1. EHN1 Roof consolidation EATM - 24-03-2015 F. Magnin – GS/SE/CEB

2. EHN1 - Characteristics  Construction year: 1977  Primary use: Experimental hall  Total surface: 15.000+ m 2  Construction materials  Metallic structure and cladding  Concrete slab  Metal sheet / insulation / bituminous waterproofing

3. Roof issues  Recurring leaks  Worn out waterproofing membrane  Air bubbles  Saturated insulation at low point

4. Executed works  Identification of the most critical area  Reinforcing waterproofing membrane over 2000+ m 2  Replacing saturated insulation  Isolating renovated area from the rest of the roof  Treatment of the roof crossing (ducts, pipes)  Total cost: 155 kCHF (BC-76388 / 76389)

6. What is next for EHN1 consolidation  Keep going with phased roof consolidation  Widening access to helium tank on the Jura side (April 9 th )  Dealing with toilet evacuation issue  Consolidation of the access ramp to the building on the Jura side