structural integrity. The waterproofing of construction specifications includes roofing material as well as waterproofing materials. Waterproofing is used in reference to building structures (basements, decks, flat roofs, wet areas, etc.)

We specialize in the following types of waterproofing:

Tiled Roof Waterproofing
Waterproofing Flat Roofs
Waterproofing Balconies
IBR Roof Waterproofing
Thermoflex bitumen waterproofing
Polymer Waterproofing
Seamless Gutters and Box Gutter Waterproofing


Bituminous roofing products are perfect for the waterproofing of roofs on buildings as they move with the structure and are not too rigid, and do not absorb water. Bitumen is a hydrocarbon and is created naturally from crude oil. It is a useful carbon store and does not generate greenhouse gases. The membranes are therefore a sustainable way of storing carbon on the Earth's surface.

Advantages of using bitumen based waterproofing products:

As well as protecting buildings, bituminous roofing products can be in harmony with their environmental surroundings as different mineral finishes can be applied to the top surfaces.

The products have an extremely long life span

The fumes given off during installation are not harmful to human health and there is low noise pollution during application.

Bituminous membranes protect insulation and can reflect harmful sun rays.

Bitumen is not water soluble, non-biodegradable and does not release harmful toxins.




images© Universal Roofing 1990 - 2017


Leaking Roofs

Damaged Roofs

Sagging Roofs

Emergency Roof Repairs



Seamless Chromadek Gutters

Fascia Boards

Rotten Timber Replacement

Barge Boards

Torch on Flat Concrete Slab Roofs

Energy saving roof Insulation


images© Universal Roofing 1990 - 2017

We waterproof all types of roof's including leaking roofs, damaged roofs, sagging roofs and ceilings, flashings (around skylights, parapet and sidewalls, chimneys, ducts and vents). We also repair and replace rotten and damaged timber and restore roof trusses, brandering and ceilings to their original condition. Flat concrete roof's are no problem for our highly experienced team. Although we have been in business for over 19 years, our techniques remain at the forefront of waterproofing technology and our long guarantees stand testimony to this.


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Please feel free to comment on our products and services and any information contained on our website. Please send comments to: web@universalroofing.co.za


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