Presentations text content in Meson Detector Building Roof Repairs
Slide1
Meson Detector Building Roof Repairs
Slide2Prior to the Start of 2007 Repair Activities
Slide3MDB Roof After 2007 Repairs Completed
Slide4Damage to Membrane as a Result of Snow & Ice June 2009
Slide5Torn and Delaminated Coating
Slide6Delaminated Flexible Flashing
Slide7Water Intrusion & Corrosion at Bands
Slide8Complete failure of the roof membrane, as stated by GAF consultant from Trinity ERD
Elastomeric roof material did not completely adhere to roof deck causing it to pull apart during rain and snow/ice melt
Roof deck not completely cleaned
Multiple substrates for the roof membrane to adhere to (foam/concrete/metal)
Roof corrugations caused
ponding
of water and ice creating ice and snow slabs up to 1 ton
Roof membrane not evenly applied on roof surface
Open transition points at top flutes
Causes Relating to Failure of Roof
Slide9GAF & Riddiford
completed a roof inspection
Intermediate repairs completed that will take us through the winter & spring
Hand application (brush on) of top coat sealant in all twelve flutes
Scope of the intermediate
r
epairs
Repairs to the flexible flashing
Repairs to the blistered and delaminated areas
125 gallons of GAF top coat material used
Reduced the roof leaks by approximately 70%
Roof will develop more leaks
Present State of the MDB Roof
Slide10Remove r
oof
p
resently damaged
r
oof membrane &
s
ubstrate materials
Remove corrugations with 2 layers foam insulation
Install knife plate snow & ice breakers
Treat foam to metal deck transitions with flash grade topcoat
Install base & finish coats of GAF Elastomeric
m
embrane roofing
Complete work in two phases
Phase 1 complete repairs in 1-3 flutes during 4-5 weeks shutdown summer 2010
Phase 2 complete repairs to remaining flutes during long shutdown 2012
Tentative Long Term Repair Plan
Slide11Foam and Coating Application
Slide12Foam Application Area
Slide13Water Intrusion at
Slide14Slide15GAF standing behind the roof warrantyGAF hired Roof Consultant Trinity ERD to evaluate and identify repair solutions including laboratory testing of materials
GAF,
Riddiford
,
& Trinity
ERD has met with
the lab
to start development of a repair plan
Repair plan due from GAF within the next couple of weeks
Conclusion
Meson Detector Building Roof Repairs
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