ADDENDUM #5 Date: October 19, 2015 This Addendum applicable to work designated herein shall be understood to be and is an Addendum and as such shall be part of and included in the Contract. To all bidders for furnishing all labor and materials necessary for:

ADDITION & REMODEL KENWORTH SALES – LEWISTON

LEWISTON, IDAHO

Failure to acknowledge receipt of this Addendum on the bid proposal form may result in rejection of your bid.

Bid Date: October 21, 2015 Time: 2:00 pm PDT (3:00 pm MDT)

Location: NBW Architects P.A. (Remote Bid Opening) 990 John Adams Parkway

Idaho Falls, Idaho Fax: (208) 522-8785

Email: rha@nbwarchitects.com

ARCHITECTURAL:

1. Delete Specification Section 033536 Polished Concrete.

2. New shop floor areas as indicated on attached sketches ADD5.1 and ADD5.2: Apply only Ashford Formula sealer as specified in Section 099600.

3. Existing shop floor areas as indicated on attached sketches ADD5.1 and ADD5.2: Lightly polish as specified in attached Section 033543 Polished Concrete Finishing and apply Ashford Formula sealer as specified in Section 099600.

4. New customer floor areas as indicated on attached sketches ADD5.1 and ADD5.2:

Apply two color blended stain as specified in attached Section 099610 Concrete Floor Staining.

5. Provide a unit cost per cubic yard for excavation and structural fill to be added or

deleted should it be required to adjust the actual quantities required to prepare the site as specified. Final actual quantities will be determined as required by the soils engineer.

6. Section 099300 STAINING AND TRANPARENT FINISHING: All wood doors are to be

field finished per Section 099300, delete Section 081416.2.c, transparent finishes.

Kenworth Sales Lewiston, Idaho

Addendum 5 - Page 2

7. Section 09900.3.7.b. MASONRY PAINTED: Delete references to Vinyl Acrylic systems.

Epoxy systems are to be applied to all interior exposed to view masonry wall surfaces.

8. Sheet A6.3 ROOM FINISH SCHEDULE. Revise Note No. 11 to include painting of all cleaned surfaced referenced including building structure, bag insulation and plywood wainscot.

9. APPROVED EQUAL - The following products have been approved as equal to the

product specifically noted in the specifications: Section 081416 WOOD DOORS: Lynden Oak Doors LD2000 Manufactures by Lynden Door

END OF ADDENDUM NO. 5

Kenworth Sales Lewiston, Idaho July 2015 033543

14035 1 POLISHED CONCRETE FINISHING

SECTION 033543 - POLISHED CONCRETE FINISHING

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01

Specification Sections, apply to this Section.

1.2 SUMMARY

A. Section includes polished concrete finishing.

1. Concrete for polished concrete, including formwork, reinforcement, concrete materials, mixture design,

placement procedures, initial finishing, and curing is specified in Section 033000 "Cast-in-Place Concrete."

B. Related Requirements:

1. Section 033000 "Cast-in-Place Concrete" for concrete not designated as polished concrete.

2. Section 099610 “Concrete Floor Staining” for coordinating with staining of concrete floors.

1.3 DEFINITIONS

A. Design Reference Sample: Sample designated by Architect in the Contract Documents that reflects acceptable

surface quality and appearance of polished concrete.

1.4 PREINSTALLATION MEETINGS

A. Preinstallation Conference: Conduct conference at Project site.

1. Before submitting design mixtures, review concrete design mixture and examine procedures for ensuring

quality of concrete materials. Require representatives of each entity directly concerned with polished concrete

to attend, including the following:

a. Contractor's superintendent.

b. Independent testing agency responsible for concrete design mixtures.

c. Ready-mix concrete manufacturer.

d. Cast-in-place concrete subcontractor.

e. Polished concrete finishing Subcontractor.

2. Review cold- and hot-weather concreting procedures, curing procedures, construction joints, concrete repair

procedures, concrete finishing, and protection of polished concrete.

1.5 ACTION SUBMITTALS

A. Product Data: For each type of product.

B. Polishing Schedule: Submit plan showing polished concrete surfaces and schedule of polishing operations for each

area of polished concrete before start of polishing operations. Include locations of all joints, including construction

joints.

1.6 INFORMATIONAL SUBMITTALS

A. Qualification Data: For Installer.

B. Material Certificates: For each of the following, signed by manufacturers:

1. Repair materials.

2. Liquid floor treatments.

1.7 QUALITY ASSURANCE

A. Field Sample Panels: After approval of verification sample and before casting concrete, produce field sample panels

to demonstrate the approved range of selections made under Sample submittals. Produce a minimum of three sets of

Kenworth Sales Lewiston, Idaho July 2015 033543

14035 2 POLISHED CONCRETE FINISHING

full-scale panels, approximately 48 by 48 inches minimum, to demonstrate the expected range of finish, color, and

appearance variations.

