Attach 3_Technical Specifications.pdf

Technical Specifications Columbine Ranger District Exterior Painting and Maintenance Project

San Juan National Forest

Bayfield, CO

Table of Contents:

SECTION 061000 - ROUGH CARPENTRY

SECTION 061533 - WOOD PATIO DECKING

SECTION 079200 - JOINT SEALANTS

SECTION 090190.52 - MAINTENANCE REPAINTING

SECTION 061000 - ROUGH CARPENTRY

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Framing with dimension lumber.

2. Framing with engineered wood products.

3. Shear wall panels.

4. Rooftop equipment bases and support curbs.

5. Wood blocking and nailers.

6. Wood furring

7. Wood sleepers.

8. Plywood backing panels.

PART 2 - PRODUCTS

2.1 WOOD PRODUCTS, GENERAL

A. Lumber: Comply with DOC PS 20 and applicable rules of grading agencies indicated. If no grading agency is indicated, comply with the applicable rules of any rules-writing agency certified by the ALSC Board of Review. Grade lumber by an agency certified by the ALSC Board of Review to inspect and grade lumber under the rules indicated.

1. Factory mark each piece of lumber with grade stamp of grading agency.

2. For exposed lumber indicated to receive a stained or natural finish, mark grade stamp on end or back of each piece.

3. Dress lumber, S4S, unless otherwise indicated.

B. Maximum Moisture Content:

1. Boards: [19 percent]

2. Dimension Lumber: [19 percent]

3. Timber. [19 percent]

C. Engineered Wood Products: Acceptable to authorities having jurisdiction and for which current model code research or evaluation reports exist that show compliance with building code in effect for Project.

1. Allowable design stresses, as published by manufacturer, are to meet or exceed those indicated. Manufacturer's published values are to be determined from empirical data or by rational engineering analysis and demonstrated by comprehensive testing performed by a qualified independent testing agency.

2.2 PRESERVATIVE TREATMENT

A. Preservative Treatment by Pressure Process: AWPA U1; Use Category UC2 for interior construction not in contact with ground, Use Category UC3b for exterior construction not in contact with ground, and Use Category UC4a for items in contact with ground.

1. Preservative Chemicals: Acceptable to authorities having jurisdiction and containing no arsenic or chromium.

B. Kiln-dry lumber after treatment to a maximum moisture content of 19 percent. Do not use material that is warped or that does not comply with requirements for untreated material.

C. Mark lumber with treatment quality mark of an inspection agency approved by the ALSC Board of Review.

D. Application: Treat items indicated on Drawings, and the following:

1. Wood cants, nailers, curbs, equipment support bases, blocking, stripping, and similar members in connection with roofing, flashing, vapor barriers, and waterproofing.

2. Wood sills, sleepers, blocking, furring, and similar concealed members in contact with masonry or concrete.

3. Wood framing and furring attached directly to the interior of below-grade exterior masonry or concrete walls.

4. Wood framing members that are less than 18 inches (460 mm) above the ground in crawlspaces or unexcavated areas.

5. Wood floor plates that are installed over concrete slabs-on-grade.

2.4 DIMENSION LUMBER FRAMING

A. Non-Load-Bearing Interior Partitions by Grade: [Construction or No. 2] grade.

1. Application: [Interior partitions not indicated as load bearing].

2. Species:

a. Southern pine or mixed southern pine; SPIB.

b. Northern species; NLGA.

c. Eastern softwoods; NeLMA.

d. Western woods; WCLIB or WWPA.

B. Framing Other Than Non-Load-Bearing Partitions by Grade: [Construction or No. 2] grade.

1. Application: Framing other than [interior partitions not indicated as load bearing].

2. Species:

a. Hem-fir (north); NLGA.

b. Southern pine; SPIB.

c. Douglas fir-larch; WCLIB or WWPA.

d. Southern pine or mixed southern pine; SPIB.

e. Spruce-pine-fir; NLGA.

f. Douglas fir-south; WWPA.

g. Hem-fir; WCLIB or WWPA.

h. Douglas fir-larch (north); NLGA.

i. Spruce-pine-fir (south); NeLMA, WCLIB, or WWPA.

D. Exposed Framing: Hand-select material for uniformity of appearance and freedom from characteristics, on exposed surfaces and edges, that would impair finish appearance, including decay, honeycomb, knot-holes, shake, splits, torn grain, and wane.

1. Species and Grade: As indicated above for load-bearing construction of same type.

2.7 MISCELLANEOUS LUMBER

A. Provide miscellaneous lumber indicated and lumber for support or attachment of other construction, including the following:

1. Blocking.

2. Nailers.

3. Rooftop equipment bases and support curbs.

4. Cants.

5. Furring.

6. Grounds.

B. Dimension Lumber Items: [Construction or No. 3] grade lumber of any species.

C. Concealed Boards: [19] percent maximum moisture content and any of the following species and grades:

1. Mixed southern pine or southern pine; No. [3] grade; SPIB.

2. Eastern softwoods; No. [3] Common grade; NeLMA.

3. Northern species; No. [3] Common grade; NLGA.

4. Western woods; [Construction or No. 2 Common] grade; WCLIB or WWPA.

2.9 FASTENERS

A. General: Fasteners are to be of size and type indicated and comply with requirements specified in this article for material and manufacture. Provide nails or screws, in sufficient length, to penetrate not less than 1-1/2 inches (38 mm) into wood substrate.

