3-Specifications.pdf

SPECIFICATIONS

EAST MARTELLO HISTORIC

MASONRY RESTORATION

PREPARED FOR

MONROE COUNTY BOARD OF COUNTY

COMMISSIONERS

JAN 2026

PREPARED BY:

410 ANGELA STREET

KEY WEST, FL 33040

305/ 296-1347 PHONE

Info@benderarchitects.com EMAIL mailto:Info@benderarchitects.com

EAST MARTELLO HISTORIC MASONRY RESTORATION

TABLE OF CONTENTS 00005-1

TABLE OF CONTENTS

GENERAL SPECIFICATIONS

DIVISION 1 - GENERAL REQUIREMENTS

01010 Summary of Work List of Qualified Bidders

TECHNICAL SPECIFICATIONS

DIVISION 2 - SITE WORK

02070 Selective Demolition 02110 Clearing

DIVISION 3 - CONCRETE

(Not Used)

DIVISION 4 – MASONRY

04210 Historic Masonry, Including New Brick 04500 Masonry Restoration & Cleaning

DIVISION 5 – METALS

(Not Used)

DIVISION 6 - WOOD AND PLASTICS

(not used)

DIVISION 7 - THERMAL AND MOISTURE PROTECTION

(Not Used)

DIVISION 8 - DOORS AND WINDOWS

(Not Used)

DIVISION 9 – FINISHES

(Not Used)

DIVISION 10 – SPECIALTIES

(Not Used)

DIVISION 11 - EQUIPMENT

TABLE OF CONTENTS 00005-2

DIVISION 12 - FURNISHINGS

(Not Used)

DIVISION 13 - SPECIAL CONSTRUCTION

(Not Used)

DIVISION 14 - CONVEYING SYSTEMS

(Not Used)

DIVISION 15 - MECHANICAL

(Not Used)

DIVISION 16 - ELECTRICAL

END TABLE OF CONTENTS

SUMMARY OF WORK 01010-1

SECTION 01010

SUMMARY OF WORK

PART 1 - GENERAL

1.1 PROJECT DESCRIPTION

A. Project consists of structural stabilization of the historic masonry at the East Martello Tower. The East Martello Tower is a National Register historic site. All work activities must be undertaken with sufficient care to protect this historic resource and must be supervised by personnel who are familiar with the Secretary of Interior’s Standards for Rehabilitation and have been pre-qualified under General Specifications, Section I, Bidding Conditions; Section II, Contractual Conditions; and Section III, Forms.

B. The work will include, but not necessarily be limited to, the following items:

1. Restoration of historic brick and mortar dating from 1845 to 1862 using a lime-based mortar.

1.2 INTENT OF THE SPECIFICATIONS

A. The intent of these specifications is to describe the materials and methods of construction required for the performance of the work. In general, it is intended that the drawings shall delineate the detailed extent of the work. Drawings, specifications, and contract documents are complimentary, and what is required by one shall be as binding as if required by all.

1.3 PROTECTION

A. The Contractor shall use every available precaution to provide for the safety of property owner, visitors to the site, and all connected with the work under the Contract.

SUMMARY OF WORK 01010-2

B. All existing facilities both above and below ground shall be protected and maintained free of damage. Existing facilities shall remain operating during the period of construction unless otherwise permitted. All access roadways must remain open to traffic unless otherwise permitted.

C. Barricades shall be erected to fence off all construction areas from operations personnel.

D. All activities which have the potential to disturb subsoils or otherwise disturb archaeological resources, shall be monitored by the Owner=s archaeologist.

PART 2 - PRODUCTS (Not applicable).

PART 3 - EXECUTION (Not applicable).

END OF SECTION

LIST OF QUALIFIED BIDDERS

The following is a list of pre-qualified potential bidders for masonry repointing work on the East Martello project. The Contractors are listed in no particular order. Other Contractors may bid, but they are subject to review of their qualifications and experience with historic masonry projects as stated in Section 04210.

