RE-BID DETAILED SPECS- Wolf Den Roof Replacement.pdf

IV. DETAILED SPECIFICATIONS

A. SCOPE:

1. This project consists of the Contractor providing all labor, equipment, materials, supplies, insurance, etc., necessary to install asphalt shingles & rain gutter on operational house at Wolf Den Run State Park. The project is located at 1659 Upperman Rd, Oakland MD, Garrett County, Maryland 21550.

2. The proposed project shall include but is not limited to the following:

a. Remove approximately 1700 SF of asphalt shingles & 50 LF ridge cap.

Remove approximately 250 LF drip edge. Remove & replace approximately 250 LF of aluminum soffit & facia. Remove approximately 85 LF of valley and wall flashing & chimney flashing.

Remove 20 LF of rain gutter.

b. Remove and replace approximately twelve (12) courses of CMU flue block and terracotta liner on East chimney. Remove and replace approximately (26) courses of CMU flue block and terracotta liner on north chimney. Seal all replaced CMU flue block with thuro-seal block sealer or approved equal.

c. Install approximately 1100 SF of asphalt shingles & underlayment, to include approximately 50 LF of ridge vent & asphalt caps.

d. Install approximately 600 SF of G rib metal roofing.

e. Install approximately 250 LF of drip edge & chimney flashing.

f. Install approximately 130 LF of seamless gutter and 100 LF of downspouts.

g. Install approximately 250 LF of soffit & facia.

h. Install Approximately 100 LF of double rail snow guard.

i. Removal and proper disposal of all debris off state property.

NOTE: All quantities listed above as approximate shall be confirmed by the contractor for the purpose of bidding. It shall be the responsibility of the contractor to determine the exact quantities.

3. Unit Pricing :

Unit Price #1: Deteriorated roof sheathing will be removed and replaced under this Unit Price.

B. QUALIFICATIONS OF THE CONTRACTOR:

1. The Contractor shall be licensed in the State of Maryland as a General

Contractor to perform work associated with this project.

2. The Contractor shall have a minimum of three (3) years experience performing construction work of a similar nature.

3. Upon request, the Contractor shall supply to the DNR Project Engineer a list of similar projects, which have been successfully completed by the

Contractor.

C. SITE INSPECTION:

1. It is suggested the Contractor visit the job site and familiarize himself/herself with the conditions under which the work will be performed. No allowance will be made for errors on the Contractor’s part for failure to take into consideration any conditions or circumstances existing at the site which might affect the specified work.

2. Please contact the Facility Manager by calling 301-334-9180 prior to any site visit other than the pre-bid meeting.

D. SCHEDULE OF WORK:

1. Work shall be scheduled through and approved by the Project Engineer and the Facility Manager. The Contractor shall perform all work Monday through

Friday during the normal hours of 8:00 am to 5:00 pm, unless approved by the

Project Engineer in writing.

2. The contractor shall notify the Project Engineer seven (7) days prior to the start of work. Contractor shall coordinate with the Project Engineer and the

Facility Manager the date of preconstruction conference, the work, and any closures required.

3. Use of the premise by the Contractor is to be limited to specified work areas and approved storage areas.

4. All work shall be completed within 180 calendar days of the notice to proceed.

E. STANDARDS AND CODES:

1. The Contractor shall comply with OSHA (Occupational Safety and Health

Administration) and MOSHA (Maryland Occupational Safety and Health

Administration) regulations regarding construction safety and health standards throughout the duration of this project.

2. All work shall be performed in accordance with applicable code requirements and standards as defined by the Maryland Code Administration “Maryland

Building Performance Standards” (MBPS), and the latest editions of the:

- International Building Code (IBC)

- International Residential Code (IRC)

- International Plumbing Code (IPC)

- International Mechanical Code (IMC)

- National Electric Code (NEC)

- International Energy Conservation Code (IECC)

- Maryland Accessibility Code (MAC)

- National Fire Protection Association 101 Life Safety Code (NFPA)

- International Ground Source Heat Pump Association (IGSHPA)

- Maryland Department of Transportation – State Highway Administration

Standard Specifications for Construction Materials

- Standard for chimney, fireplaces, vents, and solid fuel burning appliances

(NFPA 211)

and any local amendments or modifications to the Standards made by the local jurisdiction which may be applicable to the work.