1. Where rough carpentry is exposed to weather, in ground contact, pressure-preservative treated, or in area of high relative humidity, provide fasteners with hot-dip zinc coating complying with ASTM A153/A153M.

B. Power-Driven Fasteners: Fastener systems with an evaluation report acceptable to authorities having jurisdiction, based on ICC-ES AC70.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Framing Standard: Comply with AF&PA's WCD 1, "Details for Conventional Wood Frame Construction," unless otherwise indicated.

B. Framing with Engineered Wood Products: Install engineered wood products to comply with manufacturer's written instructions.

C. Set work to required levels and lines, with members plumb, true to line, cut, and fitted. Fit rough carpentry accurately to other construction. Locate furring, nailers, blocking, grounds, and similar supports to comply with requirements for attaching other construction.

D. Install shear wall panels to comply with manufacturer's written instructions.

E. Install metal framing anchors to comply with manufacturer's written instructions. Install fasteners through each fastener hole.

F. Do not splice structural members between supports unless otherwise indicated.

G. Comply with AWPA M4 for applying field treatment to cut surfaces of preservative-treated lumber.

H. Where wood-preservative-treated lumber is installed adjacent to metal decking, install continuous flexible flashing separator between wood and metal decking.

I. Securely attach rough carpentry work to substrate by anchoring and fastening as indicated, complying with the following:

1. Table 2304.9.1, "Fastening Schedule," in ICC's International Building Code (IBC).

2. Table R602.3(1), "Fastener Schedule for Structural Members," and Table R602.3(2), "Alternate Attachments," in ICC's International Residential Code for One- and Two- Family Dwellings.

3. ICC-ES evaluation report for fastener.

3.2 PROTECTION

A. Protect wood that has been treated with inorganic boron (SBX) from weather. If, despite protection, inorganic boron-treated wood becomes wet, apply EPA-registered borate treatment.

Apply borate solution by spraying to comply with EPA-registered label.

B. Protect rough carpentry from weather. If, despite protection, rough carpentry becomes wet enough that moisture content exceeds that specified, apply EPA-registered borate treatment. Apply borate solution by spraying to comply with EPA-registered label.

END OF SECTION 061000

SECTION 061533 - WOOD PATIO DECKING

PART 1 - GENERAL

SUMMARY

Section Includes:

1. Wood decking.

2. Plastic decking.

3. Stairs for elevated decks.

4. Railings for elevated decks.

5. Wood benches for elevated decks.

6. Support framing for elevated decks.

PART 2 - PRODUCTS

LUMBER, GENERAL

Comply with DOC PS 20 and with grading rules of lumber grading agencies certified by ALSC's Board of Review as applicable. If no grading agency is indicated, comply with the applicable rules of any rules-writing agency certified by ALSC's Board of Review.

1. Factory mark each item with grade stamp of grading agency.

2. For items that are exposed to view in the completed Work, mark grade stamp on end or back of each piece.

3. Provide dressed lumber, S4S, unless otherwise indicated.

Maximum Moisture Content:

4. Boards: 19 percent

5. Dimension Lumber: 19 percent

6. Timber. 19 percent

WOOD DECKING AND STAIR TREADS

Dimension Lumber Decking and Stair Treads: Construction or No. 2 grade and any of the following species:

7. Hem-fir or hem-fir (North); NLGA, WCLIB, or WWPA.

8. Douglas fir-larch, Douglas fir-larch (North), or Douglas fir-south; NLGA, WCLIB, or

WWPA.

9. Mixed southern pine; SPIB.

10. Redwood; RIS.

Dimension Lumber Decking and Stair Treads: Deck Common or Construction Common redwood; RIS.

Board Decking and Stair Treads: 1-1/4-inch (32-mm) actual thickness radius-edged decking of[ any of] the following species and grades:

11. Douglas fir-larch or Douglas fir-south, [Patio 1]; WWPA.

12. Douglas fir-larch, [Select Dex] WCLIB.

13. Douglas fir-larch (North), [Select Patio] NLGA.

14. Hem-fir, [Patio 1] WWPA.

15. Hem-fir, [Select Dex] WCLIB.

16. Hem-fir (North), [Select Patio] NLGA.

17. Redwood, [Heart Clear] RIS.

18. Southern pine, [Premium]; SPIB.

19. Western red cedar, [Patio 1] ; WWPA.

20. Western red cedar, [Select Dex]; WCLIB.

21. Western red cedar (North), [Select Patio]; NLGA.

WOOD RAILINGS

Dimension Lumber Railing Members: Construction or No. 2 grade and any of the following species:

22. Hem-fir or hem-fir (North); NLGA, WCLIB, or WWPA.

23. Douglas fir-larch, Douglas fir-larch (North), or Douglas fir-south; NLGA, WCLIB, or

WWPA.

24. Mixed southern pine; SPIB.

25. Redwood; RIS.

26. Spruce-pine-fir or spruce-pine-fir (South); NeLMA, NLGA, WCLIB, or WWPA.

Dimension Lumber Railing Members: Heart B or Select Heart redwood; RIS.