Innovative Masonry Restoration, LLC 16264 Lakeside Ave SE Prior Lake, MN 55372 Phone: 612-548-5589

Contracting Specialists Inc. - South East 1600 North Powerline Road Pompano Beach, FL 33069 954-786-3223 (954-786-3228 fax) William Frigon 617-803-7357 wfrigon@contractingspecialists.com

Stone and Lime Inc.

kuracius@stoneandlime.com 866-294-0462 Ken Uracius

Cenaxo, LLC Architectural Restoration and Coatings Michael Gnazzo, President office@cenaxo.com 860-477-1400 mailto:wfrigon@contractingspecialists.com

SELECTIVE DEMOLITION 02070-1

SECTION 02070

SELECTIVE DEMOLITION

1.1 DESCRIPTION

A. Work included: Carefully demolish and remove from the site those items scheduled to be so demolished and removed.

B. Related work:

1. The Work of this Section must comply with all other Sections of these Specifications.

2. Division 1, General Conditions.

1.2 QUALITY ASSURANCE

A. The work of this project involves a significant historic site. The East Martello is a National Historic Landmark. All work activities must be undertaken with sufficient care to protect this historic resource and must be supervised by personnel who are familiar with the Secretary of Interior’s Standards for Rehabilitation.

B. Use adequate numbers of skilled workmen who are thoroughly trained and experienced in the necessary crafts and who are completely familiar with the specified requirements and the methods needed for proper performance of the work of this Section.

C. All activities which have the potential to disturb subsoils or otherwise disturb archaeological resources, shall be monitored by the Owner’s archaeologist.

Notify the Owner at least 72 hours in advance of such activities.

1.3 PRODUCT HANDLING

A. Comply with pertinent provisions of Division 1.

PART 2 - PRODUCTS

(No products are required in this Section)

SELECTIVE DEMOLITION 02070-2

PART 3 - EXECUTION

3.1 SURFACE CONDITIONS

A. Examine the areas and conditions under which work of this Section will be performed. Correct conditions detrimental to timely and proper completion of the Work. Do not proceed until unsatisfactory conditions are corrected.

3.2 DEMOLITION

A. By careful study of the Contract Documents, determine the location and extent of selective demolition to be performed.

B. In company with the Architect/Engineer, visit the site and verify the extent and location of selective demolition required.

1. Carefully identify limits of selective demolition.

2. Mark interface surfaces as required to enable workmen also to identify items to be removed and items to be left in place intact.

3. Existing historic brick masonry walls to be deconstructed shall be carefully taken apart. See drawings. Mortar shall be cleaned off the bricks using the gentlest means necessary, and the bricks shall be reused.

C. Prepare and follow an organized plan for demolition and removal of items.

1. Shut off, cap, and otherwise protect existing public utility lines in accordance with the requirements of the public agency or utility having jurisdiction.

2. Completely remove items scheduled to be so demolished and removed, leaving surfaces clean, solid, and ready to receive new materials specified elsewhere.

3. In all activities, comply with pertinent regulations of governmental agencies having jurisdiction.

D. Except for Owner requested material and artifacts, demolished material shall be considered to be property of the Contractor and shall be completely removed from the job site.

E. Use means necessary to prevent dust becoming a nuisance to the public, to

SELECTIVE DEMOLITION 02070-3

neighbors, and to other work being performed on or near the site.

F. Use protective measures as necessary to protect all materials to remain.

3.3 REPLACEMENTS

A. In the event of demolition of items not so scheduled to be demolished, promptly replace such items to the approval of the Architect/Engineer and in accordance with the contract documents.

CLEARING 02110-1

SECTION 02110

CLEARING

A. Work included: Clear and grub the site as shown on the Drawings and specified herein. Clear only the landscape required to perform the specified work on the historic masonry walls.

1. Documents affecting work of this Section include, but are not necessarily limited to, General Conditions and Supplementary Conditions in Division 0, and Sections in Division 1 of these Specifications.

A. The work of this project involves a significant historic site. All work activities must be undertaken with sufficient care to protect this historic resource and must be supervised by personnel who are familiar with the Secretary of Interior’s Standards for Rehabilitation.

specified requirements and the methods needed for proper performance of the work of this Section. The Architect reserves the right to remove individual workmen from specific activities or from the project entirely, if in his judgement they are not qualified for activities involving historic fabric or have caused damage to historic fabric.

archaeological resources, shall be monitored by the Owner’s archaeologist. Notify the Owner at least 72 hours in advance of such activities.

CLEARING 02110-2

D. All clearing excavation and subsoil site work shall be monitored by the Owner’s Archaeologist. Schedule all work so that the Owner’s Archaeologist will be on site and present during all operations which may involve disturbance of subsoils.