F. MATERIALS AND SUPPLIES:

1. General:

a. All materials shall be as specified or approved equal by the DNR

Project Engineer. In the event the Contractor chooses to substitute materials other than those specified, the Contractor shall submit to the

DNR Project Engineer all pertinent data to determine the or-equal status. This material shall be submitted to the DNR Project Engineer a minimum of ten (10) days prior to the bid opening. The DNR Project

Engineer shall notify the Contractor within five (5) days as to the or-equal status.

b. All materials shall be new and where applicable shall be delivered to the job site with labels intact and legible.

c. The Contractor shall be responsible for the coordination, off-loading and proper storage of all materials and supplies up until the time of the final inspection.

d. Materials shall be stored in a safe area, out of the way of traffic.

Storage site location shall be approved by the Project Engineer prior to the storage of any materials on site. All materials and supplies shall be stored up off of the ground surface and protected from weather with a waterproof covering. Any special storage instruction required by the material manufacturer shall be performed by the Contractor as if specified herein.

e. Any materials that have not been specifically mentioned, but are necessary for the complete, safe and satisfactory completion of the project shall be provided by the Contractor as if specified herein.

2. Specific:

a. CMU block shall be 16”x16”x8” flue block.

b. Terracotta flue liner shall be 8”x8”x24”.

c. CMU flue block shall be capped with a sloped cement-based cast in place cap to create positive drainage.

d. Mortar shall be Type S mortar as manufactured by Brick-loc or approved equal with a mix ratio of 2 sand :1 mortar.

e. Block sealer shall be Thuro-seal cement base sealer white in color or approved equal.

f. Underlayment shall be GAF Weather Watch Leak Barrier or approved equal.

g. Roofing Shingles shall be GAF Timberline HDZ series. Lifetime LTD or approved equal. Color to be selected by samples provided by contractor.

h. Bathroom vent boots shall be Retro master Multi size rubber boot as manufactured by Oatey or approved equal.

i. Vented Ridge shall be GAF Cobra Snow Country Attic Exhaust

Ventilation or approved equal. Cap shingles shall match shingle color

j. Drip edge shall be Berger C 5.5 white in color as approved by shingle manufacturer. Minimum width shall be 5” or approved equal.

k. Flashing: All flashing shall be .019 aluminum. Chimney step and counter flashing will need to be custom made for application white in color.

l. Caulk for sealing flashing where needed shall be Dap Dynaflex 230 or approved equal. Color shall match flashing.

m. Metal roofing shall be G-rib 29 gauge corrugated metal as manufactured by CN metals or approved equal. Color to be selected by samples provided by the contractor.

n. Plywood sheathing shall be CDX (3/4”) , or approved equal. #8 penny galvanized nails or approved deck screws shall be used for the installation of the plywood

o. Snow guards shall be double rail system made of aluminum and designed to be installed on asphalt shingle roof as manufactured by

Alpine Snow Guards model #PP120 Two Pipe Snow Guard or approved equal. Note: guards are to be installed on asphalt shingle roof only.

p. Gutter shall be 6’’ “K style” aluminum .032 minimum gauge seamless, white in color. Hidden hangers to be used for installation.

q. Downspouts shall be 3”x4” aluminum .027 minimum gauge, all elbows, straps, hangers, and screws shall be specifically used for the specified downspouts. White in color.

r. Splash blocks shall be 24” vinyl green in color as manufactured by

Amerimax or approved equal.

s. Facia to be aluminum .019 minimum thickness white in color appropriately sized to completely cover facia and rake board and receive soffit panel facia to be attached with white aluminum common head nails.

t. Soffit and associated trim to be aluminum vented white in color as manufactured by Amerimax or approved equal.

