Project manual Gittings Bladwin Springhouse Exterior Renovations Final.pdf

PROJECT MANUAL

Exterior Repairs to Gittings Baldwin Spring-house Gunpowder Falls State Park

13713 Baldwin Mill Road

Baldwin, MD 21013

Project Number: EC25-09032-75

March 19, 2025

For the State of Maryland Department of Natural Resources

Engineering and Construction Division Josh Kurtz, Department Secretary

State of Maryland Board of Public Works Wes Moore, Governor

Brooke E. Lierman, Comptroller Dereck E. Davis, Treasurer

TABLE OF CONTENTS

I. Detailed Specifications

A. Scope B. Qualifications of the Contractor C. Site Visit D. Use of the Site E. Schedule of Work F. Standards and Codes G. Materials and Supplies H. Method of Work I. Warranty and Guarantee J. General Requirements

II. Drawings and Attachments

Alternates, Unit Prices, and Allowances

I. DETAILED SPECIFICATIONS

A. SCOPE:

1. This project shall consist of the Contractor providing all labor, materials, equipment, tools, insurance, etc., necessary to renovate the interior and exterior of the Gitting’s Baldwin Spring House is located on The Gittings-Baldwin Property in Gunpowder Falls State Park at 13717 Baldwin Mill Road Baldwin, Maryland 21013.

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

Roof Replacement:

a. Remove and properly dispose of approximately 1000 SF of wooden Cedar Shakes, all flashing (Cupola), and drip edge down to bare purlins.

b. Remove and replace approximately 60 LF of 5/4” x 7” fascia boards match the existing. Properly prepare, prime and paint new fascia.

c. Remove and replace approximately 75 SF of copula siding with new lumber matching the existing in terms of thickness dimen-sions and profile. Properly prepare, prime and paint new siding.

d. Install new flashing around the base of the cupola.

e. Install new aluminum drip edge on the entire perimeter of all the roof systems

f. Install approximately 1000 SF of new Red Cedar Shakes/Shingles in a traditional overlap pattern and 27 LF of alternating ridge method.

Siding and Stone Re-pointing:

g. Repoint approximately 2000 Square Feet of stone wall surface on the interior and exterior. Replace all missing, cracked and spalled stone using Unit Price # 1, approximately 20 stones

General:

. h. The Contractor shall clean up the job site to the satisfaction of the DNR Project Managers and Facility Manager. This work shall include raking surrounding areas, and removal of all excess materials and debris.

NOTE: All quantities and sizes listed above are approximate. The Contractor shall be responsible to obtain his/her measurements for the project and bidding purposes.

NOTE: The Contractor shall at the end of each work day, inspect and

“sweep” the area with a magnet, and pick up any nails and/ or debris.

B. QUALIFICATIONS OF THE CONTRACTOR:

1. The Contractor shall be licensed in the State of Maryland as a General Contractor, in accordance with COMAR regulations to perform the roofing work associated with this contract.

2. The Contractor shall have a minimum of 5 years of current and continuous experi-ence performing similar work of installation projects

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

C. SITE VISIT:

1. All prospective bidders are encouraged to attend the Pre-Bid conference meeting and familiarize themselves with all requirements for the project. Failure to attend the Pre-Bid conference meeting will not relieve the successful bidder from com plying with the requirements of these specifications at no additional cost to the

State. No allowances will be made for the contractors past for failure to take into consideration any conditions or circumstances existing at the site which might af fect the work.

2. Any additional site visits can be arranged with the Park facility Manger Luke Ter-rell 410-592-2897.

D. USE OF SITE:

1. Any damage to property, either inside or outside, shall be the responsibility of the Contractor. The contractor shall bear all costs necessary to repair, replace or re-store any property damaged.

2. The Contractor shall assume full responsibility for protection and safekeeping of products stored on premises.

3. The Contractor shall at all times be responsible for the security of Contractor’s facilities and equipment. MPS (Maryland Park Service/DNR( Department of Nat-ural Resources will not take responsibility for missing or damaged equipment, tools, or personal belongings of Contractor or his Subcontractors.

E. SCHEDULE OF WORK:

1. Work shall be scheduled through and approved by the Project Manager and Park.

The Contractor shall perform all work Monday through Friday during the normal working hours of 7:00 AM to 5:00 PM, unless approved by the Project Manager in writing.

2. The Contractor shall notify the Project Manager seven (7) days prior to start of work. The Contractor shall coordinate with the DNR Project Manager and the Park Manager on the dates of the Work Initiation Conference, the work, and any closures required.