2.1 MATERIALS

A. Provide materials, not specifically described but required for proper completion of the work of this Section, as selected by the Contractor subject to the approval of the Architect.

A. Examine the areas and conditions under which work of this Section will be performed. Correct conditions detrimental to timely and proper completion of the Work. Do not proceed until unsatisfactory conditions are corrected.

3.2 PROTECTION

A. Protect existing utilities indicated or made known.

B. Protect trees and shrubs, where indicated to remain, by providing a fence around the tree or shrub of sufficient distance away and of sufficient height so trees and shrubs will not be damaged in any way as part of this Work.

C. Protection of persons and property:

1. Barricade open depressions and holes occurring as part of this Work, and post warning lights on property adjacent to or with public access.

2. Operate warning lights during hours from dusk to dawn each day and as otherwise required.

3. Protect structures, utilities, sidewalks, pavements, and other facilities from damage caused by settlement, lateral movement, undermining, washout, and other hazards created by operations under this Section.

CLEARING 02110-3

D. Use means necessary to prevent dust becoming a nuisance to the public, to neighbors, and to other work being performed on or near the site.

E. Maintain access to the site at all times.

F. Co-ordinate all protective operations with the Owner’s Archaeologist. Comply with any requests or directives from the Archaeologist to ensure protection of archaeological resources.

3.3 CLEARING

A. Clean out roots 1" in diameter and larger to a depth of at least 12" below the existing ground surface or subgrade of new graded surface, whichever is lower.

Treat roots remaining in the soil with a weed killer approved by the Architect.

Co-ordinate all clearing operations with the Archaeologist. Do not perform any clearing operations unless the Archaeologist is present.

3.4 CONSERVATION OF TOPSOIL

A. After the area has been cleared of vegetation, strip the existing topsoil to the depth necessary to provide at least 6" depth of topsoil in areas shown on the Drawings to be turfed or planted, and to fill planters, without contamination with subsoils.

B. Stockpile in an area clear of new construction.

C. Maintain the stockpile in a manner which will not obstruct the natural flow of drainage.

1. Maintain stockpile free from debris and trash.

2. Keep the topsoil damp to prevent dust and drying out.

WEST MARTELLO CITADEL HURRICANE REPAIRS

CLEARING 02110-4

3.5 DISPOSAL

A. General:

1. Remove brush, grass, roots, trash, and other material from clearing operations.

2. Dispose of away from the site in a legal manner.

3. Do not store or permit debris to accumulate on the job site.

Do not remove any debris from the site without approval of the Archaeologist.

B. Do not burn debris at the site.

3.6 UTILITIES

A. Coordinate with utility companies and agencies as required.

B. Where utility cutting, capping, or plugging is required, perform such work in accordance with requirements of the utility company or governmental agency having jurisdiction.

HISTORIC MASONRY 04210-1

SECTION 04210

HISTORIC MASONRY

(Including new brick masonry)

A. Work included: Provide brick masonry and mortar where shown on the Drawings, as specified herein, and as needed for a complete and proper installation.

B. Related work:

1. The Work of this Section must comply with all other Sections of these

Specifications.

2. Section 04500, Masonry Restoration and Cleaning of these Specifications.

A. The work of this project involves a significant historic site. The East Martello is listed on the National Register of Historic Places, and is a part of the Fort Taylor system and was constructed concurrently with Fort Taylor. All work activities must be undertaken with sufficient care to protect this historic resource and must be supervised by personnel who are familiar with the Secretary of Interior’s Standards for Rehabilitation.

specified requirements and the methods needed for proper performance of the work of this Section. Brick masons and craftsmen who install brick, granite and mortar, including repointing, will be required to provide evidence of qualifications.

Comply with submittal requirements in 1.3, Submittals, of this Section.

E. Design basis for mortar: Traditional mortar was made from lime putty, or slaked lime, combined with local sand, generally in a ratio of 1 part lime putty to 3 parts

HISTORIC MASONRY 04210-2

sand by volume. Often other ingredients, such as crushed marine shells (another source of lime), brick dust, clay, natural cements, pigments, and even animal hair were also added to mortar, but the basic formulation for lime putty and sand mortar remained unchanged for centuries until the advent of Portland cement or its forerunner, Roman cement, a natural, hydraulic cement. The mortar found in masonry structures built between 1873 and 1930 can range from pure lime and sand mixes to a wide variety of lime, Portland cement, and sand combinations.