Railing Boards Any of the following species and grades;

27. Douglas fir, C & Btr finish or C Select; NLGA, WCLIB, or WWPA.

28. Hem-fir, C & Btr finish or C Select; NLGA, WCLIB, or WWPA.

29. Redwood, [Heart B or Select Heart]; RIS.

30. Southern pine, B & B finish; SPIB.

DIMENSION LUMBER FRAMING

Deck and Stair Framing: [Construction or No. 2] grade and any of the following species:

31. Hem-fir (North); NLGA.

32. Southern pine; SPIB.

33. Douglas fir-larch; WCLIB or WWPA.

34. Spruce-pine-fir; NLGA.

35. Douglas fir-south; WWPA.

36. Hem-fir; WCLIB or WWPA.

37. Douglas fir-larch (North); NLGA.

38. Spruce-pine-fir (South); NeLMA, WCLIB, or WWPA.

POSTS

Dimension Lumber Posts: Construction or No. 2 grade and any of the following species:

39. Hem-fir or hem-fir (North); NLGA, WCLIB, or WWPA.

40. Douglas fir-larch, Douglas fir-larch (North), or Douglas fir-south; NLGA, WCLIB, or

WWPA.

41. Mixed southern pine; SPIB.

42. Spruce-pine-fir or spruce-pine-fir (South); NeLMA, NLGA, WCLIB, or WWPA.

43. Northern species; NLGA.

44. Eastern softwoods; NeLMA.

45. Western woods; WCLIB or WWPA.

Timber Posts: Balsam fir, Douglas fir-larch, Douglas fir-larch (North), eastern hemlock tamarack (North), hem-fir, southern pine, western hemlock, or western hemlock (North); [No. 1] [No. 2];

NeLMA, NLGA, SPIB, WCLIB, or WWPA.

Timber Posts: Alaska cedar; [No. 2]; WCLIB.

Timber Posts: Southern pine; [No. 2]; SPIB.

PRESERVATIVE TREATMENT

Pressure treat boards and dimension lumber with waterborne preservative in accordance with AWPA U1; Use Category UC3b for exterior construction not in contact with the ground, and Use Category UC4a for items in contact with the ground.

Pressure treat timber with waterborne preservative in accordance with AWPA U1; Use Category UC4a.

Preservative Chemicals: Acceptable to authorities having jurisdiction.

46. Do not use chemicals containing arsenic or chromium, except for timber posts.

Use process that includes water-repellent treatment.

Use process that does not include water repellents or other substances that might interfere with application of indicated finishes.

After treatment, redry boards dimension lumber and timber to 19 percent maximum moisture content.

Mark treated wood with treatment quality mark of an inspection agency approved by ALSC's Board of Review. Retain first option in subparagraph below if authorities having jurisdiction require quality mark on all materials.

Application: Treat all wood unless otherwise indicated.

47. Framing members less than 18 inches (460 mm) above grade.

48. Sills and ledgers.

49. Members in contact with masonry or concrete.

50. Posts.

51. Round wood poles.

52. Decking.

53. Stair treads.

FASTENERS

General: Provide fasteners of size and type indicated, acceptable to authorities having jurisdiction, and that comply with requirements specified in this article for material and manufacture. Provide nails or screws, in sufficient length, to penetrate not less than 1-1/2 inches (38 mm) into wood substrate.

54. Use fasteners with hot-dip zinc coating complying with ASTM A153/A153M or ASTM F2329 unless otherwise indicated.

55. For pressure-preservative-treated wood, use stainless steel fasteners.

CONCEALED DECKING FASTENERS

Deck Splines: Corrosion-resistant metal or plastic splines that fit in grooves routed into the sides of decking material and are fastened to deck framing with screws. Splines provide uniform spacing of decking material.

Deck Clips: Black-oxide-coated, stainless steel clips designed to be fastened to deck framing with screws, and to secure decking material with teeth that also provide uniform spacing of decking material.

Deck Tracks: Formed metal strips designed to be fastened to deck framing and to secure decking material from underside with screws. Made from epoxy-powder-coated, hot-dip galvanized steel or stainless steel.

PART 3 - EXECUTION

INSTALLATION, GENERAL

Set work to required levels and lines, with members plumb, true to line, cut, and fitted. Fit work to other construction; scribe and cope as needed for accurate fit.

Framing Standard: Comply with AF&PA WCD1 unless otherwise indicated.

Install wood decking and stair treads with crown up (bark side down).

Install plastic lumber to comply with manufacturer's written instructions.

Secure decking to framing with deck splines, deck clips, deck tracks, or, screws.

Install metal framing anchors to comply with manufacturer's written instructions.

Do not splice structural members between supports unless otherwise indicated.

Apply copper naphthenate field treatment to comply with AWPA M4, to cut surfaces of preservative-treated lumber.

Securely attach exterior rough carpentry work to substrate by anchoring and fastening as indicated, complying with the following:

1. ICC-ES AC70 for power-driven fasteners.

2. "Fastening Schedule" in ICC's International Building Code.

3. "Fastener Schedule for Structural Members" and "Alternate Attachments" in ICC's

International Residential Code for One- and Two-Family Dwellings.

INSTALLATION OF ELEVATED DECK JOIST FRAMING

General: Install joists with crown edge up and support ends of each member with not less than 1-1/2 inches (38 mm) of bearing on wood or metal, or 3 inches (76 mm) on masonry. Attach floor joists where framed into wood supporting members by using wood ledgers as indicated or, if not indicated, by using metal joist hangers. Do not notch joists.

Lap members framing from opposite sides of beams or girders not less than 4 inches (102 mm,) or securely tie opposing members together.

INSTALLATION OF STAIRS

Provide stair framing with no more than 3/8-inch (9.5-mm) variation between largest and smallest treads and risers within each flight.

