Project Number BID NO. CAG 18 2 ROOF REPLACEMENT FOR HARFORD COUNTY PUBLIC SCHOOLS NORTH HARFORD ELEMENTARY. Addendum # 2

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1 Project Number.0 BID NO. CAG ROOF REPLACEMENT FOR HARFO COUNTY PUBLIC SCHOOLS NORTH HARFO ELEMENTARY Addendum # This addendum is to be attached to the North Harford Elementary School Roof Replacement bid drawings dated February, 0. This addendum modifies and becomes part of the contract documents. Work and/or materials not specifically mentioned herein are to be as shown on the drawings and in the general notes. These items in the addendum have no specific order. All contractors are responsible for checking all items. This addendum consists of pages and drawing sheets. The following shall be incorporated into the captioned solicitation as though included in the original documents issued: QUESTIONS AND ANSWERS CLARIFICATION: Bids are due at :00 pm March, 0 as stated in the Specifications. Q. Other than at the top and bottom of all ladders, is there a walk pad layout. A. No, walk pads are only required at the top and bottom of all ladders. Q. Roof details reference wood cants, can perlite or wood fiber cants be used? A. Perlite can be substituted. Q. Are gravel retainers required at drain locations? A. Not required. Q. Detail /A references new prefabricated insulated metal curbs. Where are the new curbs required? A. New prefabricated insulated metal curb reference is for any damaged, deteriorated or curbs that need to be raised to meet the minimum flashing height specification. Q. Please confirm there is no vapor barrier required. A. No, unless the manufacturer requires a vapor barrier to meet the specified warranty. If so then that will be included in this bid and not considered a change order. Q. Section 0000 Part,.E Site Enclosure Fence is staging area required to be fenced in or just tanker locations? A. Required at tanker locations. Staging area not required to be fenced. Q. Section 0 Part,.F Flashing Coating does granule surfaced flashing membrane need to have a reflective coating installed? A. Granule surfaced flashing membrane is not required to have reflective coating unless manufacturer requires it to meet their warranty.

2 Q. Do the two metal deck areas (roofs F & G) have existing structural slope? A. Existing steel is not sloped per the existing building drawings. Q. Is the new base sheet that s specified to be fastened to the lightweight deck need to be a SBS base sheet? Can a typical glass base sheet be used? A. The base sheet is to be as specified in Section 0 Part,.. Q0. Can the lightweight deck be incorporated into the specified R 0 insulation system? If so, what is the average R value of the existing lightweight? A0. Assume an R value of 0 for the existing lightweight deck. Minimum new insulation at the drain to be thick. Q. Roof drawing T core sample information only references insulation thickness on the roof areas F & G. Addendum # Roof Core Summary, does not reference insulation thickness, summary also does not correspond with the associated pictures. If the existing insulation known? A. Roof F is believed to have approximately ½ of insulation with tapered over metal deck. Roof