The following mortar mix has been used with success in past brick restoration work at other parts of the West Martello.

US heritage NHL 3.5 Natural Hydraulic Lime Mortar, color code USHG # 19-124-3

Use of this exact mortar mix is not required. Contractor is free to propose an alternate mix if desired, but testing of any new proposed mortar for hardness will be required, and all new proposed material will be subject to architect approval. If this mix is used, pigments must be added to make an exact color match with the adjacent historic mortars. Cutsheets for this product are found on sheet A8 of the drawings.

1.3 SUBMITTALS

A. Comply with pertinent provisions of Division 1, General Conditions.

B. Submit qualifications, resumes and experience on similar projects, along with project profiles. Documentation shall include, but not be limited to:

1. Resumes of academic training and employment in the applicable field;

2. Evidence of possession of required licenses and/or business permits; and

3. Evidence of at least three years in the aggregate of on the job experience in historic preservation projects of a similar nature.

In addition to the documentation required above, provide a minimum of 3 references, one of which is an Owner of a completed project of the Subcontractor and one of which is an Architect or Engineer for a completed project. Provide any additional information, including photographs, as applicable, in order to show historic preservation experience.

HISTORIC MASONRY 04210-3

For individual craftsmen, 3 references from past employers will be required. The Architect, under this provision, may waive other requirements of this Specification Section.

C. Product data:

1. Materials list of items proposed to be provided under this Section;

2. Manufacturer's specifications and other data and samples needed to prove compliance with the specified requirements.

D. Mock-ups:

1. At an area on the site where approved by the Architect, provide mock-up masonry panels.

a. Provide one mock-up panel for each combination of brick, bond pattern, mortar color, and joint type used in the Work.

b. The mock-up panels may be part of the Work, and may be incorporated into the finished Work when so approved in advance by the Architect.

c. Revise as necessary to secure the Architect's approval.

E. Schedule of Repairs

1.4 PRODUCT HANDLING

A. Comply with pertinent provisions of Division 1, General Conditions.

B. Products and methods listed in these specifications are subject to use at specific locations. The intent is to ensure the use of compatible materials, i.e.

exactly matching historic fabric with existing historic materials, or by fabricating new materials that match historic materials as closely as possible.

Use historic materials first and move to compatible new materials as existing stock is depleted.

2.1 BRICK, GRANITE AND MISCELLANEOUS STONEWORK

A. Acceptable manufacturers and products:

HISTORIC MASONRY 04210-4

1. Used brick of similar size, color, consistency and strength as existing (obtained from off-site source), historic brick to be removed from the building for re-use. Sections of the existing brick wall will require partial removal of brick and stone to facilitate stabilization of the wall. Clean old mortar from removed masonry and reinstall the components in the work.

2. New brick of equal characteristics to existing when sufficient historic brick is not available. Provide compression test results of at least three

(3) bricks to verify strength requirements. If no test results exist, Contractor shall engage a testing agency to perform the tests. Contractor shall pay for all testing. Provide samples of the proposed brick for color matching.

In past brick restoration and repointing projects at the West Martello, brick from the Stiles and Hart Co. has been used with success. Colors include, but are not limited to:

Stiles and Hart light full range waterstruck Stiles and Hart charcoal waterstruck.

Use of this exact brick is not required. Contractor is free to propose an alternate brick manufacturer if desired, but all new proposed material will be subject to architect approval.

The historic brick masonry wall has a blend of several brick colors. Each of these colors shall be matched with any replacement brick. No less than four brick colors shall be used. Blend the brick so that the color variation matches the historic brick. Patched areas should not be visible.

Where historic brick changes color, use the appropriate brick color to match changes.

A section of historic brick masonry wall has sheared off and must be reconstructed. Contractor shall deconstruct wall and make all efforts to reuse this brick. Wall shall be dismantled and brick shall be cleaned of mortar and reused.

Match size of historic brick exactly.

HISTORIC MASONRY 04210-5

All proposed brick and mortar shall be subject to architect approval.