Treads and Risers: Secure by gluing and screwing to carriages. Countersink fastener heads, fill flush, and sand filler. Extend treads over carriages and finish with bullnose edge.

INSTALLATION OF RAILINGS

Balusters: Fit to railings, glue, and screw in place. Countersink fastener heads, fill flush, and sand filler.

Newel Posts: Secure to stringers and risers with countersunk-head wood screws and glue.

Railings: Secure wall rails with metal brackets. Fasten freestanding railings to newel posts and to trim at walls with countersunk-head wood screws or rail bolts and glue.

END OF SECTION 061533

Copyright 2022 by The American Institute of Architects (AIA)

SECTION 079200 - JOINT SEALANTS

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Silicone joint sealants.

2. Nonstaining silicone joint sealants.

3. Urethane joint sealants.

4. Immersible joint sealants.

5. Mildew-resistant joint sealants.

6. Latex joint sealants.

1.7 WARRANTY

A. Special Installer's Warranty: Installer agrees to repair or replace joint sealants that do not comply with performance and other requirements specified in this Section within specified warranty period.

1. Warranty Period: Two years from date of Substantial Completion.

B. Special Manufacturer's Warranty: Manufacturer agrees to furnish joint sealants to repair or replace those joint sealants that do not comply with performance and other requirements specified in this Section within specified warranty period.

1. Warranty Period: Five years from date of Substantial Completion.

C. Special warranties specified in this article exclude deterioration or failure of joint sealants from the following:

1. Movement of the structure caused by stresses on the sealant exceeding sealant manufacturer's written specifications for sealant elongation and compression.

2. Disintegration of joint substrates from causes exceeding design specifications.

3. Mechanical damage caused by individuals, tools, or other outside agents.

4. Changes in sealant appearance caused by accumulation of dirt or other atmospheric contaminants.

PART 2 - PRODUCTS

2.1 JOINT SEALANTS, GENERAL

A. Compatibility: Provide joint sealants, backings, and other related materials that are compatible with one another and with joint substrates under conditions of service and application, as demonstrated by joint-sealant manufacturer, based on testing and field experience.

B. Colors of Exposed Joint Sealants: As selected by Architect from manufacturer's full range.

PART 3 - EXECUTION

3.1 PREPARATION

A. Surface Cleaning of Joints: Clean out joints immediately before installing joint sealants to comply with joint-sealant manufacturer's written instructions and the following requirements:

1. Remove all foreign material from joint substrates that could interfere with adhesion of joint sealant, including dust, paints (except for permanent, protective coatings tested and approved for sealant adhesion and compatibility by sealant manufacturer), old joint sealants, oil, grease, waterproofing, water repellents, water, surface dirt, and frost.

2. Clean porous joint substrate surfaces by brushing, grinding, mechanical abrading, or a combination of these methods to produce a clean, sound substrate capable of developing optimum bond with joint sealants. Remove loose particles remaining after cleaning operations above by vacuuming or blowing out joints with oil-free compressed air. Porous joint substrates include the following:

a. Concrete.

b. Masonry.

c. Unglazed surfaces of ceramic tile.

d. Exterior insulation and finish systems.

3. Remove laitance and form-release agents from concrete.

4. Clean nonporous joint substrate surfaces with chemical cleaners or other means that do not stain, harm substrates, or leave residues capable of interfering with adhesion of joint sealants. Nonporous joint substrates include the following:

a. Metal.

b. Glass.

c. Porcelain enamel.

d. Glazed surfaces of ceramic tile.

B. Joint Priming: Prime joint substrates where recommended by joint-sealant manufacturer or as indicated by preconstruction joint-sealant-substrate tests or prior experience. Apply primer to comply with joint-sealant manufacturer's written instructions. Confine primers to areas of joint-sealant bond; do not allow spillage or migration onto adjoining surfaces.

C. Masking Tape: Use masking tape where required to prevent contact of sealant or primer with adjoining surfaces that otherwise would be permanently stained or damaged by such contact or by cleaning methods required to remove sealant smears. Remove tape immediately after tooling without disturbing joint seal.

3.2 INSTALLATION OF JOINT SEALANTS

A. General: Comply with joint-sealant manufacturer's written installation instructions for products and applications indicated, unless more stringent requirements apply.

B. Sealant Installation Standard: Comply with recommendations in ASTM C1193 for use of joint sealants as applicable to materials, applications, and conditions indicated.

C. Install sealant backings of type indicated to support sealants during application and at position required to produce cross-sectional shapes and depths of installed sealants relative to joint widths that allow optimum sealant movement capability.

1. Do not leave gaps between ends of sealant backings.

2. Do not stretch, twist, puncture, or tear sealant backings.

3. Remove absorbent sealant backings that have become wet before sealant application, and replace them with dry materials.

D. Install bond-breaker tape behind sealants where sealant backings are not used between sealants and backs of joints.

E. Install sealants using proven techniques that comply with the following and at the same time backings are installed:

1. Place sealants so they directly contact and fully wet joint substrates.

2. Completely fill recesses in each joint configuration.

3. Produce uniform, cross-sectional shapes and depths relative to joint widths that allow optimum sealant movement capability.

F. Tooling of Nonsag Sealants: Immediately after sealant application and before skinning or curing begins, tool sealants in accordance with requirements specified in subparagraphs below to form smooth, uniform beads of configuration indicated; to eliminate air pockets; and to ensure contact and adhesion of sealant with sides of joint.

