Ratify Emergency Contract - State Theater Roof Repairs Proj No 125-030 - Slatile Roofing

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K I L P a g e 7 ARCHITECTURE P L A N N I N G www.kilarchitecture.com 1 1 2 6 L I N C O L N W A Y E A S T S O U T H B E N D I N 4 6 6 0 1 ( 5 7 4 ) 2 8 8 . 2 6 5 4 V O I C E 2 8 9 . 2 4 2 0 F A X III. Critical Needs Assessment: State Theater – Stabilization and Mothballing 2. Roof, Flashings, Penetrations: It is not clear when the roof was last replaced, however it appears to be intact for 80 to 90% of the high roof, where ethe seams are largely stable and suggest the current roof is between fifteen and twenty years old. The material is a black EPDM membrane roof over a fibrous sub layer about ¾” thick laid over a cast in place gypsum roofing deck supported by longspan steel trusses and smaller steel framing members. At the low points adjacent to the roof drains, the underlayment is OSB. The existing roofing system appears to be compromised completely in two locations, with additional smaller holes elsewhere. The first location is at the northwest corner where a roof drain was originally located. This area has developed a large hole in the membrane exposing the gypsum deck and steel structure beneath to extreme amounts of water to the point that the gypsum decking has collapsed in a roughly ten by ten square foot area. This location is open to the elements and is responsible for extensive damage to the interiors in this area. The second area is near the southeast corner of the building, also adjacent to a roof drain, where the aluminum parapet cap has failed and is completely removed from the masonry parapet, allowing the membrane to loosely flap in the wind, and allowing the eleme nts to penetrate the masonry wall, gypsum roof deck, and enter the interior of the building. This moisture has led to extensive damage to the south wing of the stage and south balcony, where plaster has been documented as fallen within the past six to eight months. It is our recommendation to remove the roof membrane, flashing, and underlayment’s entirely down to the gypsum roof deck. Per the structural assessment we recommend at a minimum, replacement of the gypsum roof deck around the entire perimeter of the building from the exterior wall to the first roof purlin (approximately 8’ from the perimeter wall.) where water has been trapped by clogged drains and overflow scuppers. To get the building dry, the deck will need to be repaired/replaced as required, with a new white TPO membrane installed over the top, with new flashings and parapet caps all around. We recommend considering adding rigid insulation to the roof during this repair work.