Specifications - Addendum #1.pdf

MICHSPEC DTMB 00300 − 6 Addendum 1

ARTICLE 7 SCHEDULE OF CHANGE ORDER PRICES

7.1 The Bidder shall use this “Schedule of Change Order Prices” to propose contingent prices. The proposed contingent Change Order prices set forth in this schedule, at the sole discretion of the Owner, may, or may not be incorporated into the Contract Documents. The Owner reserves the right to negotiate contingent Change Order prices set forth herein prior to their possible incorporation into the Contract Documents.

Proposed Change Order prices will not affect determination of the lowest Bid.

7.2 Subject to their incorporation into the Contract Documents, as provided in the Agreement, the Bidder will add to, or deduct from, the Contract Work covered by the contingent prices that follow and accept in full payment, or allow in full credit, for that Work (a) those prices bid by the Bidder, or (b) if a particular price is not bid, the price proposed by the Owner (and shown in the appropriate column):

Item No. Bid Quantity

Description

Unit Price

Item Bid Price

5.1 300 SF Remove and Replace Rusted/Deteriorated Steel Deck

5.2 2,000 SF Wire Brush Prime Paint Rusted Steel Deck

5.3 200 SF Install New “Flat Stock” Deck Repair

5.4 1,500 LF Remove and Replace Existing Deteriorated Wood Nailers

5.5 50 Each Provide and Install new 30”x30” Walkway Pad

5.6 1,500 SF Remove and replace wet/damaged existing polyiso insulation (Applied to Alternate No.1).

Name of the Bidder _________________________________________

File No. _________

Date _________________________

SIGMA VENDOR NUMBER _________________________________

Telephone No. _______________________

SECTION 01010

SUMMARY OF WORK

File No.: 472/24263.SAA 01010 -1

Project Name: WHVCF - Phase 2: PSB & Fieldhouse Roof Replacement ADDENDUM 1: 6/15/26

PART ONE - GENERAL

1.01 DESCRIPTION

A. This section is intended for the contractor's general information only and is not intended to be a complete list of the work intended for this project.

B. The scope of work is indicated on the drawings and by the requirements of each section.

C. Project Description

1. Reroofing of all areas (excluding east canopy) of the Prisoner Service Building (PSB) and all areas of the Fieldhouse Building. The Base Bid Work includes complete removal of all existing roofing down to the existing structural steel deck and installation of new rigid insulation and new EPDM roofing on the low slope areas and installation of new rigid insulation, recovery OSB panels, underlayment and new standing seam metal panels on the steep sloped roof sections. The Base Bid also includes new tapered insulation at select drain valleys of the PSB main roof as well as on the lower slope areas. The work shall include all mansard metal panels on both buildings. The work shall also include new through wall masonry flashing at the top portion of the steep sloped metal panels to the adjoining higher masonry brick wall and the top of the wall flashing on the four small entrance roofs on the Fieldhouse Building. Work shall include all penetration and edge flashings. Work shall include installation of new exterior roof access ladder at the Fieldhouse Building. There is approximately 11,000 SF of EPDM, 15,000 SF of steep sloped standing seam metal roof and 3,400 SF 1,600 SF of mansard panel on the PSB and approximately and 11,500 SF of EPDM and 7,600 SF of steep sloped standing seam metal siding and 2,700 SF 1,000 SF of mansard on the Fieldhouse.

D. Project Description – Alternate Bid Work

1. Alternate No. 1 shall include a project DEDUCT to provide a roof system recovery roof on Sections A of the PSB and Sections A & D of the Fieldhouse in lieu of complete removal and replacement of all materials down to the structural roof deck. Work shall include leaving the existing insulation layers in place (including replacement of any existing insulation identified as wet or damaged), slicing the EPDM membrane and mechanically fastening a 1.5” recovery board and then installing the new EPDM, including all Base Bid flashing and trim. Roof recovery system shall achieve the same 20-year warranty as the Base Bid Work.