1. Remove excess sealant from surfaces adjacent to joints.

2. Use tooling agents that are approved in writing by sealant manufacturer and that do not discolor sealants or adjacent surfaces.

3. Provide concave joint profile in accordance with Figure 8A in ASTM C1193 unless otherwise indicated.

4. Provide flush joint profile at in accordance with Figure 8B in ASTM C1193.

5. Provide recessed joint configuration of recess depth and at in accordance with Figure 8C in ASTM C1193.

a. Use masking tape to protect surfaces adjacent to recessed tooled joints.

G. Clean off excess sealant or sealant smears adjacent to joints as the Work progresses by methods and with cleaning materials approved in writing by manufacturers of joint sealants and of products in which joints occur.

H. Protect joint sealants during and after curing period from contact with contaminating substances and from damage resulting from construction operations or other causes so sealants are without deterioration or damage at time of Substantial Completion. If, despite such protection, damage or deterioration occurs, cut out, remove, and repair damaged or deteriorated joint sealants immediately so installations with repaired areas are indistinguishable from original work.

SECTION 090190.52 - MAINTENANCE REPAINTING

PART 1 - GENERAL

1.1 SUMMARY

A. Section includes maintenance repainting as follows:

1. Removing existing paint.

2. Patching substrates.

3. Repainting, including staining and varnishing of wood.

1.3 DEFINITIONS

A. Gloss Level 1: Not more than 5 units at 60 degrees and 10 units at 85 degrees, according to

ASTM D523.

B. Gloss Level 2: Not more than 10 units at 60 degrees and 10 to 35 units at 85 degrees, according to ASTM D523.

C. Gloss Level 3: 10 to 25 units at 60 degrees and 10 to 35 units at 85 degrees, according to

ASTM D523.

D. Gloss Level 4: 20 to 35 units at 60 degrees and not less than 35 units at 85 degrees, according to

ASTM D523.

E. Gloss Level 5: 35 to 70 units at 60 degrees, according to ASTM D523.

F. Gloss Level 6: 70 to 85 units at 60 degrees, according to ASTM D523.

G. Gloss Level 7: More than 85 units at 60 degrees, according to ASTM D523.

1.7 QUALITY ASSURANCE

A. Color Matching: Custom computer-match paint colors to colors indicated For colors indicated by a standardized coding system, obtain a color chip for each color indicated from the color-coding-system company; computer match paint colors to the color chips.

B. Mockups: Prepare mockups of maintenance repainting processes for each type of coating system and substrate indicated and each color and finish required to demonstrate aesthetic effects and to set quality standards for materials and execution. Duplicate appearance of approved Sample submittals.

1. Surface-preparation mockups using applicable specified methods of cleaning and other surface preparation.

2. Coating mockups to represent surfaces and conditions for application of each type of coating system.

PART 2 - PRODUCTS

2.1 PREPARATORY CLEANING MATERIALS

A. Water: Potable.

B. Hot Water: Water heated to a temperature of 140 to 160 deg F (60 to 71 deg C).

C. Detergent Solution: Solution prepared by mixing 2 cups (0.5 L) of tetrasodium pyrophosphate (TSPP), 1/2 cup (125 mL) of laundry detergent that contains no ammonia, 5 quarts (5 L) of 5 percent sodium hypochlorite bleach, and 15 quarts (15 L) of warm water for every 5 gal. (20 L) of solution required.

D. Mildewcide: Commercial proprietary mildewcide or a job-mixed solution prepared by mixing 1/3 cup (80 mL) of household detergent that contains no ammonia, 1 quart (1 L) of 5 percent sodium hypochlorite bleach, and 3 quarts (3 L) of warm water.

E. Abrasives for Ferrous Metal Cleaning: Aluminum oxide paper, emery paper, fine steel wool, steel scrapers, and steel-wire brushes of various sizes.

F. Rust Remover: Manufacturer's standard phosphoric acid-based gel formulation, also called "naval jelly," for removing corrosion from iron and steel.

2.2 PAINT REMOVERS

A. Alkaline Paste Paint Remover: Manufacturer's standard alkaline paste or gel formulation for removing paint from masonry, stone, wood, plaster, or metal as required to suit Project; and containing no methylene chloride.

B. Low-Odor, Solvent-Type Paste Paint Remover: Manufacturer's standard low-odor, water-rinsable, solvent-type paste, gel, or foamed emulsion formulation for removing paint from masonry, stone, wood, plaster, or metal as required to suit Project; and containing no methanol or methylene chloride.

C. Low-Odor, Solvent-Type Paste Paint Remover: Manufacturer's standard low-odor, water-rinsable, solvent-type paste, gel, or foamed emulsion formulation for removing paint from masonry, stone, wood, plaster, or metal as required to suit Project; and containing no methanol or methylene chloride

2.3 PAINT, GENERAL

A. Material Compatibility:

1. Provide materials for use within each paint system that are compatible with one another and substrates indicated, under conditions of service and application as demonstrated by manufacturer, based on testing and field experience.

2. For each coat in a paint system, provide products recommended in writing by manufacturers of topcoat for use in paint system and on substrate indicated.

B. Colors: As selected by COR from full range of industry colors

2.4 PAINT MATERIALS, GENERAL

A. MPI Standards: Provide products that comply with MPI standards indicated and that are listed in its "MPI Approved Products List."

