Addendum No. 3 Page 1

ADDENDUM NO. 3

REQUEST FOR PROPOSALS FOR

ROOF REPLACEMENT AND MISCELLANEOUS WORK

AT SELECT FACILITIES

CITY OF ABILENE, TEXAS

CB-2200

October 14, 2021

General

Item No. 1: Proposal due date and time remain as October 19, 2021, at 2:00 p.m. CT.

Item No. 2: Sears Park - Contractor to remove and properly dispose of large satellite dish,

supports, and protection pads on the Sears Park Recreation Center. The City will

remove all connected lines and pipes on the roof associated with the satellite

dish.

Substitution Requests

Item No. 3: Product Substitution Request for Johns Manville

Substitute Johns Manville GlasPly Premier; see attached project data

sheets. Approved.

Substitute DensDeck Prime on all roof areas; see attached project

data sheets. Approved pending manufacturers approval for

product use in specified system.

Substitute JM Flat & Tapered Energy 3® Insulation; see attached

project data sheets. Approved as Noted – Adhere 4’ x 4’ Insulation

Boards, mechanically fastened 4’ x 8’ Insulation Boards.

Substitute JM Dynaweld Cap 180 FR torched; see attached project

data sheets. Rejected and Resubmit. Cap sheet to meet ASTM

6164, Type II, Grade G.

Substitute JM Dynaweld 180 S, torched; see attached project data

sheets. Approved as Noted.

Substitute JM Permaply 28 Lightweight Base Sheet; see attached

project data sheets. Approved.

Substitute JM TPO FB 115; see attached project data sheets.

Approved as Noted.

Substitute JM Ventsulation Felt Base Sheet; see attached project

data sheets. Approved.

10/14/2021

Addendum No. 3 Page 2

Substitute JM Peak Advantage Guarantee; see attached project data

sheets. Approved as Noted. Warranty to include specified Wind

Rider Warranty.

Questions and Answers

Questions are reproduced as received.

Item No. 1: With material shortages, is the schedule going to change or are we not getting

any extra time?

Yes, completion times will be dependent on material availability determined

following award.

Item No. 2: Will hot mopped Modified Bituminous be acceptable instead of torch applied?

Yes, Modified Bituminous products required to meet designated ASTM numbers

listed within specification for SBS Modified Products.

Item No. 3: Project Manual – Section 01 11 00 1.2 A. 3. B. ii. Describes to “Puddle weld new 4-

inch tall Z-purlins to the top of the existing pipe purlins.” For TML 421 – However,

Detail 6/A-001 says “existing purlin to remain.” New Work Keynotes on Roof Plan

A-100 also says existing purlins on each building.

For TML 421, Project Manual – Section 01 11 00, delete Para. 1.2 A. 3. B. ii.

Item No. 4: Will a bid due date extension be considered for 7 days after receiving addendum

with answers to contractor questions?

Proposals are due October 19, 2021 at 2 pm.

Item No. 5: The existing PBR Panel roof systems seem to be in good condition. Will a roof

hugger system be considered over the existing PBR Panels rather than completely

removing existing to replace with standing seam for the alternate on this

package?

Bid as specified.

Item No. 6: Per shingle Manufacturer, the indicated 3-Tab shingles in the specifications do

not qualify for the warranty specified, “25-year Golden Pledge”. Please indicate if

an alternate option is acceptable, if we can meet the warranty requirements.

The 3-tab shingle listed does qualify for the Golden Pledge warranty since it is

being installed as the field. However, the contractor can not apply for the Golden

Pledge Warranty unless he is registered as a Master Elite installer. To qualify for

Addendum No. 3 Page 3

the Golden Pledge Warranty the contractor must use five (5) GAF accessories, this

includes; GAF Asphaltic Shingles, GAF Leak Barrier Products, Cobra Attic

Ventilation Products, GAF Starter Strip, and GAF Ridge Cap, which will be the 3-

tab shingle. Contractors may submit a substitution request from a different

manufacturer meeting all the requirements listed above.