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

F. STANDARDS AND CODES:

1. All work shall be performed in a first-class workmanship manner in accordance with the standards of the trade.

2. The Contractor shall comply with OSHA (Occupational Safety and Health Ad-ministration) and MOSHA (Maryland Occupational Safety and Health Admin-istration) regulations regarding construction safety and health standards through-out the duration of this project.

4. All Work shall be performed in accordance with the applicable code requirements in the 2021 Maryland Building Performance Standards (MBPS) consisting of amended versions of the following ICC codes and secondary references:

• International Building Code (IBC)

• International Residential Code (IRC)

• International Energy Conservation Code (IECC)

• 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 (NFPA) Codes referenced in the aforementioned ICC codes.

• Maryland Department of Transportation-State Highway Administration’s

(SHA) “Standards Specifications for Construction and Materials

• The Secretary of the Interior’s Standards for the Treatment of Historic

Properties (36 CFR Part 68, 1995)

G. MATERIALS AND SUPPLIES:

1. General:

a. All materials shall be as specified or approved equal by the Project Man-ager.

b. The Contractor shall be responsible for the coordination, offloading and proper storage of all materials and supplies and assume full responsibility for protection and safekeeping up until the time of the final inspection.

c. Where applicable, materials shall be delivered in their original unopened containers with labels intact and legible.

d. All materials and supplies shall be stored up, off the ground surface and protected from the weather with a waterproof covering.

e. Materials shall be stored in a safe area, out of the way of traffic. Storage site location shall be approved by the Park Facility Manager prior to the storage of any materials on site.

f. Any materials not specifically mentioned but necessary for the safe, pro-fessional, and satisfactory completion of the project shall be pro-vided by the Contractor as specified herein.

g. All colors for all materials shall be selected from using existing colors scheme to match and approved by the facility manager.

2. Specifics

a. Cedar Shakes: shall be Certigrade ½” x 24” Taper Split Premium Red Cedar shakes, #1 Blue Label made from 100% clear and 100% Edge-Grain material. As approved by the Cedar Shake and Shingle Bureau or Timber Products Inspection, Inc. All bundles shall bear the Grade Stamp Label. All shakes shall receive the Centi-last .25 pcf pressure Preservative Treatment by Western Wood Preservers LTD or approved equal

b. Drip edge shall be 16 Ounce Copper 2” x 4” or approved “equal”

c. Apron/ step/cupola flashing shall be 16 Oz copper. Step flashing shall have a minimum width of 4” horizontal & 3” vertical and shall not be exposed from beneath the shakes on the roof section of roof.

Cupola and counter flashing will need to be custom made for appli-cation.

d. Shake nails shall be Stainless Steel Type 304-316 6d approved by the Cedar Shake and Shingle Bureau.

Note: No Staples shall be used for installation.

e. Caulk for sealing flashing where needed shall be Dap Dynaflex 230, color shall match shakes or approved equal.

f. Fascia Board shall be Yellow Pine 1’’x 10’’ No. 1 Dense or ap-proved equal.

g. Mortar Mix:

i. Pre-blended, lime-based mortar suitable for pointing joints in his-toric stone masonry.

ii. Shall contain no Portland cement, acrylic, latex, epoxy, or other synthetic polymer bonding agents or additives.

iii. Specifically formulated for physical compatibility with behavioral characteristics of each masonry unit type and with behavioral char-acteristics of original lime mortar bedding materials.

iv. Formulate mortar colors to replicate appearance of the original lime-clay mix mortar materials, as approved by the Owner and Ar-chitect.

v. Field activation of mortar shall consist of controlled mixture of powder and water only.

vi. Pointing materials shall be capable of single layer build-up without shrinkage and provide strong resistance to deterioration under freeze-thaw and extreme heat conditions.

vii. Mortar shall develop tenacious adhesion to masonry substrate and be formulated to produce weaker compressive strength than ma-sonry units; based on laboratory testing.

viii. Cured mortar shall be more vapor permeable than the core line mortar; more permeable than Portland cement core mortar; and more vapor permeable than sandstone unit masonry.

ix. Mortar shall be frost and salt resistant.

h. Paint System:

i. Paint for the Yellow Pine shall be Sherwin Williams Emerald Exterior Acrylic Latex product # K48W00051 or approved equal.

Sheen shall be satin, and color will match existing color scheme

ii. Primer shall be Sherwin Williams Prep Rite Pro Block, product # B51W00620 or approved equal.

H. 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 within the time limits of the contract. The sequence of events shall be left up to the Contractor.

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

d. The Contractor shall maintain the job site in a safe, neat and orderly manner throughout the entire project and take steps to prevent accumulation of debris at the job site.

e. The Contractor shall take steps to insure a watertight roof throughout the project. The contractor is responsible for any moisture or water inside the building as a result of stormwater intrusion during construction.

f. Upon completion of the project, the Contractor shall legally dispose of all excess materials and debris and leave the entire area clean and in an acceptable condition.