3. Other stone elements, such as granite or slate, to match existing.

2.2 OTHER MATERIALS

A. Aggregate:

1. Sand for mortar: Fine, sharp, natural sand. Comply with ASTM C144.

B. Lime:

1. Hydrated lime: Comply with ASTM C207, type "S."

2. Lime Putty: Comply with ASTM C5.

C. Water: Provide potable water free from injurious amounts of acids, alkalis, oil, and organic matter.

D. Coloring pigment: Provide pure, ground mineral oxides, non-fading and alkali proof. Coloring pigments will only be used if mortar mixes do not match historic mortars.

2.3 GRANITE AND STONE REPAIRS

A. None.

2.4 MORTAR AND GROUT MIXES

A. Mortar for repointing or setting historic masonry: (Mortar must comply with

ASTM C270)

1. The following mortar mix has been used with success in past brick restoration work at other parts of the West Martello.

US heritage NHL 3.5 Natural Hydraulic Lime Mortar, color code USHG #

19-124-3

Use of this exact mortar mix is not required. Contractor is free to propose an alternate mix if desired, but testing of any new proposed mortar for hardness will be required, and all new proposed material will be subject

HISTORIC MASONRY 04210-6

to architect approval. All testing shall be paid for by the Contractor. If this mix is used, pigments must be added to make an exact color match with the adjacent historic mortars. Cutsheets for this product are found on sheet A8 of the drawings.

2. The mortar mix is based on historic documents and research. A technical analysis was performed on the historic mortar mix at the East Martello, which is a sister fort to the West Martello, constructed at the same time.

The full report of the test results are included at the front of this technical specification.

3. Measure the ingredients accurately and proportion by volume.

4. Mix in an approved, mechanically operated mortar mixer for at least three minutes after all ingredients are in the drum, and at least long enough to make a thorough, complete intimate mix of the materials.

5. Discard mortar which is unused 1 hour following the initial mixing.

6. Provide a test batch of mortar with one set of test cubes, prior to use of the subject mix in the project.

B. Admixtures: No admixtures will be allowed.

C. Testing: Provide a 2’ x 2’ on site test panel for mortar color and installation matching.

A. Examine the areas and conditions under which work of this Section will be performed. Correct conditions detrimental to timely and proper completion of the Work. Do no proceed until unsatisfactory conditions are corrected and specifically approved by the Architect/Engineer.

3.2 INSTALLATION

A. Wetting of bricks:

1. When being laid, provide brick suction sufficient to hold the mortar and to absorb water from the mortar and grout.

2. Provide brick sufficiently damp so that mortar will remain plastic enough

HISTORIC MASONRY 04210-7

to permit the brick to be leveled and plumbed immediately after being laid without destroying the bond.

B. Laying:

1. Unless otherwise indicated on the Drawings, lay the brick to follow the lines, slopes and contours of the existing work to be matched.

2. Use line blocks whenever possible. When it is absolutely necessary to use a line pin, fill the hole immediately after the pin is withdrawn.

3. Use only bricks that are clean and free from dust and other foreign matter.

4. Lay bond patterns to match the existing adjacent construction unless otherwise shown on the Drawings. Match existing bond for color and pattern at repairs.

5. Bed joints:

a. Bevel all bed joints, sloping toward the center of the wall in such a manner that the bed joints will be filled when the brick is finally brought to line.

b. Do not furrow the bed joints.

c. Match all existing bed joints.

6. Where bricks are moved or shifted, remove and lay again in fresh mortar.

7. Immediately remove mortar and grout from areas where they are not scheduled to be placed.

3.3 JOINERY

1. Cut out and repoint defective joints where necessary to a minimum of one inch (1").

2. On all joints exposed to the weather, tool and make smooth, solid, and watertight. Match existing construction at areas of repair.

3. Use of grinders or other power tools for cutting out of historic mortar joints is strictly prohibited. Preparation of joints in historic masonry shall be accomplished using hand tools only.

a. The Repointing Process The difference between a good and a poor repointing job is not always obvious to the unpracticed eye. Merely brushing away the loose mortar and filling the joint will produce a repointing job that may look good for several months, but within a few years the mortar will pop out of the joints. Good preparation of the joint

HISTORIC MASONRY 04210-8

takes a fair amount of work but is essential to getting a repointing job to last the 50 to 100 years that it should. It is during preparation for repointing that the masonry runs the greatest risk of permanent damage; cleaning out the joint should be done only by experienced workers using hand tools under the close supervision of an experienced mason.