PART TWO - PRODUCTS

2.01 GENERAL

A. Products are specified in each of the technical specification sections and are shown on the drawings.

PART THREE - EXECUTION

3.01 DEMOLITION AND ROOF PREPARATION (General)

A. Provide and maintain all temporary utilities, enclosures, fencing of construction areas, interior protection, exterior protection, barricades, caution tape, temporary sanitary facilities and ground protection as necessary and as required by Section 01500 – Construction Facilities and Temporary Controls.

File No.: 472/24263.SAA 01010 -2

B. Provide and maintain a watertight barrier against moisture entry into the buildings. The buildings must remain watertight.

3.02 DEMOLITION AND ROOF PREPARATION

A. Remove the existing EPDM membrane and flashings, perimeter sheet metal, and penetration flashings at the scheduled areas of the PSB and Fieldhouse.

B. Remove all layers of insulation on the low sloped areas down to the structural steel roof deck. [Note: For Alternate 1 the existing insulation shall remain and shall be salvaged and reused in the new roofing system. Remove and replace existing wet/damaged insulation (unit price)].

C. Remove and dispose of the existing metal panel roof system, all underlayments, and all existing insulation on the existing steep sloped sections of the PSB and Fieldhouse. This shall including removing the metal siding at the mansards of these sections.

D. Remove all existing low sloped roof drain strainers and clamping rings and all drain inserts in order to install new replacement drain inserts as part of the new roof system.

E. Removal of the masonry bricks that are immediately above the sheet metal through wall flashings at the high end of the steep sloped metal panels and at the top of the existing membrane base flashing of the four small entrance roofs of the Fieldhouse . Demolition shall include removal of the existing metal through wall. Work shall be done in segments so that the existing brick above will be supported from falling. Contractor shall be responsible for repair and restoration of any brick that becomes damaged from the through wall restoration work.

F. Refer to Section 02050 – Roof Demolition.

3.03 ROUGH CARPENTRY

A. Inspect existing wood blocking for deterioration or damage. Remove and replace existing rotted/damaged wood blocking (unit price).

B. Install new wood blocking along perimeters to closely match the thickness of the new replacement (or recovery) insulation/roof system, as detailed or needed.

C. Install new wood blocking at isolated curbs to raise the curb flashings to a minimum 8 inches above the surface of the new roof membrane, as detailed.

D. Install a layer of new nominal ½” wood sheeting on the PSB & Fieldhouse Building Roof Sections ‘C’, mechanically attached to the steel roof deck through the new insulation layers.

E. Refer to Section 06100 - Rough Carpentry.

3.04 ROOF INSULATION

A. Install new tapered insulation immediately surrounding each primary roof drain to promote positive drainage.

B. Provide rigid insulation infill to replace existing isolated wet/damaged insulation for Alternate Work (on a unit price basis).

File No.: 472/24263.SAA 01010 -3

C. Install two layers of new rigid insulation (minimum R-Value of 30) mechanically attached to the deck to Section A of the PSB and the upper roof Section of the Fieldhouse. Include new tapered ¼” per foot tapered crickets and saddles as shown on the roof plan. [Note: Tapered insulation layer may be sandwiched between the two new layers of rigid insulation in lieu of being set above the two layers.]

D. Install two layers of new rigid insulation (minimum R-Value of 30) and install new1/8” tapered insulation on the long and narrow low slope lower roofs of both PSB and Fieldhouse. [Note:

Tapered insulation layer may be sandwiched between the two new layers of rigid insulation in lieu of being set above the two layers.]

E. Install two layers of new rigid insulation (minimum R-Value of 30) and install new1/4” tapered insulation on the four small entrance areas of the Fieldhouse. [Note: Tapered insulation layer may be sandwiched between the two new layers of rigid insulation in lieu of being set above the two layers.]

F. Install special “back taper” insulation on the long and narrow low slope areas of both PSB and Fieldhouse to provide a smooth transition to the adjoining metal panel roof system.

G. Provide new 1.5” rigid insulation recovery board, mechanically attached through the existing roof system for Alternate 1.

