ADDENDUM #1 BID #2020-87

Roof Replacement – Osborn Hill Elementary School

26th May, 2020 – It is intended that this Addendum incorporating the following corrections, revisions, additions, deletions and clarifications become part of the Contract Documents, including pricing as submitted.

New Information: 1. A pre-bid conference was held at Osborn Hill Elementary School, 760 Stillson Road, Fairfield, at 11:00 am on Tuesday, the 19th of May, 2020 concerning this solicitation. A copy of the sign-in sheet from that walk-through event has been posted to the Town’s website. A direct link to the sign-in sheet document is provided below:

2020-87 Pre-Bid Sign-In Sheet - Roof Replacement Osborn Hill Elementary School 2. “The Governor of the State of Connecticut declared a state of emergency on March 10, 2020, due to COVID-19 (coronavirus

disease 2019), and public health officials currently recommend people avoid assembling together in groups of five (5) or more to help prevent the further spread of COVID-19. Based on this public gathering restriction, all public bid openings have been cancelled. Instead, the Town of Fairfield’s Purchasing Department will “broadcast” the bid opening on a telephone conference call line so that bidders, prospective bidders, and other persons may listen to the bid opening event. The Town’s Purchasing Department will post information about the telephone conference line on the Town’s Purchasing Department website 48 hours prior to the bid opening event. This change in procedure is intended to help protect the health and safety of the public and the Town of Fairfield employees during the COVID-19 outbreak in Connecticut.”

3. Please see the attachment to this addendum containing the scope of work as read by the Architect at the pre-bid meeting. 4. If you are planning to visit the project site, please arrange access by calling Sal Morabito, Manager of Construction, Safety & Security at 203.650.0083

Response to Questions:

1. Do you anticipate extending the bid due date? Response: No, we do not anticipate extending the bid due date at this time. 2. What additional details are you willing to provide, if any, beyond what is stated in bid documents concerning how you will identify the winning bid? Response: Bid results will be posted to the Town website. 3. Was this bid posted to the nationwide free bid notification website at www.mygovwatch.com? Response: This bid invitation was posted to the Town of Fairfield and to the Connecticut Department of Administrative Services websites.

ADDENDUM #1 BID #2020-87

Roof Replacement – Osborn Hill Elementary School (page 2 of 3)

4. Other than your own website, where was this bid posted? Response: Other than the Town of Fairfield website, this bid was posted to the Connecticut Department of Administrative Services website. 5. Are there any hard ceilings or are they all drop ceilings? Response: All ceilings are drop ceilings aside from one area of the ceiling in the library. 6. Please confirm the number of windows that are being replaced on this project, as well as their locations. Response: For your reference, please see the attached addendum #1 document from Hibbard & Rosa Architects, LLC.

7. Can plumber/Electrician visit site for further investigative look? Response: Yes, to arrange a site visit please refer to the contact details under New Information of this Addendum. 8. Regarding Raising of Existing Conduit, can we assume to re-use existing conduit at roof level with a new conduit extension at roof edge drop and a new feed from existing junction box down to electrical panel below in mechanical room? Response: For your reference, please see the attached addendum #1 document from Hibbard & Rosa Architects, LLC. 9. Reference Modified Bituminous Membrane Roofing Section 075200 Part 2-Products, 2.1 Manufacturers. Siplast is listed as basis of design with Tremco and Soprema list as additional manufacturers and an Approved Equal Notation. Will Products from Johns Manville and or GAF be noted as approved equals as long as they meet the 20 Year Warranty Requirements? Response: For your reference, please see the attached addendum #1 document from Hibbard & Rosa Architects, LLC.

10. Reference Modified Bituminous Membrane Roofing Section 075200; 3.2 Polyisocyanurate Insulation Installation. Will it be acceptable to Mechanically Fasten the Cover Board, Tapered Insulation and Base Layer Insulation thru to metal roof deck below? Or set Cover Board in low rise adhesive and Mechanically Fasten Tapered Insulation and Base Layer Insulation thru to metal roof deck? In lieu off fastening the Base Layer insulation, setting the Tapered and Cover Board in low rise adhesive? Response: For your reference, please see the attached addendum #1 document from Hibbard & Rosa Architects, LLC.

