The consequences of poor installation practices, and how these relate to the catastrophic failure of External Wall Insulation Systems Paul Valentine Technical Excellence Director
Introduction A whistle stop tour of factors impacting on EWIS failure risk and how they relate to potential failure modes
Solid wall systems These are EWIS that do not form a cavity against the supporting substrate
Rail systems These have rails that form a cavity against the substrate which support the EWIS
Characteristics of the substrate supporting structure
Characteristics of the insulation Some properties of insulation that affect performance and how key factors may typically map to common forms
Characteristics of the render system Important characteristics of the render system that affect performance
Applied Actions – The design life environment Actions to be considered as applied through the design life of the installation
Installation environment – temporary actions Actions to be considered during the construction phase of the project
Failure mechanisms – Structural Bond Failure & Fixing Pull Out
Failure mechanisms – Structural Pull Through & Thermal Failure
Failure mechanisms – Fire
Elements of installation So far we have considered in outline the system types, the characteristics to be considered and the failure mechanisms that can occur. We now set the context of installation.
Consequences of poor installation – One
Consequences of poor installation – Two
Consequences of poor installation – Three
Final Words Invest in quality systems and practices
The End ! Questions ?
Thank you Paul Valentine Technical Excellence Director