B. Transition Coat: Paint manufacturer's recommended coating for use where a residual existing coating is incompatible with the paint system.

2.7 PATCHING MATERIALS

A. Wood-Patching Compound: Two-part, epoxy-resin, wood-patching compound; knife-grade formulation as recommended in writing by manufacturer for type of wood repair indicated, tooling time required for the detail of work, and site conditions. Compound shall be designed for filling voids in damaged wood materials that have deteriorated from weathering and decay.

Compound shall be capable of filling deep holes and spreading to feather edge.

B. Metal-Patching Compound: Two-part, polyester-resin, metal-patching compound; knife-grade formulation as recommended in writing by manufacturer for type of metal repair indicated, tooling time required for the detail of work, and site conditions. Compound shall be produced for filling metal that has deteriorated from corrosion. Filler shall be capable of filling deep holes and spreading to feather edge.

C. Cementitious Patching Compounds: Cementitious patching compounds and repair materials specifically manufactured for filling cementitious substrates and for sanding or tooling prior to repainting; formulation as recommended in writing by manufacturer for type of cementitious substrate indicated, exposure to weather and traffic, the detail of work, and site conditions.

D. Gypsum-Plaster Patching Compound: Finish coat plaster and bonding compound according to ASTM C842 and manufacturer's written instructions.

PART 3 - EXECUTION

3.1 MAINTENANCE REPAINTING, GENERAL

A. Execution of the Work: In repainting surfaces, disturb them as minimally as possible and as follows:

1. Remove failed coatings and corrosion and repaint.

2. Verify that substrate surface conditions are suitable for repainting.

3. Allow other trades to repair items in place before repainting.

B. Mechanical Abrasion: Where mechanical abrasion is needed for the work, use gentle methods, such as scraping and lightly hand sanding, that will not abrade softer substrates, reducing clarity of detail.

C. Heat Processes: Do not use torches, heat guns, or heat plates.

3.2 EXAMINATION

A. Examine substrates and conditions, with Installer present, for compliance with requirements for maximum moisture content and other conditions affecting performance of painting work. Comply with paint manufacturer's written instructions for inspection.

B. Maximum Moisture Content of Substrates: Do not begin application of coatings unless moisture content of exposed surface is below the maximum value recommended in writing by paint manufacturer and not greater than the following maximum values when measured with an electronic moisture meter appropriate to the substrate material:

1. Concrete: 12 percent.

2. Gypsum Board: 12 percent.

3. Gypsum Plaster: 12 percent.

4. Masonry (Clay and CMU: 12 percent.

5. Portland Cement Plaster: 12 percent.

6. Wood: 15 percent.

C. Alkalinity: Do not begin application of coatings unless surface alkalinity is within range recommended in writing by paint manufacturer. Conduct alkali testing with litmus paper on exposed plaster, cementitious, and masonry surfaces.

3.3 PREPARATORY CLEANING

A. General: Use the gentlest, appropriate method necessary to clean surfaces in preparation for painting. Clean all surfaces, corners, contours, and interstices.

B. Detergent Cleaning: Wash surfaces by hand using clean rags, sponges, and bristle brushes. Scrub surface with detergent solution and bristle brush until soil is thoroughly dislodged and can be removed by rinsing. Use small brushes to remove soil from joints and crevices. Dip brush in solution often to ensure that adequate fresh detergent is used and that surface remains wet. Rinse with water applied by clean rags or sponges.

C. Solvent Cleaning: Use solvent cleaning to remove oil, grease, smoke, tar, and asphalt from painted or unpainted surfaces before other preparation work. Wipe surfaces with solvent using clean rags and sponges. If necessary, spot-solvent cleaning may be employed just prior to commencement of paint application, provided enough time is allowed for complete evaporation. Use clean solvent and clean rags for the final wash to ensure that all foreign materials have been removed. Do not use solvents, including primer thinner and turpentine, that leave residue.

D. Mildew: Clean off existing mildew, algae, moss, plant material, loose paint, grease, dirt, and other debris by scrubbing with bristle brush or sponge and detergent solution. Scrub mildewed areas with mildewcide. Rinse with water applied by clean rags or sponges.

E. Chemical Rust Removal:

1. Remove loose rust scale with specified abrasives for ferrous-metal cleaning.

2. Apply rust remover with brushes or as recommended in writing by manufacturer.

3. Allow rust remover to remain on surface for period recommended in writing by manufacturer or as determined by preconstruction testing. Do not allow extended dwell time.

4. Wipe off residue with mineral spirits and either steel wool or soft rags, or clean with method recommended in writing by manufacturer to remove residue.

5. Dry immediately with clean, soft cloths. Follow direction of grain in metal.

6. Prime immediately to prevent rust. Do not touch cleaned metal surface until primed.

F. Mechanical Rust Removal:

1. Remove rust with specified abrasives for ferrous-metal cleaning. Clean to bright metal.

2. Wipe off residue with mineral spirits and either steel wool or soft rags.

3. Dry immediately with clean, soft cloths. Follow direction of grain in metal.

4. Prime immediately to prevent rust. Do not touch cleaned metal surface until primed.

3.4 PAINT REMOVAL

A. General: Remove paint where indicated. Where cleaning methods have been attempted and further removal of the paint is required because of incompatible or unsatisfactory surfaces for repainting, remove paint to extent required by conditions.