Item No. 7: With questions being sent in still and an addendum not being issued yet, may an

extension of due dates be considered for 7 days after addenda release?

Proposals are due October 19, 2021 at 2 pm.

Item No. 8: Can the requested performance of work for the project (20 days) be extended to

60 days? With the time of year that this project would potentially undergo, there

will be rain days that will factor in and make the requested performance period

an unrealistic time frame for contractors. Submittals and other processes (site-

visit, pre-con meeting, etc.) that will undergo after the NTP is released will also

inhibit the allotted time for construction.

Street Services completion days is extended to 60 calendar days.

Item No. 9: Were any asbestos ACM materials identified to be “positive” in any part of where

the work will take place? If so, please provide a report for contractors to be able

to deliver to subcontractors.

Contractor to notify A/E and City Representative of any suspected area of ACM.

Item No. 10: Is there a specific amount specified of gypsum deck to be repaired on roof area

TML 017 that contractor should include in bid, or will that be incurred by unit

price after Tear off?

Contractor shall include an allowance of 1,000 square feet for gypsum decking for

TML 017 location. Unused allowance will be credited back at unit prices list on

the bid form at project completion.

Item No. 11: Section 01 20 00 under first page of warranty period states for a 20-year warranty

applying to projects 1 & 2. However, project 2 is a R-panel system and no

manufacturer will warrant a water tightness warranty on an exposed fastener

roof. Please advise if this was an oversight and needs to be deleted from this

portion of work or what other avenue should be taken.

Watertightness Warranty only applies to the standing seam metal roofs. All

metal requires the 20-Year Metal Finish Warranty and the Two (2) Year

Contractors Warranty.

Addendum No. 3 Page 4

Item No. 12: What consists of a Certificate of Occupancy as described in Section 01 30 00- 1.6

A? Is there a fee incurred on this certificate? Please advise.

If the facility is unoccupied during construction, Contractor shall obtain Certificate

of Occupancy from the City Building Department prior to Final Completion. The

fee will be waived by the City.

Item No. 13: Does the required construction fence need to be installed around staging area only

as all work is done on the roof? Or will the city need to vacate sections of the

buildings while work occurs there and fence off the entre facility?

Contractor shall install construction fence around laydown yard. Contractor to

follow all OSHA guidelines for warning lines and rooftop safety while on-site.

Contractor to coordinate work at facility with Owner prior to commencement of

work above occupied areas.

Item No. 14: Section 067 52 00-9 and 07 52 00-10 talk about two cap sheets that call out for

the same material. Please advise if the intent is for two cap sheets to be installed

or just one over the base ply?

One cap sheet over the base ply.

Item No. 15: Due to the lead times of how long it will take to receive the required insulation

for the TML 017 roof, may cold adhesives be used for installing the insulation

instead of hot asphalt?

System to remain as specified.

Item No. 16: Please provide a specification for the BUR work portion of roof work as it is non-

existent in original specs.

Addendum 2 contains the specification for the BUR work.

Item No. 17: With the added insulation that will be incorporated into the new roof system

overlay, will the contractor need to provide new prefabricated curbs for all MEP

equipment? Will a curb extension be allowed that does not create a transition

point and still keeps all flashing in a fluent vertical surface?

All flashing to be a minimum eight-inches (8”) above finished roof surface. Curb

adapters permitted or extension of the wood curbs. All associated interior

ducting to be extended.

Addendum No. 3 Page 5

Item No. 18: There are two units that exist on roof section “C” on the project drawings that are

connected to ductwork going into the wall of the gym. The existing units’

blueprint does not match up with the curbs they are partly resting on. Please

advise what the intent is here for raising those units. If a new curb that matches

the blueprint of the unit is to be installed, please state in amendment.

Ductwork will be required to be raised. Provide minimum eight-inch (8”) curb

height for flashing. New curb will be required at this location.

Item No. 19: Are there any parts of, or full MEP equipment that is to be replaced on this

project?

Only what is listed in the project documents.

End of Addendum No. 3.

ATTACHMENT #1