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

2. Specifics:

Roof Replacement:

a. Remove and properly dispose of old roofing materials, felt paper, fascia boards, flashing and associated roofing accessories to expose the underly-ing wood purlins on the spring house consisting of approximately 1,000 Square Feet.

b. The Contractor shall sweep the roof free of debris and properly prepare the roof purlins in accordance with the shingle manufacturer’s instructions to receive a new roofing system.

c. Remove and replace approximately 60 LF fascia boards to match the exist-ing. Properly prepare, prime and paint new fascia.

d. The Contractor shall install new flashing and counter flashing, etc. around all transitions from the new roof shingles to vertical siding or masonry surfaces and the Cupola according to the manufacturer’s instructions

e. Replace all Cupola flashing, approximately 75 SF, according to the manufacturers’ written instructions. Cupola step flashing shall be installed to each course of shingles. Flashing shall be installed with the “V” crimp centered in valley of roof and to be fastened with cleats 12” OC.

W valley metal shall be installed at the ridge of each dormer, where it joins the main roof, it shall overlap the valley metal a minimum of 2”, with a ½” folded back trim and cleated in place, Installed according to the manufacturers’ written instructions.

f. Replace all copula siding with approximately 75 LF of siding boards to match the existing. Properly prepare, prime and paint the new siding.

g. Install approximately 1000 SF of new red cedar shake shingles including approximately 110 LF of starter shingles in accordance with the manufac-turer’s instructions. Starter shingles shall be secured to the roof deck with 1 ¼ stainless steel roofing nails Type 304-316 6d (6 per shingles). All shingles along the eves

NOTE: Roofing staples will not be permitted in place of roofing nails.

Siding and Stone Re-pointing:

h. Carefully remove all loose mortar from surfaces to expose the stone and using an air compressor and chisel methods.

NOTE: The Contractor shall demonstrate to the DNR Project Managers the point finish technique. This demonstration shall be performed on 12 SF of the surface. This mortar shall be allowed to dry for one (1) week to determine that the new mortar matches the color and style of the original mortar. Modify mortar mix as necessary to achieve the appropriate color.

i. Repoint approximately 2000 Square Feet of interior and exterior stone wall surface according to Color and the style should match existing adjacent mortar. Properly re-caulk all windows/doors that transition to masonry surfaces as per the manufacturer’s written instructions.

i. Remove all existing mortar down to a depth required to expose sound, un-weathered mortar from the wall and blow out all joints to remove fine particles and rinse all areas with clean water. Deep joints are to be back pointed (layered). Tarp the areas to catch debris.

ii. Cut out mortar by hand with chisel and resilient mallet or pre-ap-proved Pneumatic chisels. Do not use power operated grinders without the Engineer’s written approval. Handheld power grinders shall only be approved for use when removing hard Portland mortar joints.

iii. If approved in writing by the DNR Project Managers, cut out only the center of the hard Portland mortar joints using an angle grinder with a diamond impregnated metal blade. Remove the re-maining mortar by hand with a chisel and resilient mallet.

iv. The Contractor shall install new mortar between the existing stone on the stone wall, matching the original mortar style. Install the mor-tar in accordance with the manufacturer’s instructions.

v. Joints must be sound and free from dust, dirt, grease, laitance and/or any other coating or foreign substance which may prevent proper adhesion. Remove all mortar down to a depth required to expose sound, un-weathered mortar and blow out all joints to remove fine particles and rinse all areas with clean water.

vi. It is recommended that suitable PPE be used, such as but not limited to safety goggles, gloves, and a dust mask equipped with P-2 filters (or equivalent) be worn for protection.

vii. Pointing mortar shall be a traditional hydraulic lime mix, that is mixed thoroughly, to lessen shrinkage upon drying

a. 1 part Lime Putty and sand, proportioned by volume ac-cording to the results of the Aggregate Void Space Ratio test, with pigments as specified by the manufacturer. Mix as specified in “Mixing” Article

b. Premix: Bedding/Pointing Mortar and Fine Sand Butter Joint Mortar

c. All ingredients shall be measured by volume using pre-established uniform measures. Shovel measuring is not permitted.

d. Mix mortars in an approved vertical-shaft mixer, Imer or equivalent.

e. Begin by adding ½ the sand to a clean, dry mixer. Next, add the putty and the prewetted pigments prescribed in the mortar formula. Lastly, add the remaining sand.

f. When mixing lime putty mortar from putty and sand (not premixed from the factory) - it should be mixed for at least 20 minutes and shall be mixed at least 5 days prior to installation. Place mixed mortar with no air pockets in plastic buckets or plastic barrels with four cups of water covering the top surface (to prevent premature carbona-tion) and lids. Greater workability and better mortar per-formance is achieved with less water added during mix-ing and with longer mixing times.

