Q&A

• Use phase of buildings has the lowest environmental impact.
• Bituminous waterproofing membranes has a life expectancy of 35 years (see EWA & BDA reports).
• Each application of a new bituminous waterproofing membrane on an existing one will extend the life expectancy of the waterproofing system for 35 years. This a clear advantage of bituminous waterproofing membranes in comparison with other waterproofing membranes.
• IKO enertherm PIR insulation maintains its characteristics in time. The IKO enertherm insulation boards can stay in the system or new panels can be installed on top of the existing waterproofing system to improve the insulation value.
• As a summary, 35 years will be the minimum required lifetime to take the waterproofing membranes back from the roofs but this period can easily be extended thanks to the renovation facilities of the bituminous waterproofing membranes.

What is the procedure?

• The fixing supplier makes a pull-out test to define the pull-out resistance of the concrete structure
• IKO makes a wind load calculation to define the needed amount of fixation/m²
• Fixations need to be applied on insulation and waterproofing level in accordance with the placement pattern to offer the needed wind stability for the system

This system has different advantages:

• Possible application during not ideal weather circumstances
• Full control of wind resistance, rather than with glued systems
• Demountable at the end of the lifetime

For renovation projects:

• Opportunity to ensure that the current roof system obtains the necessary wind stability. Both the old and the new roof, will consequently be wind stable

• A mechanically fixed system in concrete costs more or less the same as a glued system. The working time is slightly higher, but the savings in glue and the possibility of being less dependent on weather conditions during installation offers clear advantages for mechanically fixed systems.
• On wood and steeldeck structure, mechanically fixed systems are more cost effective than glued systems.

• Yes this is possible, the existing bituminous waterproofing can be used as vapor barriers in the new system.
• Every component on top of this vapor barrier (approved IKO atelia system) will be completely circular.
• Take back certificate only valid for new waterproofing layer(s)

• As a producer, we have minimal impact on what happens on the job site
• We are also constantly working on making our packaging materials more sustainable (protecting foils, tapes, pallets, etc.)

• A flat roof waterproofing system needs to be designed by an architect office
• IKO makes specification text available for architects via website or IKO Design Center
• IKO partners can be contacted to make offer for the project
• The “by the building owner” partner who has the job introduces a request for warranty to IKO
• IKO takes care of the supplier follow up of the project
• After installation, the roofing contractor finalizes the request for warranty and receives the warranty document (take back certificate included) from IKO

• Bituminous waterproofing membranes stay compatible for connection with new bituminous waterproofing membranes what makes the possible repairs possible without any technical issues
• With an overlayment life expectancy of the bituminous waterproofing membrane can be extended for another 35 years
• An IKO atelia bituminous waterproofing system can be easily demounted and separated to optimize the recycling process of the bituminous waterproofing membranes
• IKO atelia and IKO carrara bituminous waterproofing membranes are already made of a high percentage of secondary raw materials