G is believed to have ½ insulation over metal deck. Q. Please confirm that all new ISO insulation to be psi. A. All new ISO insulation to be psi. Q. Do asbestos containing coatings on the previously tested flashings need to be removed by an Asbestos, or can a trained roofing employee perform this work? A. The asbestos containing coatings on the previously tested flashings can be removed by a trained roofing employee pending the following: Training certificates of all employees involved with the removal of the flashings must be provided to HCPS prior to work commencing on the flashings. The flashings must remain non friable. Containment must be per the Specification Section 000. If the flashings become friable, stop work, and notify HCPS. HCPS will contract an Asbestos to remove flashings. DELETE: Drawing D Demolition Roof Plans, dated //; ADD: Drawing D Demolition Roof Plans, Revision, dated //, Addendum. DELETE: Drawing A Roof Plans, dated //; ADD: Drawing A Roof Plans, Revision, dated //, Addendum. DELETE: MBE Part Schedule that was attached to Addendum. ADD: MBE Part Schedule attached in this Addendum. 0// END ADDENDUM #

3 PART MBE PARTICIPATION SCHEDULE ORIGINAL (Page of ) This document must be included with the bid or offer. If the bidder or offeror fails to submit this form with the bid or offer as required, the procurement officer shall deem the bid non-responsive or shall determine that the offer is not reasonably susceptible of being selected for award.. Prime 's Name. Prime 's Address/Telephone Number. Project/School Name. Project/School Location. LEA Name: Harford County Schools PSC Number:. Base Bid Acceptance Alternates Total a. Minority Firm Name: Telephone Number: MDOT Certified Firm 00 0 of established goal OR 00 of one subgroup contract subgoal of 0 b. Minority Firm Name: MDOT Certified Firm 00 0 of established goal OR 00 of one subgroup contract subgoal of Telephone Number: 0

4 PART MBE PARTICIPATION SCHEDULE ORIGINAL (Page of ) This document must be included with the bid or offer. If the bidder or offeror fails to submit this form with the bid or offer as required, the procurement officer shall deem the bid non-responsive or shall determine that the offer is not reasonably susceptible of being selected for award. c. Minority Firm Name: Telephone Number: 0 of established goal OR 00 of one subgroup contract subgoal of MDOT Certified Firm 00 0 d. Minority Firm Name: Telephone Number: 0 of established goal OR of MDOT Certified Firm of one subgroup contract subgoal 0. MBE Total. Total MBE of Entire Contract 0. Form Prepared by:. Reviewed and Accepted by Board of Edu. MBE Liaison Name: Title: Date: Name: Title: Date: Total MBE : Total African-American MBE : Total Asian-American MBE : Total Other MBE :