g. Re-mixing without adding water improves the workabil-ity of lime mortar. Mortar should be knocked-up, drill-mixed with an eggbeater-style mix attachment, or re-mixed in the vertical shaft mixer for at least 3-5 minutes just prior to installation. Mortar that has stood in a pan or bucket for more than an hour should be remixed/knocked up in this way to improve workability. Mortar so re-mixed, when “set” on a trowel, should stick to the trowel when turned upside down. Mortar can be re-worked in-definitely, without adding water, however in hot dry weather a minimum of water can be added as long as the original water content is not increased. Mortar should be replaced into buckets and covered with water when not using.

h. The new mortar should be color matched to the original mortar.

viii. Moisten the joint using clean water. If the surface is allowed to dry out before applying mortar mix, this step must be repeated. This is very important. The mortar should be applied one lift using appro-priate pointing tools. Place the mortar into the joint so that it matches the original joint profile. More water may be required if ambient temperature rises. The mixing may be done by hand, stirring until the mortar is thoroughly mixed. The working time will vary, de-pending upon temperature and humidity. Using excessive water in the mix may affect the color of the repair.

ix. Periodically mist mortar joints using clean water for at least a 72 hour period. The timing for initial water misting will vary with am-bient conditions. Cooler, damp conditions may require waiting sev-eral hours before beginning the curing process. Mist several times a day as necessary. Should access to the repairs be impossible over a period of time, plastic may be used to cover them temporarily. The application of plastic, however, does not remove the need for formal curing techniques. Do not use water or solvents immediately after application to wash off excess mortar.

x. Replace all missing, cracked and objectionably spalled mortar.

Any replacement or fill stone must replicate the existing stone in style color and shape. Unit Price And approximately 20 stones.

NOTE: If the Contractor will encounter unsuitable mortar material beyond 2” deep, notify the DNR Project Manager.

g. Properly dispose of construction debris from the job site and leave it in a pre-construction condition after completion.

h. The Contractor shall clean up the job site to the satisfaction of the DNR Project Managers and Facility Manager. This work shall include sweeping walkways, raking surrounding areas, and removal of all excess materials and debris. Pick up all nails on a daily basis.

i. Any tire ruts, holes, etc., left by the Contractor shall be filled with topsoil and seeded to a pre-construction condition.

NOTE: All quantities and sizes listed above are approximate.

The Contractor shall be responsible to obtain his/her measurements for the project and bidding purposes.

NOTE: The Contractor shall at the end of each work day, inspect and

“sweep” the area with a magnet, and pick up any nails and/ or debris.

I. WARRANTY AND 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 DNR Project Managers all manufactur-ers’ warranties for materials and systems used on this project.

4. Acceptance by the DNR Project Managers of any procedures, materials, work-manship, or final product shall not relieve the Contractor of his contractual requirements.

5. All work is subject to the inspection and approval of the DNR project manager.

J. GENERAL REQUIREMENTS:

1. The Contractor shall make his own arrangements at his own expense, coordinate with the Facility Manager and the DNR project managers, for storage of materials and any construction yard he may require to execute 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. He shall repair all damage caused by his operation 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 make his own arrangements to acquire any temporary utility service which he requires to perform this contract. Any expenses incurred must be paid by the Contractor.

5. The completed project is subject to the inspection and approval of the DNR

Project Managers.

6.. The contract shall be for a period of 90 calendar days.

NOTE: The Contractor shall incorporate all costs associated with transportation fuel, maintenance on equipment, employee salary, benefits, overhead, profit, etc. in the unit price. Unit prices will be used to increase/decrease the contract price based on actual quan-tiles installed, in accordance with the instruction to Bidders for Construction Project (3.B.3)

II. DRAWINGS & ATTACHMENTS

1. The following drawings are included in and shall be considered a part of these specifications:

Drawing # 1 Location Map

Attachment # 2 Cedar Roof and Cupola

Attachment # 3 Stone exterior wall

ALTERNATE, UNIT PRICES, AND ALLOWANCES

A. ALTERNATES: NONE

B. UNIT PRICES: 1. Unit Price # 1, the contractor shall insert an estimated 20 stones of a similar color and style of existing stone = Total Unit Price #1 to replace any missing stones directed by the DNR Project Manager.

C. ALLOWANCES: NONE

i. Remove all existing mortar down to a depth required to expose sound, un-weathered mortar from the wall and blow out all joints to remove fine particles and rinse all areas with clean water. Deep joints are to be back pointed (layered). Tarp the are...