EHN1 Roof consolidation

EATM - 24-03-2015

F. Magnin – GS/SE/CEB

EHN1 - Characteristics

Construction year: 1977 Primary use: Experimental hall Total surface: 15.000+ m2 Construction materials

Metallic structure and cladding Concrete slab Metal sheet / insulation / bituminous waterproofing

Roof issues

Recurring leaks Worn out waterproofing membrane Air bubbles Saturated insulation at low point

Executed works

Identification of the most critical area Reinforcing waterproofing membrane over 2000+ m2

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)

What is next for EHN1 consolidation

Keep going with phased roof consolidation Widening access to helium tank on the Jura side

(April 9th) Dealing with toilet evacuation issue Consolidation of the access ramp to the building on

the Jura side