1. Locate panels as indicated or, if not indicated, as directed by Architect.

2. Maintain field sample panels during construction in an undisturbed condition as a standard for judging the

completed Work.

3. Demolish and remove field sample panels when directed.

B. Mockups: Before casting concrete, build mockups to verify selections made under Sample submittals and to

demonstrate typical joints, surface finish, tolerances, and standard of workmanship. Build mockups to comply with

the following requirements, using materials indicated for the completed Work:

1. Build mockups in the location and of the size indicated or, if not indicated, as directed by Architect.

2. Demonstrate curing, finishing, and protecting of polished concrete.

3. Subject to compliance with requirements, approved mockups may become part of the completed Work if

undisturbed at time of Substantial Completion.

1.8 FIELD CONDITIONS

A. Traffic Control: Maintain access for vehicular and pedestrian traffic as required for other construction activities.

PART 2 - PRODUCTS

2.1 LIQUID FLOOR TREATMENTS

A. Concrete Densifier:

1. Concrete Polishing Solutions "Armor Densifier MFL". (or equivalent.)

a. Permanent sealing, densifying, and hardening compound for concrete.

b. Odorless.

c. VOC: 0.

B. Concrete Sealer Penetrating Liquid Floor Treatments for Polished Concrete Finish: Clear, waterborne solution of

inorganic silicate or siliconate materials and proprietary components; odorless; that penetrates, hardens, and is

suitable for polished concrete surfaces.

1. Manufacturers: Subject to compliance with requirements, provide products by the following:

a. Shop floor areas: Ashford Formula.

C. Concrete Stain Guard:

1. Concrete Polishing Solutions "Armor Stain Shield MFL". (or equivalent.)

PART 3 - EXECUTION

3.1 POLISHING

A. Polish: Level 2: Low sheen, 400 grit.

B. Apply polished concrete finish system to cured and prepared slabs to match accepted mockup.

1. Machine grind floor surfaces to receive polished finishes level and smooth and to depth required to remove

damaged areas. (Approximately 1/4 inch of existing surface to be removed, field verify actual depth

required).

2. After 3 to 4 cuts with varying grit, repair and fill divots, cracks, etc. followed by 2 more cuts. Then install

densifier.

3. Continue polishing with progressively finer-grit diamond polishing pads to gloss level required and apply

sealer and stain guard.

4. Control and dispose of waste products produced by grinding and polishing operations.

5. Neutralize and clean polished floor surfaces.

END OF SECTION 033543

Kenworth Sales Lewiston, Idaho July 2015 099610

14035 1 CONCRETE FLOOR STAINING

SECTION 099610 - CONCRETE FLOOR STAINING

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01

Specification Sections, apply to this Section.

1.2 SUMMARY

A. Section includes concrete floor staining.

1. Concrete for stained concrete, including formwork, reinforcement, concrete materials, mixture design,

placement procedures, initial finishing, and curing is specified in Section 033000 "Cast-in-Place Concrete."

B. Related Requirements:

1. Section 033000 "Cast-in-Place Concrete" for concrete not designated as stained or polished concrete.

2. Section 033543 “Polished Concrete Finishing” for coordinating with polishing of concrete floors.

1.3 DEFINITIONS

A. Design Reference Sample: Sample designated by Architect in the Contract Documents that reflects acceptable

surface quality and appearance of polished concrete.

1.4 PREINSTALLATION MEETINGS

A. Preinstallation Conference: Conduct conference at Project site.

1. Before submitting design mixtures, review concrete design mixture and examine procedures for ensuring

quality of concrete materials. Require representatives of each entity directly concerned with polished concrete

to attend, including the following:

a. Contractor's superintendent.

b. Cast-in-place concrete subcontractor.

c. Polished concrete finishing Subcontractor.

2. Review concrete repair procedures, concrete finishing, and protection of stained concrete.

1.5 ACTION SUBMITTALS

A. Product Data: For each type of product.

B. Polishing Schedule: Submit plan showing polished concrete surfaces and schedule of polishing operations for each

area of polished concrete before start of polishing operations. Include locations of all joints, including construction

joints.

