City Hall Full Flat Roof Replacement

2026-11-03

1 . 1 Demolition and Removal  Remove all existing roofing materials , membranes , flashings , insulation , and fasteners down to the structural roof framing .  Remove only deteriorated or damaged roof decking .  Properly dispose of all debris off - site .  Protect the building interior and adjacent areas during demolition .  Any concealed damage discovered during demolition shall be reported to the City prior to repair or replacement . 1 . 2 Structural Roof Deck ( Wood )  Furnish and install any needed replacement of roof deck over existing roof framing .  Decking shall comply with the 2015 IBC for material type , thickness , span rating , and fastening .  Deck fastening shall meet IBC and roofing manufacturer requirements .  Deck shall provide a suitable substrate for the insulation and roof membrane system . Structural roof framing modifications are not included unless specifically authorized in writing by the City . 1 . 3 Insulation and Energy Compliance  Install a new roof insulation system with a minimum overall thermal resistance of R - 38 , in compliance with the 2015 IECC .  Insulation may include rigid board and tapered insulation as required to achieve positive drainage .  Insulation shall be installed and secured in accordance with manufacturer specifications . 1 . 4 Roof Drainage  Existing roof drainage components , including roof drains , scuppers , and internal piping , shall remain in place , unless otherwise noted .  Contractor shall integrate the new roof system with existing drainage components .  Roof assembly shall provide positive drainage toward existing drains or scuppers .  Overflow drainage shall be maintained or provided as required by the 2015 IBC .  Drainage functionality shall be verified prior to final acceptance . 1 . 5 Roof Membrane System  Install a new roofing membrane system suitable for flat roof applications .

Missouri

2026-04-29