Preparing the Joint: All loose, crumbling, powdery, excessively soft, badly stained or cracked mortar should be raked (cut out) to a uniform minimum depth and the full width of the joint, preferably using hand rather than power tools.

Raking: To ensure an adequate bond, the joint should be raked to a depth equal to between 2 and 2½ times the width of the vertical joint (usually ½ to ¾ inch deep with brick and 1 to 2 inches with wider stone joints.) Proper depth ensures that there will be enough surface contact between the mortar and masonry so that surface adhesion and friction will create a good bond without the use of special bonding agents. Any loose and deteriorated mortar beyond this minimum depth should also be taken out. Mortar should be removed cleanly from the masonry, leaving square corners and a flat surface at the back of the cut.

Before filling joints, any bricks or stones that are loose should be reset. Any pieces of brick that chipped off while chiseling out the old mortar can be glued back with ceramic glue; stone can be reattached with epoxy. The joints should be finally cleaned out by gently flushing with water to remove all loose particles and dust.

At the time of filling, the joints should be damp to prevent the too-rapid absorption of water from the new mortar, but no standing water should be present.

Hand versus Power Tools: The best way to remove old mortar is by hand using a small-headed chisel, no wider than half the width of the joint. Although handwork is more time consuming than using power tools, it presents far less risk of permanently damaging the brick or stone. If mortar can be removed only with power tools, it probably should not be removed in the first place.

HISTORIC MASONRY 04210-9

For the most part, power tools such as circular saws with carbide blades or pneumatic impact hammers almost always damage the edges of the masonry units and overcut the ends of joints (especially the vertical joints in a brick wall). Damage to the brick or stone not only affects its visual character, but can also lead to accelerated weather damage.

4. Provide samples of each type of joint.

B. Joint pattern:

1. All joints shall match the existing adjacent construction.

3.4 REPAIR OF HISTORIC MASONRY

A. Schedule of repairs:

1. Inspect all exterior surfaces to determine and verify the extent of historic masonry repair and replacement required.

2. Prepare a schedule, for each exterior elevation and on a room by room basis, describing the areas requiring repointing, repair, reattachment or replacement. Address each type of historic masonry material, including brick, stone, granite and slate. Review the schedule with the Architect and modify as required, securing the approval of the Architect prior to commencing any work of this Section.

B. Repair methods:

1. Type A: Repointing only, matching historic mortar and joint profiles exactly.

2. Type B: Removal of brick with surface deterioration; cleaning and re-installing with the sound face exposed.

3. Type C: Installation of new or historic replacement brick where historic brick is missing, broken, or too severely deteriorated for re-use.

4. Type D: Removal of brick arches, or other structural elements, and reconstruction with the same brick.

Contractor shall submit unit price for each repair, for use in adding or subtracting work from the job.

3.5 POINTING AND CLEANING

A. At the completion of this portion of the Work, Architect will visually inspect the

HISTORIC MASONRY 04210-10

work of this Section and require pointing or cutting out, and repointing if necessary, all holes and defective joints at existing, as well as new mortar joints.

B. Thoroughly clean all masonry surfaces to be left exposed in the finished Work, removing all traces of mortar, grout, and foreign matter.

LIST OF QUALIFIED BIDDERS

The following is a list of pre-qualified potential bidders for masonry repointing work on the West Martello Citadel Hurricane Repair project. Other Contractors may bid, but they are subject to review of their qualifications and experience with historic masonry projects as stated in Section 04210.

Specialized Property Services, Inc.

9605 US Highway 92 East, Tampa, FL 33610 800-446-4274

Contracting Specialists Inc. - South East 1600 North Powerline Road Pompano Beach, FL 33069 954-786-3223 (954-786-3228 fax) William Frigon 617-803-7357 wfrigon@contractingspecialists.com

Stone and Lime Inc.

kuracius@stoneandlime.com 866-294-0462 Ken Uracius

Cenaxo, LLC Architectural Restoration and Coatings Michael Gnazzo, President office@cenaxo.com 860-477-1400 mailto:wfrigon@contractingspecialists.com

HISTORIC MASONRY 04210-11

Innovative Masonry Restoration, LLC 16264 Lakeside Ave SE Prior Lake, MN 55372 Phone: 612-548-5589

MASONRY RESTORATION AND CLEANING 04500-1

SECTION 04500

MASONRY RESTORATION AND CLEANING

(Includes Defoliation and Efflorescence)

A. Work included: Clean and restore the exterior surfaces, as specified herein, and as needed for a complete and proper installation.

