External wall system

Building Safety Programme: estimates of EWS1 requirements on residential buildings in England, suggests that for the purposes of its analysis non-cladding, states: 'External wall systems (EWS) are the combination of the external facing material (e.g. brick) and the insulation within the external wall. Each building may have one or more external wall systems.' Ref https://www.gov.uk/government/publications/building-safety-programme-estimates-of-ews1-requirements-on-residential-buildings-in-england/building-safety-programme-estimates-of-ews1-requirements-on-residential-buildings-in-england

Planning Gateway One - Glossary, published on the Planning Portal, suggests that the external wall of a building includes all of the following:

• Anything located within any space forming part of the wall.
• Any decoration or other finish applied to any external (but not internal) surface forming part
• of the wall.
• Any windows and doors in the wall.
• Any part of a roof pitched at an angle of more than 70 degrees to the horizontal if that part of the roof adjoins a space within the building to which persons have access, but not access only for the purpose of carrying out repairs or maintenance

[edit] Related articles on Designing Buildings

• ACM cladding.
• Cladding.
• EWS1.
• HPL cladding.
• Non-ACM cladding.
• Rainscreen.