G. METHOD OF WORK:

1. General:

a. All work shall be performed as called for in these written specifications.

b. The Contractor shall coordinate all work with the various trades and suppliers in order to complete the project expeditiously and within the time limits of the contract.

c. All work shall be performed in the best and most professional manner by mechanics skilled in their respective trade.

d. Where applicable, all materials and supplies shall be installed in accordance with the manufacturer’s written instructions as if specified herein.

e. Throughout the project, the Contractor shall schedule and coordinate all work with the Park Manager to minimize disruption to daily operations.

f. The Contractor shall maintain the job site in a safe, neat, and orderly manner throughout the entire project.

g. The Contractor shall provide and maintain tarps for ground cover throughout the duration of the project around the building.

h. The Contractor shall be responsible for the removal and disposal of all debris throughout the duration of the project.

i. Upon completion of the project, the Contractor shall legally dispose of all excess materials, debris, etc., and leave the entire site in a broom swept condition.

j. Any work that has not been specifically mentioned but is reasonably implied and is necessary for the safe and satisfactory completion of the project, shall be performed by the Contractor as if specified herein.

2. Specific: Installation

a. Contractor shall remove existing shingles, felt, drip edge, flashing, nails, etc.… All unsuitable sheathing shall be replaced as unit price #1 as directed by Project Engineer.

b. New plywood shall be properly installed with 8d nails as specified. Re-nail loose sheathing and sweep roof deck, drive in protruding nails.

Plywood sheathing shall be installed so that joints break properly on roof trusses.

NOTE: Building must be left in a dried in condition at the end every workday. There will be no exceptions.

c. Remove deteriorated, cracked, or damaged block and liner to lowest point on each chimney. (approx. 12 courses on east chimney and 26 on north chimney).

d. Clean existing wall sheathing surface, re-nail loose sheathing and protruding nails. Although not anticipated should any deteriorated or unsuitable sheathing be encountered contact the project engineer for direction. Note: All wall sheathing will be replaced under unit price#1.

e. Install #30 felt moisture barrier to wall sheathing then attach brick ties to sheathing every 24” to ensure proper bonding to building. Lay flue block and liner parallel to building plumb and level to extend 16” above the peak of roof.

f. Cap top of flue block with sloped mortar cap.

g. Apply Cement based sealer to all new flue block and cap. Color of sealer to be white.

h. Drip edge shall be installed on all applicable roof lines, eaves, & gables etc.

i. GAF weather watch underlayment shall be installed in valleys roof eves and up rakes of roof & shall be installed per manufacturer specifications.

Field areas shall be underlaid with #30 felt or approved equal.

NOTE: GAF Weather Watch Leak Barrier shall be placed on top of drip edging for proper sealing.

j. On 1st story roofs and porches install specified metal roofing utilizing manufacture supplied Screws, flashing, hangers, closures and trim.

Install metal roofing per manufacture recommendations with all

Fastening intervals, torque specs, flashing intervals, sealant locations, capping requirements, and closure locations.

k. Contractor shall use GAF starter strip shingles under first course of shingles. Shingles shall be installed per manufacturer specifications to keep warranty valid. Starter shingles shall be cut to keep recommended pattern. Recommended nailing pattern shall be used so that nail heads are not exposed. 1 ¼ ‘’ nails shall be used for installation. (Staples shall not be used). Hand nailing & pneumatic nailing will be permitted for installation

l. Vented ridge shall be installed per manufacturer’s specifications.

Start and stop vented ridge 2’ from edge of roof line.

Note: Roof sheathing shall be modified as required to obtain proper ventilation (2” min clearance each side).

m. Ridge cap shingles shall be installed with minimum of 2 ½’’ nails, using hand nailing method only.

n. All existing Chimney step and counter flashing shall be removed and replaced. Step flashing shall be installed on every shingle course.

Flashing shall not be exposed from beneath the shingles. Both sides and bottom of chimney shall have a groove sawn or ground with a masonry blade. Groove shall be ¼ in. width and a minimum of ¾ in. depth. New counter flashing shall be custom bent to fit groove and roof line neatly.

