- News
All the latest updates on building safety reformRegulations latest
- Focus
- Comment
- Programmes
- CPD
- ºÚ¶´ÉçÇø the Future
- Data
2024 events calendar
ºÚ¶´ÉçÇø Awards
Keep up to date
- ºÚ¶´ÉçÇø Boardroom
All the latest updates on building safety reform
2024 events calendar
ºÚ¶´ÉçÇø Awards
Keep up to dateComparison of CEN and CWCT requirements | ||
Test | CEN European standard for curtain walling | CWCT UK standard for curtain walling |
Watertightness | Water flow rate 2 l/min/m2 | Water flow rate 3.4 l/min/m2 |
Wind resistance serviceability | Limit on deflection of framing members between points of attachment to structure 15 mm | Limit on deflection of framing members between points of attachment to structure 20 mm |
Residual deflection on unloading less than 5% of maximum | Residual deflection on unloading less than 1 mm | |
Displacement at fixings to structure not greater than 1 mm | ||
Load applied once in 25% increments each maintained for 15 seconds | Load applied five times without increments and maintained for three seconds on each application | |
Repeat airtightness | Air leakage at peak pressure not to exceed result of initial test by more than 0.3 m3/h/m2 | Air leakage to comply with requirements for first test |
Repeat watertightness | Not required | Required |
Dynamic watertightness | Optional in all cases | Optional for test pressures less than 600 pa. Required for higher test pressures |
Roving fan method | Aeroplane engine method | |
Wind resistance safety | No limit on deflection given | Permanent deformation of framing members shall not exceed 1/500 of the span measured between points of attachment to the building |
Site powered by