1. The Work of this Section must comply with all other Sections of these Specifications.

C. Definitions:

1. "Clean" and/or "restore" as used herein, means removal of paint materials including primers, emulsions, epoxy, enamels, and other applied materials on existing brick and removal of plant growth and efflorescence from brick surfaces.

A. The work of this project involves a significant historic site. The East Martello is a National Register historic site. All work activities must be undertaken with sufficient care to protect this historic resource and must be supervised by personnel who are familiar with the Secretary of Interior’s Standards for Rehabilitation.

specified requirements and the methods needed for proper performance of the work of this Section. Brick masons and craftsmen who install brick, granite and mortar, including repointing, will be required to provide evidence of qualifications.

Comply with submittal requirements in 1.3, Submittals, of this Section.

MASONRY RESTORATION AND CLEANING 04500-2

D. Chemical products coordination:

1. Provide products which are compatible with the surface to be cleaned and subsequent chemicals.

2. Review other Sections of these Specifications as required, assuring compatibility of the total coating system for the various substrata.

3. Furnish information on the characteristics of the specific materials to assure that compatible products and systems are used.

4. Notify the Architect in writing of anticipated problems in using the specified systems.

1.3 SUBMITTALS

A. Comply with pertinent provisions of Division 1 and General Conditions.

B. Product data:

1. Materials list of items proposed to be provided under this Section;

2. Manufacturer's specifications and other data needed to prove compliance with the specified requirements.

3. Manufacturer’s recommended application procedures.

C. Documentation shall include, but not be limited to:

1. Resumes of academic training and employment in the applicable field;

2. Evidence of possession of required licenses and/or business permits; and

3. Evidence of at least three years in the aggregate of on the job experience in historic preservation projects of a similar nature.

In addition to the documentation required above, provide a minimum of 3 references, one of which is an Owner of a completed project of the Subcontractor and one of which is an Architect or Engineer for a completed project. Provide any additional information, including photographs, as applicable, in order to show historic preservation experience.

For individual craftsmen, 3 references from past employers will be required. The Architect, under this provision, may waive other requirements of this Specification Section.

D. Provide a schedule of repairs identifying all locations and products proposed to the Architect. Review the schedule on site with the Architect and modify as required.

MASONRY RESTORATION AND CLEANING 04500-3

1.4 PRODUCT HANDLING

A. Comply with pertinent provisions of Division 1 and General Conditions.

2.1 MATERIALS

A. Acceptable materials:

1. Acidic Cleaner: Manufacturer's standard strength acidic masonry restoration cleaner composed of hydrofluoric acid blended with other acids including trace of phosphoric acid (but no hydrochloric acid) and combined with special wetting systems and inhibitors.

a. Products: Provide one of the following or equal approved by

Architect:

"Sure Klean Restoration Cleaner", ProSoCo, Inc.

"Diedrich 101 Masonry Restorer", Diedrich Chemicals

2. Chemical Paint Remover: Manufacturer's standard thixotropic/alkaline formulation for removing paint coatings from masonry.

"Sure Klean Heavy-Duty Paint Stripper"; ProSoCo, Inc.

"Diedrich 505/606/606X Paint Remover"; Diedrich Chemicals.

3. Liquid Strippable Masking Agent: Manufacturer's standard liquid, film forming, strippable masking material for protecting glass metal and polished stone surfaces from damaging effect of acidic and alkaline masonry cleaners.

"Sure Klean Acid Stop"; ProSoCo, Inc.

MASONRY RESTORATION AND CLEANING 04500-4

"Diedrich Acid Guard"; Diedrich Chemicals.

4. Defoliant: Manufacturer's standard strength vegetation killer containing prometon

a. Products: Provide one of the following or equal approved by

Architect:

"Triox" vegetation killer, Chevron Chemical Company "Roundup" or approved equal

5. Efflorescence Removal: Manufacturer's standard poultice cleaner containing soda ash, talc and Fullers earth.

a. Products: Provide:

"Standoff Marble Poultice", ProSoCo, Inc.

or equal approved by Architect.