11. Architect read aloud scope of work items during pre-bid. The narrative however is not found in the bid specification sheets. Please provide detailed scope of works mentioned during the walkthrough.

Response: For your reference, please see the attachment to this addendum containing the scope of work as read by the Architect at the pre-bid meeting.

12. Bid specifications includes Fuss & O’Neill asbestos report pertaining to a different school (Enfield School). Please provide accurate information on asbestos and other hazardous materials for Osborn Hill School. Response: For your reference, please see the attached document containing the updated hazardous material survey for Osborn Hill Elementary School.

ADDENDUM #1

BID #2020-87 Roof Replacement – Osborn Hill Elementary School

(page 3 of 3) 13. I would like to have a Plan-Holders list for the subject project. Response: There is no plan holders list for this project. However, the Town did conduct a pre-bid conference for this project. A link to the copy of the sign-in sheet is available on the Town’s website. For your convenience, a link to that document is provided below:

2020-87 Pre-Bid Sign-In Sheet - Roof Replacement Osborn Hill Elementary School 14. Was the walk-through mandatory? Response: No, as per the bid invitation, the pre-bid meeting was strongly encouraged but non-mandatory. 15. How can we acquire a set of plans? Response: Refer to the links below for all documents related to this bid.

Drawings - Roof Replacement - Osborn Hill Elementary School

Invitation to Bid - Roof Replacement - Osborn Hill Elementary School

Prevailing Wage Rates - Roof Replacement Osborn Hill Elementary School 16. Can we get clarification from the architect regarding the flashing cap sheet that he has specified?

Spec calls for:

Siplast Paradiene 40 FR which is 154 mils and granulated Soprema Sopralast 50 TV Alu which is 160 mils, foil faced, and torch applied. This is a cold spec and

product should have been Sopralast 50 TV Alu Sanded. Also the foil faced is a lot more expensive.

These two sheets are not equal. I would like to propose using:

Sopralene 180 FR GR which is 160 mils and granulated

Response: For your reference, please see the attached addendum #1 document from Hibbard & Rosa Architects, LLC.

17. Roof plan indicates there are 2 windows that are to be removed and replaced with new, at the pre-bid walk through there was a window that appeared that also have minimal flashing height. Please confirm if window is to be removed and replaced. Response: For your reference, please see the attached addendum #1 document from Hibbard & Rosa Architects, LLC.

End of Addendum #1

Company: ____________________ Name: _____________________ Signature: _________________ Date: _____________

HIBBARD & ROSA ARCHITECTS, L.L.C.

100 RIVERVIEW CENTER - SUITE 272 - TEL. – MAIN STREET - (860) 346-1809 MIDDLETOWN, CT 06457

Project Name: Partial Roof Replacement Osborn Hill Elementary School

760 Stillson Road

Fairfield, CT

Project Number: 051-0151 RR

Project Scope:

The Osborn Hill Elementary School partial roof replacement project encompasses an area

of approximately 43,731 sq. ft. Roof areas A, B, C, E, F, G, H, J, K, M and O on the

schematic roof plan will be will be removed down to the existing flat metal roof deck.

These roof areas will have a new 2 ply modified roof with mineral surface installed. The

new roof system will be installed on 1/4” per ft. tapered insulation with a minimum

thickness of 4.2” over the base layer of insulation, which shall be mechanically attached

with all additional layers adhered.

The insulation will have a minimum depth of 4.2”. All finished roof areas will have a

minimum roof slope/pitch of ¼” per ft. minimum and an average R-value in excess of 30.

The finished roof system will have a roof surface slope of ¼” per ft. minimum.

The existing roof drains will be replaced. New roof drains are required due to the

increased depth of the new insulation system. The addition of overflow scuppers is

included in the project and is required to meet the current State Building Code.

