Commercial Waterproofing Fully Adhered S
Commercial Waterproofing Fully Adhered S

Commercial Roofing Waterproofing Specialists


At Waterbrothers we are proud to be associated with a company, that more than 60 years ago, revolutionised the commercial roofing industry with the Carlisle EPDM membrane.

With 1.5 Billion square meters installed worldwide Carlisle has cemented themselves as the world leader in waterproofing systems.

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Time Tested

Carlisle EPDM is time-tested in real-world conditions. Black EPDM roofing systems have been used for more than 60 years. Testing of 30-year old EPDM shows tear, tensile strength and flexibility meet or exceed ASTM standards

Superior weather resistance

Carlisle EPDM has advanced resistance to UV exposure, heat and mold.

ASTM G155 for Xenon Arc + 41,580 kj/m2 for black EPDM

ASTM D573 for heat aging = 68 weeks at 240°F

ASTM G21 for fungi = zero ( no growth )


Carlisle EPDM’s nominal 1.14mm of weathering protection is significantly greater than most plastic based sheets. A 20 year material warranty is available on the 1.14mm and 30 year warranty on the 1.524mm*

Superior Hail Resistance

Numerous studies and real-world experience confirm that Carlisle EPDM has a 465% elongation ( ASTM D412 ) and weathering resistance results in superior hail damage resistance and UL 2218 Class 4 rating.

Energy Efficiency

The solar benefits of Black EPDM help to reduce heating costs in cooler climates while the cross-linked nature of Carlisle EPDM can handle the heat in hot climates.

Rooftop Safety

EPDM’s dark color surface helps to melt frost, dew and ice that can create slippery conditions on reflective waterproofing. The black Carlisle EPDM reduces a roofs water load and dries more quickly that a reflective roof.


Carlisle EPDM is the most dimensionally stable membrane, remaining flexible in extremely cold conditions. Per ASTM D5279-08 EPDM is more flexible at 0 degrees F than TPO at 100 degrees F.


The solar thermal benefits of black Carlisle EPDM also help to reduce potential condensation issues. Undetected condensation in a roofing assembly can negatively affect the performance of paper insulation facers, weakening the bond between insulation and adhesive and can have a detrimental effect on the insulations R-value, resulting in reduced thermal efficiency.

Quality Seams

Carlisle’s labor saving seaming technology and pressure sensitive flashings improve the quality and consistency of seams. Electrical or gas seaming equipment consumes natural resources and is dependent on the applicator using correct speed, temperature, and pressure to avoid false or cold welds or seams.

Fewer Seams

At Waterbrothers we stock the 3m, 6m, and 9m wide x 30m long panels, this reduces the number of seams when compared to other products on the market, which also reduces pooling on the roof deck.

Benefits of EPDM



EPDM is a synthetic rubber with a molecular cross-linked structure, ethylene propylene diene monomer rubber (EPDM) is far superior, more durable and more flexible than conventional roofing systems. EPDM is completely weather and UV-resistant.

With an extreme elasticity of more than 500%, it is the most flexible single-ply membrane for waterproofing flat roofs, buildings and facades and is credited with a service life of more than 50 years. Being extremely durable and flexible EPDM is perfect for a wide range of waterproofing applications.

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EPDM roofing membrane has been the architects, builders and roofing contractors choice for the low slope commercial roofing industry for more than over 40 years.


The greatest test of any construction material is how well it performs under field conditions. Forty years of tested and documented experience in field applications has shown EPDM to have the longest average service life of over 50 years.

Baseline Roofing System




EPDM is proven to cost less over other types of flat roofing materials is its one of the most inexpensive residential roofing materials.


EPDM is very lightweight, so can be used on decks, balconies and flat roofs without the need of reinforcement. EPDM is durable and perfect for warm and sunny climates.

Carlisle EPDM has been field-tested for 60 + years and due to its unique molecular cross-linked structure, it is by far a more durable and flexible option than conventional roofing waterproofing systems. Carlisle EPDM is a synthetic rubber that is completely weather resistant and UV stable and with an elasticity of more than 500%, it is the ideal single-ply membrane for all waterproofing and water containment solutions.

Fully Adhered System


EPDM membrane is adhered
directly to the substrate using a specialised bonding adhesive.

Inverted System


EPDM membrane is adhered
directly to the substrate using a specialised bonding adhesive.

Ballasted System


EPDM membrane is loose laid on
a substrate with a geotextile and ballast layer to keep membrane in place.

20 years
5 Years
Appearance is pleasing and modern and not affected by age
Appearance deteriorates with age and looks outdated
Hard wearing, resistant to weathering, flexible and requires no maintenance
Susceptible to weathering and UV rays. No flexibility, tears, splits and cracks
Easy to install, safe and less time consuming
Difficult to install, unsafe to torch on application
50% less when longevity is linked
Higher cost, will have to be periodically replaced
Life Expectancy
80 Years
10 - 12 Years
Non toxic, Eco Friendly
Some non toxic
Maintenance Plan
Service every 2 – 3 years @ Approx R250/m²
Service every 2 – 3 years @ Approx R250/m²
UV Stability
UV Resistant
Not stable requires aluminium silver paint
Not stable – requires top coat of paint
Elongation of Break
Up to 500%
Up to 300%
Minimum Thickness
Up to 8mm
Cold applied
Heat Fusion with Gas blow torch
Cold Applied with spray
Non toxic, Eco Friendly
Some non toxic

Commercial waterproofing Ballasted System

Commercial waterproofing Ballasted System

Commercial waterproofing Ballasted System

Commercial Waterproofing Fully Adhered System

Commercial Waterproofing Fully Adhered System

Commercial Waterproofing Fully Adhered System

Commercial Waterproofing Fully Adhered System

Commercial Waterproofing Fully Adhered System

Commercial Waterproofing Fully Adhered System