1. Brushes: Use brushes that are resistant to chemicals being used.

a. Metal Substrates: If using wire brushes on metal, use brushes of same metal composition as metal being treated.

b. Wood Substrates: Do not use wire brushes.

2. Spray Equipment: Use spray equipment that provides controlled application at volume and pressure indicated, measured at nozzle. Adjust pressure and volume to ensure that spray methods do not damage surfaces.

a. Equip units with pressure gages.

b. Unless otherwise indicated, hold spray nozzle at least 6 inches (150 mm) from surface and apply material in horizontal, back-and-forth sweeping motion, overlapping previous strokes to produce uniform coverage.

c. For chemical spray application, use low-pressure tank or chemical pump suitable for chemical indicated, equipped with nozzle having a cone-shaped spray.

d. For water-spray application, use fan-shaped spray tip that disperses water at an angle of 25 to 50 degrees.

e. For heated water-spray application, use equipment capable of maintaining temperature between 140 and 160 deg F (60 and 71 deg C) at flow rates indicated.

B. Paint Removal with Hand Tools: Remove paint manually using hand-held scrapers, wire brushes, sandpaper, and metallic wool as appropriate for the substrate material.

C. Paint Removal with Alkaline Paste Paint Remover:

1. Remove loose and peeling paint using[ water,] scrapers, stiff brushes, or a combination of these. Let surface dry thoroughly.

2. Apply paint remover to dry, painted surface with brushes.

3. Allow paint remover to remain on surface for period recommended in writing by manufacturer or as determined by preconstruction testing.

4. Rinse with [cold] [hot] water applied by [low] [medium]-pressure spray to remove chemicals and paint residue.

5. Use mechanical methods recommended in writing by manufacturer to remove chemicals and paint residue.

6. Repeat process if necessary to remove all paint.

D. Paint Removal with Low-Odor, Solvent-Type Paste Paint Remover:

1. Remove loose and peeling paint using[ water,] scrapers, stiff brushes, or a combination of these. Let surface dry thoroughly.

2. Apply thick coating of paint remover to dry, painted surface with natural-fiber cleaning brush, deep-nap roller, or large paintbrush. Apply in one or two coats according to manufacturer's written instructions.

3. Allow paint remover to remain on surface for period recommended in writing by manufacturer or as determined by preconstruction testing.

4. Rinse with [cold] [hot] water applied by [low] [medium]-pressure spray to remove chemicals and paint residue.

5. Use mechanical methods recommended in writing by manufacturer to remove chemicals and paint residue.

6. Repeat process if necessary to remove all paint.

3.5 SUBSTRATE REPAIR

A. General: Repair substrate surface defects that are inconsistent with the surface appearance of adjacent materials and finishes.

B. Wood Substrate:

1. Repair wood defects including dents and gouges more than 1/4 inch (6 mm) in size and all holes and cracks by filling with wood-patching compound and sanding smooth. Reset or remove protruding fasteners.

2. Where existing paint is allowed to remain, sand irregular buildup of paint, runs, and sags to achieve a uniformly smooth surface.

C. Gypsum-Plaster and Gypsum-Board Substrates:

1. Repair defects including dents and chips more than 1/4 inch (6 mm) in size and all holes and cracks by filling with gypsum-plaster patching compound and sanding smooth.

Remove protruding fasteners.

2. Rout out surface cracks to remove loose, unsound material; fill with patching compound and sand smooth.

3.6 PAINT APPLICATION, GENERAL

A. Prepare surfaces to be painted according to the Surface-Preparation Schedule and with manufacturer's written instructions for each substrate condition.

B. Apply a transition coat over incompatible existing coatings.

C. Metal Substrate: Stripe paint corners, crevices, bolts, welds, and sharp edges before applying full coat. Apply two coats to surfaces that are inaccessible after completion of the Work. Tint stripe coat different than the main coating and apply with brush.

D. Blending Painted Surfaces: When painting new substrates patched into existing surfaces or touching up missing or damaged finishes, apply coating system specified for the specific substrate. Apply final finish coat over entire surface from edge to edge and corner to corner.

3.7 FIELD QUALITY CONTROL

A. Manufacturer's Field Service: Engage paint-remover manufacturer's factory-authorized service representative for consultation and Project-site inspection and to provide on-site assistance when requested by Architect.

3.8 CLEANING AND PROTECTION

A. At end of each workday, remove rubbish, empty cans, rags, and other discarded materials from Project site.

B. Protect work of other trades against damage from paint application. Correct damage to work of other trades by cleaning, repairing, replacing, and refinishing, as approved by Architect, and leave in an undamaged condition.

C. At completion of construction activities of other trades, touch up and restore damaged or defaced painted surfaces.

3.9 SURFACE-PREPARATION SCHEDULE

A. General: Before painting, prepare surfaces painting according to applicable requirements specified in this schedule.

1. Examine surfaces to evaluate each surface condition according to paragraphs below.

2. Where existing degree of soiling prevents examination, preclean surface and allow it to dry before making an evaluation.