H. Refer to Section 07241 - Roof Insulation.

3.05 LOW SLOPED ROOF MEMBRANE / FLASHINGS

A. Over the completed insulation substrates on the low sloped sections install a new fully adhered EPDM (thermoset) single ply roof system per the requirements of Section 07535 – Fully Adhered EPDM Single Ply Roofing.

3.06 STEEP SLOPED ROOF SYSTEM

A. Over the completed insulation substrates on the steep slope sections install a new standing seam metal panel roof system per the requirements of Section 07410 – Standing Seam Metal Roofing.

B. At the vertical mansards, over the prepared substrate, install new standing seam metal mansard panels per the requirements of Section 07410 – Standing Seam Metal Roofing.

3.07 ROOF RELATED SHEET METAL

A. Install new edge metal and counterflashing.

B. Install all other sheet metal flashings, as shown on the drawing or as required.

C. Refer to Section 07620 – Roof Related Sheet Metal.

3.08 PLUMBING (Base Bid)

A. Install new drain inserts at all existing low slope roof drains (following removal of the existing strainers and clamping rings) and install new drain inserts. For the locations of “overflow drains” install new overflow drain ring piece with the new insert.

B. Remove and replace all existing drain inserts with new drain inserts. with new adjustable cast iron drains. (See Section 15410)

File No.: 472/24263.SAA 01010 -4

3.09 MISCELLANEOUS WORK/SPECIAL WORK

A. Where conduit exists running along the underside of the metal roof deck flutes and underneath the roof deck (above the joists and up under the raised deck flange) Contractor shall make a special effort to map those locations so that they do not install new mechanical anchors into those conduits during the attachment of the new insulation.

B. At the roof hatch flashing on Section A of PSB, lift the existing hatch and reset on new blocking to match the new insulation elevation. This work shall include salvaging and resetting the existing hatch guardrail.

C. Where existing fan units currently exist, they may need to be lifted and reset. Cost to unfasten and lift and reset units that do not need any other extension, or connections will be included with the base bid pricing. Should units need to have any electrical or mechanical extensions or connections, the costs related to extension or modification of electrical or other supply lines shall be reimbursed to the Contractor as part of the Contingency work. Where modification work is determined necessary, Contractor shall first notify Facility Operations to coordinate such work, as well as allow them the opportunity to perform the work in-house if desired. Contractor shall not disconnect or cause any equipment to stop functioning without advanced coordination and approval.

D. Contractor shall furnish and install one (1) new exterior roof access ladder at the Fieldhouse

Building between roof Section ‘A’ and ‘D’. Contractor shall coordinate access ladder requirements with the State and Department of Corrections. Ladder type shall be fixed access with cage and lockable security guard door. Contractor to submit product data for approval by State and Department of Corrections.

3.10 ALTERNATE WORK

A. Alternate No. 1 shall be to salvage the existing insulation of Sections A of the PSB and the Upper Section of the Fieldhouse. All existing metal flashings shall be removed. The membrane shall be cut/sliced at approximately 36 inches on center. The existing insulation shall be spot checked to look for any localized “wet” areas (to be replaced on a unit price basis). A new 1.5” ISO recover board shall be laid out and mechanically attached. All scheduled penetration and perimeter details shall remain essentially the same as the Base Bid Work and shall include all minor adjustments to wood blocking or flashing due to a change in membrane elevation.

3.11 UNIT PRICING

A. The following items may be included in the scope of work and will be performed at unit prices. Set amounts of some items are to be included in the base bid.

1. Remove and replace existing deteriorated steel roof deck (per square foot)

2. Wire brush, clean, and prime paint areas of steel roof deck (per square foot)

3. Clean, prime, paint, and install flat stock roof deck repair (per square foot)

4. Remove and replace existing deteriorated wood nailer/wood blocking (per board ft)

5. Provide and install new 30”x30” walkway pads (per each)

6. Remove and replace existing polyiso insulation (per square foot)

B. The Bid Summary Page includes select allowances for unit price work (see Bid Schedule

Page and Schedule of Change Order Prices Page).

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