5 GENERAL CONSTRUCTION NOTES J:\Projects\0.00 HCPS North Harford ES Roof Repl\Design\North Harford Elementary Revision.rvt //0 :00: PM ROOF "H" CANOPY ROOF "H" PLAN A /" = '-0" TYP. ROOF "D" TYP. ROOF "A" ROOF "B" " " ROOFS "A" AND "B" PLAN A /" = '-0". EXISTING ROOF SLOPE /" / '-0". PROVIDE AN ADDITIONAL /" / '-0" SLOPE FOR A TOTAL OF / / FT. ROOF "C" ROOFS "C" AND "D" PLAN A /" = '-0". EXISTING ROOF SLOPE /" / '-0" TYP.. PROVIDE AN ADDITIONAL /" / '-0" SLOPE FOR A TOTAL OF / / FT HIGH ROOF DEMOLITION AND CONSTRUCTION TO BE COMPLETED PRIOR TO ANY WORK COMMENCING ON LOWER ROOFS. CONTRACTOR SHALL COOINATE DAILY WITH THE OWNER TO SHUT DOWN HVAC UNITS DURING ROOF DEMOLITION AND INSTALLATION TO MINIMIZE DUST AND ODORS. PROVIDE RIGID INSULATION CRICKETS AND TAPERED EDGE STRIPS WHERE SHOWN AND REQUIRED TO ACHIEVE SLOPES SHOWN ON PROPOSED TAPERED INSULATION LAYOUT PLANS (SHEETS A & A). SLOPES INDICATE A FINISHED MINIMUM SLOPE TO BE ACHIEVED IN THE FIELD AND DO NOT NECESSARILY INDICATE THE TAPER REQUIRED TO ACHIEVE THAT SLOPE. CONTRACTOR SHALL PROVIDE ALL NECESSARY MECHANICAL, ELECTRICAL, AND STRUCTURAL ITEMS NECESSARY TO EXTEND EXISTING CONNECTIONS THAT ARE MODIFIED DUE TO NEW ROOFING WORK. AT THE END OF THE WORK DAY OR IN THE EVENT OF FORECASTED INCLEMENT WEATHER, PROTECT ROOF OPENINGS AND EXPOSED SUBSTRATE FROM DAMAGE WITH PERMANENT CONSTRUCTION OR TEMPORARY COVERINGS THAT PROVIDE WEATHERTIGHT PROTECTION. ONLY CONTRACTOR CAN QUICKLY AND ADEQUATELY PROTECT WORK PRIOR TO ANY INCLEMENT WEATHER. STAGING, OR TRANSPORTATION OF MATERIALS TO OTHER PARTS OF ROOF UNDER CONSTRUCTION. ALL METAL FLASHING, COPING, ETC. ARE TO BE MANUFACTURED OR FABRICATED IN ACCOANCE TO SMACNA AND NRCA SPECIFICATIONS. CONSTRUCTION KEYED NOTES 0 PROVIDE NEW BALLASTED FOUR-PLY BUILT UP ROOF SYSTEM OVER EXISTING DECK, AND LIGHTWEIGHT CONCRETE. - SEE DTL /A PROVIDE NEW PERIMETER BASE FLASHING AND MTL COUNTER FLASHING/TERM BARS TYP. PROVIDE NEW VENT THROUGH ROOF PIPES, TYP - SEE DTL /A PROVIDE NEW ROOF HATCH. - SEE DTL /A PROVIDE NEW ROOF DRAIN ASSEMBLY - TIE INTO EXISTING PIPING. - SEE DTL /A PROVIDE NEW EXPANSION JOINT COVER. - SEE DTL /A PROVIDE NEW MECHANICAL CURBS. - SEE DTL /A PROVIDE NEW PITCH POCKETS - SEE DTL /A PROVIDE NEW ROOF TOP HVAC SUPPLYS - SEE DTL. /A PROVIDE NEW ROOF TOP HVAC UNITS, ALL SIDES TYP. - SEE DTL /A PROVIDE NEW GRAVEL STOP - SEE DTL /A PROVIDE NEW MTL EDGE OF ALL PERIMETER WALLS - SEE DTL /A PROVIDE NEW GUTTER - SEE DTL /A PROVIDE ROOF DUNNAGE - SEE DTL /A PROVIDE MOD BIT ROOF SYSTEM & INSULATION OVER EXIST. MTL DECK PROVIDE NEW GUTTERS & DOWNSPOUTS AS SHOWN - SEE DTL. 0/A RAISE EXISTING CONDUIT & OUTLETS ABOVE RAISED THRU WALL FLASHING ALONG PERIMETER. ROOF SYMBOLS X #XX ROOF TOP UNIT EXHAUST FAN/ OUTSIDE AIR INTAKE (OAI) HVAC SUPPLY PITCH POCKET ROOF VENT ROOF DRAIN WITH STRAINER CURB & CAP ROOF HATCH ROOF LADDER CORE SAMPLE LOCATION & CORE NUMBER ROOF SLOPE APPROXIMATE SPOT ELEVATION FROM FINISHED FLOOR (REFERENCE ONLY: ACTUAL HEIGHT VARIES DUE TO ROOF SLOPES & GRADES DOWNSPOUT ROOF AREAS ROOF A:, SF ROOF B:,0 SF ROOF C:, SF ROOF D :,0 SF ROOF E :, SF ROOF F: SF ROOF G:, SF KEY PLAN REVISIONS ROOF PLANS DATE: 0/0/ SCALE: AS NOTED DRAWN BY: AJF CHECKED BY: MAS REV# DATE DESCRIPTION 0// ADDENDUM # ARCHITECTS ENGINEERS PLANNERS SURVEYORS HARFO COUNTY PUBLIC SCHOOLS ROOF REPLACEMENT FOR 0 S. HICKORY AVE BEL AIR, MD 0 DRAWING NO: FREDERICK WA ASSOCIATES NORTH HARFO ELEMENTARY SCHOOL FWA JOB NUMBER P.O. Box, South Main Street Bel Air Maryland 0 0 PYLESVILLE, PYLESVILLE MD A 0.00 ISSUE FOR BID