3. Repair substrate defects according to "Substrate Repair" Article.

3.10 EXTERIOR MAINTENANCE REPAINTING SCHEDULE

B. Wood Siding:

1. Latex System: MPI REX 6.2A system over a transition coat.

a. Prime Coat: For MPI DSD 1 degree of surface degradation, touch up with topcoat.

b. Prime Coat: For MPI DSD 2 degree of surface degradation, spot prime with Primer, Alkyd for Exterior Wood.

c. Prime Coat: For MPI DSD 2 degree of surface degradation, spot prime with Primer, Latex for Exterior Wood.

d. Prime Coat: For MPI DSD 3 degree of surface degradation, fully prime coat with Primer, Alkyd for Exterior Wood.

e. Prime Coat: For MPI DSD 3 degree of surface degradation, fully prime coat with Primer, Latex for Exterior Wood.

f. Intermediate Coat: Latex, exterior, matching topcoat.

g. Topcoat: Latex, exterior flat (Gloss Levels 1-2)

h. Topcoat: Latex, exterior, low sheen (Gloss Levels 3-4).

i. Topcoat: Latex, exterior semigloss (Gloss Level 5).

j. Topcoat: Latex, exterior gloss (Gloss Level 6)

k. Color: Match colors indicated on Drawings.

2. Alkyd System: MPI REX 6.2C system over a transition coat.

a. Prime Coat: For MPI DSD 1 degree of surface degradation, touch up with topcoat.

b. Prime Coat: For MPI DSD 2 degree of surface degradation, spot prime with Primer, Alkyd for Exterior Wood.

c. Prime Coat: For MPI DSD 3 degree of surface degradation, fully prime coat with

Primer, Alkyd for Exterior Wood.

d. Intermediate Coat: Latex, exterior, matching topcoat.

e. Topcoat: Alkyd, exterior flat (Gloss Level 1)

f. Topcoat: Alkyd, exterior semigloss (Gloss Level 5).

g. Topcoat: Alkyd, exterior gloss (Gloss Level 6).

h. Color: Match colors indicated on Drawings.

C. Wood Windows, Frames, and Smooth Fasciae]:

1. Latex System: MPI REX 6.3A system over a transition coat.

a. Prime Coat: For MPI DSD 1 degree of surface degradation, touch up with topcoat.

b. Prime Coat: For MPI DSD 2 degree of surface degradation, spot prime with Primer, Alkyd for Exterior Wood.

c. Prime Coat: For MPI DSD 3 degree of surface degradation, fully prime coat with

Primer, Alkyd for Exterior Wood.

d. Intermediate Coat: Latex, exterior, matching topcoat

e. Topcoat: Latex, exterior flat (Gloss Levels 1-2)

f. Topcoat: Latex, exterior, low sheen (Gloss Levels 3-4)

g. Topcoat: Latex, exterior semigloss (Gloss Level 5)

h. Topcoat: Latex, exterior gloss (Gloss Level 6)

i. Color: Match colors indicated on Drawings.

2. Alkyd System: MPI REX 6.3B system over a transition coat.

a. Prime Coat: For MPI DSD 1 degree of surface degradation, touch up with topcoat.

b. Prime Coat: For MPI DSD 2 degree of surface degradation, spot prime with Primer, Alkyd for Exterior Wood.

c. Prime Coat: For MPI DSD 3 degree of surface degradation, fully prime coat with

Primer, Alkyd for Exterior Wood.

d. Intermediate Coat: Alkyd, exterior, matching topcoat

e. Topcoat: Alkyd, exterior flat (Gloss Level 1).

f. Topcoat: Alkyd, exterior semigloss (Gloss Level 5).

g. Topcoat: Alkyd, exterior gloss (Gloss Level 6).

h. Color: Match colors indicated on Drawings.

3. Varnish System (Clear): MPI REX 6.3F.

a. Prime Coat: For MPI DSD 1 degree of surface degradation, touch up with topcoat.

b. Prime Coat: For MPI DSD 2 degree of surface degradation, spot prime with topcoat.

c. Prime Coat: For MPI DSD 3 degree of surface degradation, fully prime coat with topcoat.

d. Intermediate Coat: Exterior varnish matching topcoat.

e. Topcoat: Varnish, with UV inhibitor, exterior, semigloss (Gloss Level 5)

f. Topcoat: Varnish, with UV inhibitor, exterior, gloss (Gloss Level 6)

g. Topcoat: Varnish, marine spar, exterior, gloss (Gloss Level 6)

D. Wood Deck and Stairs

1. Latex Porch and Floor System over Alkyd Primer:

a. Prime Coat: For MPI DSD 1 degree of surface degradation, touch up with topcoat.

b. Prime Coat: For MPI DSD 2 degree of surface degradation, spot prime with Primer, Alkyd/Oil for Exterior Wood.

c. Prime Coat: For MPI DSD 3 degree of surface degradation, fully prime coat with

Primer, Alkyd/Oil for Exterior Wood.

d. Intermediate Coat: Floor Paint, Latex, matching topcoat.

e. Topcoat: Floor paint, latex, low gloss

f. Topcoat: Floor paint, latex, gloss

g. Topcoat Additive: Manufacturer's standard additive to increase skid resistance of painted surface.

h. Color: Match colors indicated on Drawings.

2. Alkyd Floor Enamel System:

a. Prime Coat: For MPI DSD 1 degree of surface degradation, touch up with topcoat.

b. Prime Coat: For MPI DSD 2 degree of surface degradation, spot prime with topcoat.

c. Prime Coat: For MPI DSD 3 degree of surface degradation, fully prime coat with topcoat.

d. Topcoat: Floor paint, alkyd, low gloss.

e. Topcoat: Floor enamel, alkyd, gloss (Gloss Level 6).

f. Topcoat Additive: Manufacturer's standard additive to increase skid resistance of painted surface.

g. Color: Match colors indicated on Drawing