07410 STANDING SEAM ROOFING - Addendum #2.pdf

SECTION 07410

STANDING SEAM ROOFING

File No.: 472/24263.SAA 07410 -1

Project Name: WHVCF - Phase 2: PSB & Fieldhouse Roof Replacement ADDEDNDUM 2: 6/29/26

PART ONE - GENERAL

1.01 Description

A. Furnish and install a weathertight and watertight standing seam metal roof, as shown on the drawings and as specified herein.

B. Related Sections

1. Section 02050 – Roof Demolition

2. Section 02411 – Selective Demolition

3. Section 04012 – Maintenance of Masonry

4. Section 05315 – Steel Deck Repair

5. Section 06100 – Rough Carpentry

6. Section 07241 – Roof Insulation

7. Section 07525 – Fully Adhered EPDM Single Ply Roofing

8. Section 07620 – Roof Related Sheet Metal

9. Section 07920 – Sealants and Caulking

1.02 Quality Assurance

A. Qualification of the Manufacturer: Products used in the work of this section shall be produced by manufacturers regularly engaged in the manufacture of similar items and with a history of successful production acceptable to the consultant.

B. Qualification of the Installer: Use adequate numbers of skilled workmen who are thoroughly trained and experienced in the necessary crafts and are completely familiar with the specified requirements and the methods needed for the proper performance of the work in this section.

C. In acceptance or rejection of the work of this section, the consultant will make no allowance for lack of skill on the part of the workmen.

D. Roofing Inspections

1. Make all required notifications and secure all required inspections by the manufacturer of the approved materials to facilitate issuance of the specified roof warranty.

E. References

1. Materials used in this section shall be listed in the latest edition of the following:

File No.: 472/24263.SAA 07410 -2

a) FM Global System Approval Guide

b) Underwriters Laboratory, Inc. - Building Materials Directory

1.03 Submittals

A. General: Comply with provisions of Section 01340.

B. Immediately after the contract is awarded, submit:

1) Shop drawings showing location, diagrams, dimensions, and details of proposed fabrication and installation.

2) Manufacturer's specifications and other data required to demonstrate compliance with specified requirements.

3) Manufacturer's recommended methods of installation. When approved by the owner, the manufacturer's recommended methods of installation (unless superseded by this specification) will become the basis for inspecting and acceptance or rejection of the actual installation procedures used on this work.

C. Gauges of sheet metal specified in this section are minimums.

1.04 Scheduling

A. Work is to be performed on a daily basis, with each section completed before progressing to the next days work.

B. Completion of work shall be defined as the installation of all specified roof preparation, preformed metal roof panels, related flashings, counterflashings, sheet metal accessories, fasteners, and sealants.

C. Contractor shall complete roofing work on a daily basis unless specifically directed otherwise by the owner’s representative.

1.05 Delivery, Storage, and Handling

A. Use all means to protect the materials of this section before, during and after installation, and to protect the work and materials of all other trades. Roof surfaces shall be protected from damage at all times.

B. Deliver only new materials to the job site. Materials shall be stored in such a manner as to be protected from rain, snow, or inclement weather. When storing materials on the roof, do not overstress the structure.

C. In the event of damage, immediately make all repairs and replacements to the approval of the consultant and at no additional cost to the owner.

File No.: 472/24263.SAA 07410 -3

1.06 Warranty

A. Contractor’s Guarantee

1. All new materials and workmanship covering work provided under this section of the specifications shall be warranted in writing by the contractor to maintain all sheet metal panels and related metal flashing in a watertight condition without cost to the owner for a period of two (2) years after date of final completion.

B. Manufacturer’s Warranty

1. Provide standing seam roofing manufacturer’s special twenty (20) year labor and material warranty covering leakage, including all flashing details and seams.

2. Provide standing seam roofing manufacturer’s twenty (25) year paint finish warranty against cracking, peeling or fading and against panel corrosion.

PART TWO - PRODUCTS

2.01 Description

A. Furnish and install, complete, a new standing seam roof system as described herein.

2.02 Products/Systems

A. The new roof system shall consist of 18” wide striated panels or as approved by the owner. Panels shall be roll formed from 24 gauge (minimum) prefinished steel with equally spaced stiffing ribs to minimize the effects of oil canning. (25-year warranty on the finish). The exterior finish shall be a Kynar 500 resin fluorocarbon coating with a 1.0 mil dry film thickness. Color to be as selected by the owner from manufacturer’s standard colors. Panel finish color to match as closely as possible to the panels recently installed at other nearby buildings.

Seams shall be a minimum 1.75" high.

B. Panels shall be roll formed and cut to the lengths required by existing field conditions. Panel end laps in the field of the roof shall not be allowed.

