DuPont™ Tyvek®

This presentation demonstrates the significant role that vapour permeable pitched roof underlays play in preventing harmful condensation, resisting wind driven moisture, increasing thermal efficiency by reducing wind-washing and reducing the load on the external roof covering by absorbing wind uplift under all conditions and in all 5 wind uplift zones across the UK. Also included are air and vapour control layers (AVCL) and the important part they play in modern buildings.By the end of this CPD, delegates should:1. Understand building regulations/technical standards.2. Understand the requirements of BS5534.3. Understand the requirements of BS5250.4. Understand installation techniques for different systems.5. Understand the basics of thermally efficient pitched roof designs - VPU and AVCL.This seminar is also available online.

The British Construction Industry is changing for the better with a clear focus on safety and energy efficiency.Membrane systems have long been used in framed constructions to:1. Improve building longevity by protecting the frame from the harmful effects of uncontrolled moisture2. Improve thermal perormance by reducing air leakageThis CPD deals with the nuances of these systems when incorporated into high risk buildingsThe presentation considers regulatory framework (Parts B, C and L), system performance and how these systems are incorporated into designs and then built.In addition to considering the present, the presentation also considers the past history of these systems and the role of manufacturers in collaboration for a better and safer future.By the end of the CPD, delegates ought to:1. Understand the primary functionality of vapour permeable and AVCL type membranes.2. Understand the regulatory framework surrounding these systems.3. Understand the installation of these systems, especially nuances added by the amendments to Part B in recent years.