After flashing has been installed in groove, it shall be sealed with a polyurethane caulk, color shall match flashing.

o. Contractor shall install new specified seamless gutter ensuring positive flow to downspout drops. Properly fasten gutter with specified hangers and fittings. All gutter fittings shall be fastened with colored aluminum pop rivets or screws to match gutter. Gutter fittings shall be sealed with premium grade silicon to ensure a watertight installation. Gutter hangers shall be installed 2’ O.C.

p. The contractor shall install new appropriately sized aluminum facia to achieve at least a ¾” minimum overlap of the drip edge over facia.

Facia to be installed so that there are no butt joints on vertical surfaces.

q. The contractor shall install new appropriately sized vented aluminum soffit with manufactures recommended fasteners and application.

r. The contractor shall install new snow rail system on the second story asphalt roof only. The rail shall be installed in a pattern of (2’) two feet from eve of roof fastened and sealed per manufactures recommendations.

s. Install new specified downspouts ensuring positive flow away from building. Properly fasten downspouts, utilizing proper brackets for that application. All downspouts’ fittings shall be fastened with colored aluminum pop rivets or screws.

Note: New downspouts shall be terminated into splash blocks with a positive flow away from house foundation.

3. Specific: Site Cleanup

a. The Contractor shall be responsible to remove all excess materials and debris associated with this project unless otherwise noted in these specifications.

b. All debris generated from this project shall become the property of the

Contractor. The Contractor shall be responsible for the proper removal and disposal of all debris off state property. All fees for said disposal shall be paid for by the Contractor. Rake exterior grounds and use a magnet to remove all nails from the surrounding areas.

H. WARRANTY & GUARANTEE:

1. The Contractor shall fully guarantee the work covered under this contract for a period of two (2) years from the date of acceptance against defects in materials and workmanship.

2. Any defects found within the two (2) year warranty period shall be promptly repaired or replaced by the Contractor at no additional cost to the State.

3. The Contractor shall provide the Project Engineer all manufacturer’s warranties for materials and systems used on this project.

4. Acceptance by the Project Engineer of any procedures, materials, workmanship, or final product shall not relieve the Contractor of his contractual requirements.

5. All work is subject to the inspection and approval of the Project Engineer.

I. GENERAL REQUIREMENTS:

1. The Contractor shall make his own arrangements at his own expense, coordinating with the Facility Manager and the Project Engineer, for storage of materials and any construction yard he may require executing this project.

2. Deviation from the manufacturer's instructions or this specification will not be acceptable.

3. The Contractor shall take all necessary precautions and measures to protect all properties from damage. The Contractor shall repair all damage caused by this project to all public and private property including roads, walks, curbs, utilities, trees, shrubs, plantings, etc., and leave the property in good condition and/or at least equivalent to the condition found.

4. The Contractor shall plan to acquire any temporary utility service which may be required to perform this contract. Any expenses incurred must be paid by the Contractor.

J. METHOD OF BIDDING:

1. All bids shall be submitted online via eMaryland Marketplace Advantage

(eMMA) https://emma.maryland.gov (NO PAPER BIDS!)

2. On eMaryland Marketplace Advantage opposite “Total Bid”, the Contractor shall insert a lump sum bid to complete all work described herein. Bid amount must also coincide on the Bid Form attached and all supporting documents completed to be a full and valid bid.

3. The project will be awarded to the Contractor submitting the lowest Base Bid demonstrating the ability to fulfill the requirement for this project.

4. See Section V “Alternates and Unit Prices” for additional bidding requirements.

https://emma.maryland.gov/

V. UNIT PRICES AND ALTERNATES

A. UNIT PRICES:

1. Sheathing: Unit Price #1: The contractor shall insert a cost per square foot x an estimated 200 SF = Total Unit Price #1 to remove and replace deteriorated/damaged wood roof sheathing.

Unit Prices will be used to increase / decrease the final contract price based on actual quantities installed.

B. ALTERNATES:

None.

VI. DRAWINGS & ATTACHMENTS

1. The following items are attached and should be considered part of these written specifications as if specified herein.

Attachment #1--------------------------------------- Existing Conditions Photograph