Complete Piece Of Mind – 20 Year Maintenance Free Guarantee

Coommercial Roofing Waterproofing Specialists

At Waterbrothers we are proud to be associated with a company, that more than 50 years ago, revolutionized the commercial roofing industry with the Carlisle EPDM membrane.

With 1.4 Billion square meters installed worldwide Carlisle has cemented themselves as the world leader in waterproofing systems.

carlisle-epdm-waterproofing-south-africa and southern Africa

Top 10 reasons to choose Carlisle EPDM

Time Tested

Carlisle EPDM is time-tested in real-world conditions. Black EPDM roofing systems have been used for more than 50 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.


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.



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.

EPDM Waterproofing Systems


Carlisle EPDM has been field-tested for 50 + 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 or loose laid on the substrate with an insulation board, geotextile and ballast layer.

Ballasted System

EPDM membrane is loose laid onn
a substrate with a geotextile and ballast layerto keep membrane in place.



Life Expectancy 80 Years 10 – 12 Years
Price 50% less when longevity is linked Higher cost, will have to be
periodically replaced
Installation Easy to install, safe and less time consuming Difficult to install, unsafe to torch on
Durability Hard wearing, resistant to weathering,
flexible and requires no maintenance
Susceptible to weathering and UV rays.
No flexibility, tears, splits and cracks
Aesthetics Appearance is pleasing and modern
and not affected by age
Appearance deteriorates with age
and looks outdated
Guarentee 20 years 5 years



Environment Non toxic, Eco Friendly Toxic Some non toxic
Application Cold applied Heat Fusion with Gas blow torch Cold Applied with spray
Minimum Thickness 1.14mm 4mm Up to 8mm
Elongation of Break Up to 500% 25% Up to 300%
UV Stability UV Resistant Not stable requires aluminium silver paint Not stable – requires top coat of paint
Maintenance Plan None Service every 2 – 3 years @ Approx R250/m2 Service every 2 – 3 years @ Approx R250/m2