C. Panels shall be secured with concealed cleats to allow for longitudinal panel movement. Cleats shall be secured to the wood framing as recommended by the roof system manufacturer. The manufacturer shall determine the size, spacing, and securement of the cleats. Installed standing seam roof system shall meet U.L. Class 90 wind uplift rating. Minimum panel securement shall be 2'-0" O.C.

D. In no case shall panel fastener heads be left exposed to the elements.

E. All ridge and rake edge flashings shall be formed to allow for expansion/contraction in all directions and shall be completely watertight.

File No.: 472/24263.SAA 07410 -4

F. All accessory items not specifically addressed herein shall be considered as implied in order to provide and maintain a watertight installation for the duration of the warranty period.

G. All accessories such as clips, closures, ridge caps, counterflashings and base flashings to be supplied by the manufacturer or by a manufacturer approved source.

H. All brake formed accessory flashings, edgings, and trim shall be either factory made or field formed in minimum 24 gauge steel in the same color and finish as the roof panels.

I. Concealed back up support plates, if required by the roof system manufacturer, shall be minimum 18 gauge galvanized steel.

J. Underlayment

1. Nominal 40 mil self-adhering modified underlayment shall be installed at the eaves and valleys, as well as over the entire roof, as detailed. Self-adhered modified shall be a high temperature product to reduce the chance of damage directly below the metal roof panels.

2. An additional underlayment may be installed over the high temperature self adhered product if required or recommended by metal panel manufacturer. Product must be compatible and pre-approved for use with the metal panel system manufacturer.

3. Special Note: The sloped metal panel roofs shall have two layers of 2.6”

ISO and a new nominal ½” plywood sheeting and underlayment installed prior to the new standing seam roof panels.

K. Approved Manufacturer's and Roof Systems

1. Una-Clad UC-14 by Holcim Elevate.

2. Medallion-Lok by McElroy Metals

3. Cee-Lock by Berridge Manufacturing Co.

4. DMC 175S Profile by Drexel Metals

PART THREE - EXECUTION

3.01 Description

A. The latest manufacturer specification and installation techniques are to be followed with the following requirements. These specific minimum requirements must be included in your bid and are not to be altered.

File No.: 472/24263.SAA 07410 -5

3.02 Inspection

A. Examine the existing roof surface. Correct conditions detrimental to proper and timely completion of the work. Do not proceed until unsatisfactory conditions have been corrected.

B. A new nominal ½” sheeting panel shall be installed to provide a substrate for the new sloped metal panel roof system. New sheeting is not required for the vertical mansard panel installation (only the sloped panels that run down and onto the lower low sloped EPDM roofing).

3.03 Underlayments/Separator Sheets

A. Provide and install underlayments and/or separator sheets as required by the system manufacturers and as shown on the detail drawings. [Note: For this project, the high temperature self adhered modified underlayment is to be installed over 100% of the roof surface, with a second layer at the eave and in the valleys. The amount of self adhered membrane is desired to achieve the design recommendations for a 30 year system.]

3.04 Workmanship

A. Form all sheet metal accurately and to the required dimensions and shapes.

B. All exposed edges of cut sheet metal shall be folded back on concealed surfaces.

C. Form, fabricate, and install all sheet metal to adequately provide for expansion and contraction in the finished work.

3.05 Installation - General

A. Metal panel installation shall be made in accordance with manufacturers recommended procedures and layout drawings including fastening requirements to achieve U.L. Class 90 wind rating. Minimum fastening shall be minimum 4'-0" O.C.

B. Concealed cleats shall be required.

C. No face penetrations or perforations shall be made in panels fastened by concealed cleat method without prior approval of the owner's representative.

D. Metal panel end laps in the field of the roof shall not be allowed unless panel lengths exceed 50 feet. Panels shall be fabricated to required lengths, as field conditions require, to eliminate the need for panel end laps. Where panels will exceed 50 feet, there will be an allowance for a field lap, provided that laps are installed in accordance with the Manufacturers recommendations. If panel field end laps can be avoided, that would be desired.

E. Exercise proper care during installation to avoid damage or scratching of the panels. Avoid walking over the panels after installation is completed.

F. Finish all sheet metal watertight and weathertight where so required.

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3.06 Metal Flashings

A. Join parts with rivets or sheet metal screws where necessary for strength or stiffness.

B. Provide suitable watertight expansion joints for all sheet metal flashings as required for proper installation.

C. Caulking of sheet metal flashings shall be neatly and thoroughly performed for a watertight seal.

3.07 Cleanup

A. Touch up all minor scratches and spots. Panels with large dents or scratches will be rejected and shall be replaced with new panels at no cost to the owner.

B. Debris from sheet metal work shall be removed from building site on a daily basis.

C. Leave job site absolutely clean at completion of each day’s work and properly dispose of all construction debris.

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