Replacement of the metal gravel stop/fascia will be required at perimeter locations to

accommodate an increase in wood blocking and tapered insulation height/depth at the

roof edge/perimeter. The metal fascia will be an extrude aluminum fascia supplied by the

roof system manufacturer as required to obtain an edge to edge warranty.

Two existing window assemblies in the cafetorium located above roof area C and E will

be removed. The existing window assemblies are approximately 2-1/2” above the

existing roof surface and the requirement to increase the depth of the new tapered

insulation system will result in the new tapered insulation system and roof membrane

covering the bottom edge of the two existing window assemblies. Additionally,

recognized code and industry standards require a minimum 8” flashing height be

maintained above the finish roof surface. These requirements will require the sill of the

existing window opening(s) to be raised 16”. This will require the installation of two

courses of concrete block.

This window system must be removed in its entirety from the existing openings to raise

the sill 16”. The existing window system cannot be modified or adapted to be reinstalled

in the new/smaller window openings.

Once the knee wall has been installed the smaller window openings will have a new

thermally broken aluminum window system will be installed.

An existing window assembly (located above the suspended ceiling in the kitchen) above

roof area C will be removed and infilled with a brick and concrete block masonry wall.

The existing window assembly is approximately 3” above the existing roof surface and

the requirement to increase the depth of the new tapered insulation system will result in

the new tapered insulation system and roof membrane covering the bottom edge of the

existing window assembly. The new masonry wall will allow the new flashing to be

raised to meet the minimum 8” flashing height requirement.

Where indicated on the drawings existing through wall flashing will be raised to maintain

a minimum flashing height of 8” once the new tapered insulation is installed.

The existing roof hatch will be removed and replaced with a new roof hatch with a taller

curb to accommodate the increase in the depth of the new insulation system. Additionally

the new roof hatch will have a safety cage provide by the roof hatch manufacturer and a

ladder -up safety post to comply with all current safety standards.

The existing roof top mounted gas line and two electrical conduits (electrical service for

the portable classrooms) will be raised approximately 8” to accommodate the increase in

the depth of the new insulation. Currently the existing gas line and electrical conduits are

supported on 4” x 4” wood blocking. The existing wood blocking will be replaced with

neoprene dunnage blocks. Wood dunnage is not recommended.

Where indicated on the drawings the existing wood dunnage will be replaced with

neoprene dunnage to meet the requirements of the roofing manufacturer. Wood blocking

is not a recommended material for dunnage. Additionally, the installation of the new

tapered insulation system will require the support legs/structures resting on the dunnage

be adjusted in length.

The unit prices included in the bid are for the replacement of metal roof deck and

replacement of deteriorated wood blocking.

The new built-up roof system will have a 20 year non pro-rated, no dollar limit warranty

and will meet or exceed all other State of Connecticut Building Code and Office of

School Construction Grants requirements.

An Add Alternate is included in the bid to increase the new roof system warranty from 20

years to 25 years.

ADDENDUM #1

PARTIAL ROOF REPLACEMENT OSBORN HILLS ELEMENTARY SCHOOL

FAIRFIELD, CT

Hibbard & Rosa Architects, L.L.C. Middletown, Connecticut The following changes, revisions, and/or additions are hereby made a part of the Contract Documents and shall supersede previously issued documents and shall become a part of the contract documents. Date: May 21, 2020 Information to Bidders: The Contractor may re-use the existing roof top electrical conduit or any portion/ section thereof. If the Contractor elects to use the existing electrical conduit it must be installed and warrantied as new. Any cost associated with ensuring the conduit is installed as new is the sole responsibility of the contractor. Upon reinstallation the Contractor shall ensure the conduit is clean of any mastics, asphalts, roofing adhesives, etc. Information to Bidders:

All request for the substitution of materials and roofing systems must be submitted in accordance with the Contract documents. All materials and roofing systems submitted must meet all the requirements of the Contract Documents. Refer to the Instructions to Bidders included in the contract specifications.

