Meson Detector Building Roof Repairs

Meson Detector Building Roof Repairs Meson Detector Building Roof Repairs - Start

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Meson Detector Building Roof Repairs




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Presentations text content in Meson Detector Building Roof Repairs

Slide1

Meson Detector Building Roof Repairs

Slide2

Prior to the Start of 2007 Repair Activities

Slide3

MDB Roof After 2007 Repairs Completed

Slide4

Damage to Membrane as a Result of Snow & Ice June 2009

Slide5

Torn and Delaminated Coating

Slide6

Delaminated Flexible Flashing

Slide7

Water Intrusion & Corrosion at Bands

Slide8

Complete 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

Slide9

GAF & 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

Slide10

Remove 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

Slide11

Foam and Coating Application

Slide12

Foam Application Area

Slide13

Water Intrusion at

Slide14

Slide15

GAF 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


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