This presentation discusses the requirements for pitched roof design considerations in both warm and cold roof constructions. It will cover breather membranes, air barriers and vapour control layers. It looks at the principals of condensation, the effects of condensation, issues of detailing cold pitched roofs i.e. insulation, ventilation and underlay.  It also looks at condensation controlling measures and solutions.

5 key learning points for this session:

1. Definition of BS5250 classes of pitched roof constructions
2. Difference between HR and LR Underlays
3. Vapour permeable underlay certification
4. Types of vapour permeable membranes and their properties
5. Management of moisture