Information to Bidders: The cover board and tapered polyisocyanurate insulation must be installed with the approved adhesive. Mechanical attachment of the covered board and tapered insulation IS NOT allowed. The base layer of 2.7” (flat stock) polyisocyanurate insulation will be mechanically attached (screw fastened) to the metal roof deck in accordance with the contract documents. Information to Bidders: The Contractor shall remove and dispose of duct insulation and EPDM wrap from the roof top duct work located at the rear of the cafetorium. The Contractor shall clean and inspect the duct for any damage and install new 2” thick, 3lb density mineral wool fiberglass insulation (class A fire rated) and wrap with .060 EPDM (fully adhered installation).

Information to Bidders: All four (4) clerestory windows in the Cafetorium will be removed, sill height raised 16” (2 block courses) and new fixed window system installed. Refer to detail 3/A-5. Information to Bidders: Updated hazardous material surveys attached. Date: May 22, 2020 Information to Bidders: Soprema, Sopralene 180 FR GR, SBS modified bitumen cap ply with white granules is approved

END OF ADDENDUM #1

Environmental Consultants (203) 324-2222 And Laboratory Services Fax (203) 324-9857

HYGENIX, INC. 49 Woodside Street Stamford, CT 06902

April 29, 2020

Hibbard & Rose Architects 363 Main Street Suite 401 Middletown, CT 06457 Attn.: Tom Hibbard RE: Osborn Hill Elementary School (Asbestos Roof Sampling) 760 Stillson Road Fairfield, CT Dear Mr. Hibbard: On April 22, 2020 I visited the above referenced site to perform an investigation of the different roofing materials that will be disturbed in upcoming renovations for asbestos containing materials. A PCB inspection was also performed at the site and is discussed in a separate letter/report. Tom Hibbard, of Hibbard & Rose Architects, identified each of the roofs that will be replaced and had a professional roofer on site to cut and patch all sample locations. A visual inspection was then performed to identify the different types of roofing materials that are present in the areas scheduled for renovations. From each material identified, samples were collected and sent to AmeriSci New York where they were analyzed by polarized light microscopy (PLM). The following are the results of the samples collected: SUMMARY TABLE OF ROOF SAMPLING FOR ASBESTOS

SAMPLE NUMBER

ROOF LOCATION

SUSPECT MATERIAL

SAMPLE RESULT

0422-01 Roof B Light Gray, Pliable Window Caulk Not Asbestos Containing 0422-02 Roof C Light Gray, Pliable Window Caulk Not Asbestos Containing 0422-03 Roof A Roof Field Not Asbestos Containing 0422-04 Roof B Roof Field Not Asbestos Containing 0422-05 Roof C Roof Field Not Asbestos Containing 0422-06 Roof E Roof Field Not Asbestos Containing 0422-07 Roof G Roof Field Not Asbestos Containing 0422-08 Roof H Roof Field Not Asbestos Containing 0422-09 Roof K Roof Field Not Asbestos Containing 0422-10 Roof J Roof Field Not Asbestos Containing 0422-11 Roof M Roof Field Not Asbestos Containing 0422-12 Roof K Base Sheet Not Asbestos Containing 0422-13 Roof J Base Sheet Not Asbestos Containing 0422-14 Roof A New Flashing Not Asbestos Containing 0422-15 Roof E New Flashing Not Asbestos Containing 0422-16 Roof K New Flashing Not Asbestos Containing 0422-17 Roof A Old Flashing Not Asbestos Containing 0422-18 Roof E Old Flashing Not Asbestos Containing 0422-19 Roof G Flashing Not Asbestos Containing 0422-20 Roof H Flashing Not Asbestos Containing 0422-21 Roof K Old Flashing Not Asbestos Containing 0422-22 Roof A Tar Not Asbestos Containing 0422-23 Roof E Connector Tar Not Asbestos Containing 0422-24 Roof H Tar Not Asbestos Containing 0422-25 Roof K Tar Not Asbestos Containing

Based on the sample results, none of the materials were identified as asbestos containing. If you have any questions, comments, concerns or would like to discuss this issue further please call me at the office 203-324-2222. Thank you. Regards, James Twitchell Asbestos Inspector #000241 HYGENIX Inc.

SAMPLE LOCATIONS

PLM SAMPLE RESULTS