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Published on 12 May 2021 15:39

Facades Interface Waterproofing – EPDM Still an Alternative?

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Key Learning outcomes
  • The advantages of using EPDM
  • EPDM in the Facade Industry
  • CE marking and Tests
  • Legal and Technical Requirements
  • New Solutions for the future
EPDM (Ethylene Propylene Diene Monomer) is a very durable synthetic rubber membrane and is widely used worldwide in a number of different applications on façade walls. It has very stable properties such as vapour, air and watertightness along with elongation of >400% allowing it to accommodate building differential movements.
In addition to that, EPDM is an environmentally friendly material. When installed correctly it has a life expectancy of over 50 years. This durability reduces the construction needs and consequently the disposal quantities to the environment. EPDM sheets can be recycled after used for a number of different things such as rubber mats used in children’s playgrounds and car tires. Not only is it the healthiest option for the planet, but it’s also the best financial choice. Long lifespan, durability and efficiency means that replacement costs are far less than the alternatives available.
In addition to the advantages listed above, it is important to note that, when exposed to the influence of temperature, UV radiation, and other weather conditions, EPDM does not release toxic substances to the environment.

1.0 EPDM in Facades

Nowadays facade projects are becoming more and more demanding and are constantly pushing the boundaries. Currently, the façade design is challenged to deliver a unique aesthetic façade (curved, twisted, transparent, etc.) and energy-efficient to fit into an inflexible budget/schedule. In most cases, this is a great challenge. Unique aesthetics turn sealing interfaces/construction joints an even harder task. Understanding that seals are crucial at interfaces between elements such as, glazing/wall sheathing board, wall sheathing board/concrete slab (or similar), parapet/roofing connection, GF connections, Curtain wall typology and many other examples is of the most importance. Such joints are particularly vulnerable to water and air leakage along with differential movements and it is vital that a robust, durable and efficient seal is applied.
This solution ensures water, vapour and airtightness to all facade element connections protecting the building and maximizing energy efficiency.

It is reliable to say that applying EPDM in facades brings the following benefits:

• Robustness: Water, Air and Vapour tight solution with elongation > 400%
• Durability – It has a high life-expectancy even with UV total exposure
• Predictability - It allows for bespoke shapes and dimensions allowing to transfer tasks from site to the Factory where there’s a controlled environment (better weather conditions, quality workmanship, improved work conditions);
• Universal – It is a solution used worldwide in different and extreme weather conditions;
• Efficiency - Integrated self-adhesive bands and/or fast-connect clip-in gasket possibilities which improves the quality and speed of application while narrowing the possibilities of human errors;

In facade projects, this membrane is used on the following applications:
• Connections on ventilated facades typology;
• Connections on curtain walls typology;
• Connections on modular and off-site construction;
• Sustainable Construction Projects.







EPDM Membrane applied between window and concrete wall
EPDM Membrane applied between window and concrete wall
 
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About

R. José Oliveira Mendes
nº44 4760-912
Vila Nova Famalicão
The information contained in the CPD article web pages is not intended and accordingly shall not be relied upon either as a substitute for professional advice or judgement or to provide legal or other advice with respect to any particular circumstance. RIBA Enterprises accepts no responsibility for loss occasioned to any person acting or refraining from action as a result of the information contained.
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