6 GENERAL DEMOLITION NOTES J:\Projects\0.00 HCPS North Harford ES Roof Repl\Design\North Harford Elementary Revision.rvt 0 0 SS ROOF "D" EXISTING EQUIPMENT CATWALK & DUNNAGE TYP. TO REMAIN 0 0 ROOF "A" " " 0 0 ROOF "B" ROOFS "A" AND "B" DEMOLITION PLAN D /" = '-0". EXISTING ROOF SLOPE /" / '-0". DURING TEAR-OFF, TAKE EVERY PRECAUTION NOT TO DAMAGE LIGHTWEIGHT CONCRETE DECK. 0 ROOF "C" EXIST EPDM WRAPPED DUCT WORK TO REMAIN (TYP.). HIGH ROOF DEMOLITION AND CONSTRUCTION TO BE COMPLETED PRIOR TO ANY WORK COMMENCING ON LOWER ROOFS.. CONTRACTOR SHALL COOINATE DAILY W/OWNER TO SHUT DOWN HVAC DURING ROOF DEMOLITION AND INSTALLATION TO MINIMIZE DUST AND ODORS.. DO NOT USE EXISTING ROOFS THAT ARE NOT IN CONTRACT (NIC) FOR ACCESS, STAGING, OR TRANSPORTATION OF MATERIALS TO OTHER PARTS OF ROOF UNDER CONSTRUCTION.. AT THE END OF THE WORK DAY OR IN THE EVENT OF FORECASTED INCLEMENT WEATHER, PROTECT ROOF OPENINGS AND EXPOSED SUBSTRATE FROM DAMAGE W/ PERMANENT CONSTRUCTION OR TEMPORARY COVERINGS THAT PROVIDE WEATHER TIGHT PROTECTION. ONLY REMOVE ROOFING AND ACCESSORIES TO THE EXTENT THAT THE CONTRACTOR CAN QUICKLY AND ADEQUATELY PROTECT WORK PRIOR TO ANY INCLEMENT WEATHER. DEMOLITION KEY NOTES 0 ROOF A:, SF ROOF B:,0 SF ROOF C:, SF ROOF D :,0 SF ROOF E :, SF ROOF F: SF ROOF G:, SF REMOVE GRAVEL, AND PITCH BUR W/ FLOOD; INSPECT AND REPAIR ROOF METAL DECK AS REQUIRED. REMOVE GRAVEL, TAPERED PERLITE, " ISO, AND BUR W/ FLOOD; INSPECT AND REPAIR METAL DECK AS REQUIRED. REMOVE GRAVEL, " PERLITE, AND BUR W/ FLOOD; INSPECT AND REPAIR METAL DECK AS REQUIRED. REMOVE EXISTING GRAVEL EDGE OF ALL PERIMETER WALLS; INSPECT AND REPAIR WD BLOCKING AS REQUIRED. REMOVE EXISTING PERIMETER BASE FLASHING AND MTL COUNTER FLASHING/TERM BARS TYP. REMOVE ROOF DRAIN; PREP FOR NEW REMOVE AND PIPE PENETRATIONS TYP. REMOVE MECHANICAL EQUIPMENT CURBS TYP. REMOVE EXISTING EXPANSION JOINT COVER, INSPECT WD BLOCKING AND MTL DECKING FOR DAMAGE, REPAIR AS REQUIRED. REMOVE EXISTING CONTROL JOINT COMPLETE REMOVE ROOF HATCH; ROOF HATCH TO REMAIN. REMOVE PITCH POCKETS. REMOVE ROOF TOP HVAC SUPPLYS REMOVE EXISTING ROOF CAPS COMPLETE TYP. - PATCH ROOF DECK AS REQ'D REMOVE EXISTING SLEEPERS COMPLETE REMOVE ROOF TOP HVAC UNITS, ALL SIDES TYP. REMOVE EXISTING MTL EDGE OF ALL PERIMETER WALLS; INSPECT AND REPAIR WD BLOCKING AS REQUIRED. REMOVE EXISTING GUTTER RAISE EXISTING CONDUIT & OUTLETS ABOVE RAISED THRU WALL FLASHING ALONG PERIMETER. ROOF AREAS ROOF SYMBOLS X #XX ROOF TOP UNIT EXHAUST FAN/ OUTSIDE AIR INTAKE (OAI) HVAC SUPPLY PITCH POCKET ROOF VENT ROOF DRAIN WITH STRAINER CURB & CAP ROOF HATCH ROOF LADDER CORE SAMPLE LOCATION & CORE NUMBER ROOF SLOPE APPROXIMATE SPOT ELEVATION FROM FINISHED FLOOR (REFERENCE ONLY: ACTUAL HEIGHT VARIES DUE TO ROOF SLOPES & GRADES DOWNSPOUT REVISIONS DEMOLITION ROOF PLANS REV# DATE DESCRIPTION 0// ADDENDUM # ARCHITECTS ENGINEERS PLANNERS SURVEYORS HARFO COUNTY PUBLIC SCHOOLS ROOF REPLACEMENT FOR 0 S. HICKORY AVE BEL AIR, MD 0 FREDERICK WA ASSOCIATES NORTH HARFO ELEMENTARY SCHOOL P.O. Box, South Main Street Bel Air Maryland 0 0 PYLESVILLE, PYLESVILLE MD //0 :0: PM ROOFS "C" AND "D" DEMOLITION PLAN D /" = '-0". EXISTING ROOF SLOPE /" / '-0". DURING TEAR-OFF, TAKE EVERY PRECAUTION NOT TO DAMAGE LIGHTWEIGHT CONCRETE DECK. KEY PLAN DATE: 0/0/ SCALE: AS NOTED DRAWN BY: AJF CHECKED BY: MAS DRAWING NO: D FWA JOB NUMBER 0.00 ISSUE FOR BID