6. Provide drop cloths, sheets, tape, etc. to protect the structure, people landscaping and surrounding areas.

2.2 APPLICATION EQUIPMENT

A. For application of the approved products, use only such equipment as is recommended for application by the manufacturer of the particular product and as indicated.

B. Prior to use of application equipment, verify that the proposed equipment is actually compatible with the material to be applied, and that integrity of the system will not be jeopardized by use of the proposed equipment.

C. Spray Equipment: Provide equipment for controlled spray application of water and chemical cleaners, if any, at rates indicated for pressure, measured at spray tip, and for volume.

1. For spray application of chemical cleaners provide low-pressure tank or chemical pump suitable for chemical cleaner indicated, equipped with cone-shaped spray-tip.

2. For spray application of water provide fan-shaped spray-tip which disperses water at angle of not less than 15 degrees.

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3. For application by brush or roller, provide all equipment required by the manufacturers printed literature.

2.3 OTHER MATERIALS

A. Provide other materials, not specifically described but required for a complete and proper installation, as selected by the Contractor subject to the approval of the Architect.

A. Examine the areas and conditions under which work of this Section will be performed. Correct conditions detrimental to timely and proper completion of the Work. Do not proceed until unsatisfactory conditions are corrected.

B. Test panels of all chemical systems are required. Minimum size shall be 4' x 8' and in a location as approved by the Architect.

3.2 MATERIALS PREPARATION

1. Mix and prepare materials in strict accordance with the manufacturers' recommendations for their intended use and as approved by the Architect.

2. When materials are not in use, store in tightly covered containers.

3. Maintain containers used in storage, mixing, and application of paint in a clean condition, free from foreign materials and residue.

3.3 SURFACE PREPARATION

1. Perform preparation and cleaning procedures in strict accordance with the manufacturer's recommendations and as approved by the Architect.

2. Remove removable items which are in place and are not scheduled to receive cleaning or provide surface applied protection prior to surface

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preparation and chemical restoration operations.

3. Following completion of restoration in each space or area, reinstall the removed items by using workmen who are skilled in the necessary trades.

4. Schedule the cleaning and protect surrounding areas so that contaminants from the cleaning process will not damage surrounding areas.

3.4 APPLICATION

A. Safety precautions/personnel: All workmen must be protected by rubber or polyethylene suits, boots, gloves, face shield and protective head gear. Avoid contact with eyes and skin. Comply with OSHA regulations and all other applicable governmental regulations.

B. Safety precautions/adjacent area: Employ all necessary precautions and coverings to prevent unnecessary damage to the building being restored as well as surrounding buildings, landscaping, electrical and adjacent items, etc. Avoid drift as it may injure passersby or damage vehicles.

C. Efflorescence: Remove efflorescence using soft bristle brushes wherever possible.

D. Poultice application: (When approved by the Architect)

1. Apply the prepared poultice mix to the surface using a plaster trowel or airless spray equipment. Uniformly apply a 1/4" thick coating.

2. Using a light polyethylene film or other moisture resistant material, cover the area treated with Stand Off Marble Poultice. Press poly film against poultice - it will cling to the surface. Tape or otherwise seal off edges of the poly film.

3. Allow poultice (covered with film) to remain on the surface for 12 to 24 hours.

4. Remove protective film. Scrape off poultice. Wash the surface thoroughly with fresh water, using a sponge or cloth.

5. Repeat poultice procedures where necessary.

E. Defoliant: Apply with a sprinkling can or pump spray to plant growth on brick and in mortar joints. Reapply after 3 days if needed. Completely remove all dead vegetation from brick surfaces and mortar joints.

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F. Preparatory work:

1. Masonry Restorer - Typical areas of all surfaces that will be contacted during chemical treatment should be thoroughly tested before beginning.

2. Paint Remover - Provide a test patch to check the action and timing of the remover. (Additional applications may be required on heavy accumulations.)

3. Efflorescence - Provide a test patch to check the effectiveness of poultice and compatibility with historic brick and mortar. Hand brush all surfaces with a soft bristle brush prior to application of poultice. (Additional applications may be required on heavy accumulations.)

4. Methods/Application: Strictly adhere to the manufacturers printed instructions subject to the approval of the Architect/Engineer.