C. Samples for Initial Selection: For each type of product requiring color selection.

D. Samples for Verification: For each type of exposed color.

1.6 INFORMATIONAL SUBMITTALS

A. Qualification Data: For Installer.

B. Material Certificates: For each of the following, signed by manufacturers:

1. Repair materials.

2. Stain materials.

3. Liquid floor treatments.

Kenworth Sales Lewiston, Idaho July 2015 099610

14035 2 CONCRETE FLOOR STAINING

1.7 QUALITY ASSURANCE

A. Field Sample Panels: After approval of verification sample and before casting concrete, produce field sample panels

to demonstrate the approved range of selections made under Sample submittals. Produce a minimum of three sets of

full-scale panels, approximately 48 by 48 inches minimum, to demonstrate the expected range of finish, color, and

appearance variations.

1. Locate panels as indicated or, if not indicated, as directed by Architect.

2. Maintain field sample panels during construction in an undisturbed condition as a standard for judging the

completed Work.

3. Demolish and remove field sample panels when directed.

B. Mockups: Before casting concrete, build mockups to verify selections made under Sample submittals and to

demonstrate typical joints, surface finish, tolerances, and standard of workmanship. Build mockups to comply with

the following requirements, using materials indicated for the completed Work:

1. Build mockups in the location and of the size indicated or, if not indicated, as directed by Architect.

2. Demonstrate curing, finishing, and protecting of polished concrete.

3. Subject to compliance with requirements, approved mockups may become part of the completed Work if

undisturbed at time of Substantial Completion.

1.8 FIELD CONDITIONS

A. Traffic Control: Maintain access for vehicular and pedestrian traffic as required for other construction activities.

PART 2 - PRODUCTS

2.1 STAIN MATERIALS

A. Reactive Stain: Two color blended acidic-based stain with wetting agents and high-grade, UV-stable metallic salts

that react with calcium hydroxide in cured concrete to produce permanent, variegated, or translucent color effects.

1. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may

be incorporated into the Work include, but are not limited to the following:

a. Bomanite Co.

b. Brickform; a division of Solomon Colors.

c. Concrete Coatings, Inc.

d. Scofield, L. M. Company.

e. Specialty Concrete Products, Inc.

PART 3 - EXECUTION

3.1 STAINING

A. Newly placed concrete shall be at least 30 days old before staining.

B. Prepare surfaces according to manufacturer's written instructions and as follows:

1. Coordinate with Section 033543 Polished Concrete Finishing.

2. Clean concrete thoroughly by scraping, applying solvents or stripping agents, sweeping and pressure

washing, or scrubbing with a rotary floor machine and detergents recommended by stain manufacturer. Rinse

until water is clear and allow surface to dry.

a. Do not use acidic solutions to clean surfaces.

3. Test surfaces with droplets of water. If water beads and does not penetrate surface, or penetrates only in some

areas, profile surfaces by grinding, sanding, or abrasive blasting. Retest and continue profiling surface until

water droplets immediately darken and uniformly penetrate concrete surfaces.

4. Apply acidic solution to dampened concrete surfaces, scrubbing with uncolored, acid-resistant nylon-bristle

brushes until bubbling stops and concrete surface has texture of 120-grit sandpaper. Do not allow solution to

dry on concrete surfaces. Rinse until water is clear. Control, collect, and legally dispose of runoff.

5. Neutralize concrete surfaces and rinse until water is clear. Test surface for residue with clean white cloth.

Test surface according to ASTM F 710 to ensure pH is between 7 and 8.

Kenworth Sales Lewiston, Idaho July 2015 099610

14035 3 CONCRETE FLOOR STAINING

C. Allow concrete surface to dry before applying stain. Verify readiness of concrete to receive stain according to

ASTM D 4263 by tightly taping 18-by-18-inch, 4-mil-thick polyethylene sheet to a representative area of concrete

surface. Apply stain only if no evidence of moisture has accumulated under sheet after 16 hours.

D. Reactive Stain: Apply two color blended reactive stain to concrete surfaces according to manufacturer's written

instructions and as follows:

1. Apply stain by uncolored bristle brush, roller, or high-volume, low-pressure sprayer and immediately scrub

into concrete surface with uncolored, acid-resistant nylon-bristle brushes in continuous, circular motion. Do

not spread stain after fizzing stops. Allow to dry four hours and repeat application of stain in sufficient

quantity to obtain color consistent with approved mockup.

2. Remove stain residue after four hours by wet scrubbing with commercial-grade detergent recommended by

stain manufacturer. Rinse until water is clear. Control, collect, and legally dispose of runoff.

END OF SECTION 099610

ADD5.1990 JOHN ADAMS PARKWAY P.O. BOX 2212 - IDAHO FALLS, IDAHO 83402-2212

(P) 208-522-8779 (F) 208-522-8785 (W) nbwarchitects.com

ADD5.2990 JOHN ADAMS PARKWAY P.O. BOX 2212 - IDAHO FALLS, IDAHO 83402-2212

(P) 208-522-8779 (F) 208-522-8785 (W) nbwarchitects.com