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SECTION 09940
DECORATIVE COATINGS
NOTE ** Sto Finish Systems exterior and interior decorative
coatings.
NOTE **
NOTE ** This section is based on products manufactured by
Sto Finish Systems Division of Sto Corporation,
which is located at the following address:
NOTE ** P.O. Box 44609
NOTE ** Atlanta GA 30336-5609
NOTE ** Tel: (800) 221-2397
NOTE ** Tel: (404) 346-3666
NOTE ** Fax: (404) 346-3119
NOTE **
NOTE ** Sto Finish Systems Division offers a complete line
of decorative coating products for exterior and
interior surfaces.
NOTE **
NOTE ** SECTION 09940 - DECORATIVE COATINGS, Copyright
1997, The Architect's Catalog, Inc.
PART 1 GENERAL
1.1 SECTION INCLUDES
NOTE ** Enter a description of the surfaces to be finished
with the coatings specified in this section. If
more than one exterior or interior coating is
specified, edit the following list to indicate
where each type of coating is to be applied.
A. Coating to be applied to the following exterior surfaces:
1. ___________________.
2. ___________________.
3. ___________________.
4. ___________________.
B. Coating to be applied to the following interior surfaces:
1. ___________________.
2. ___________________.
3. ___________________.
4. ___________________.
1.2 RELATED SECTIONS
NOTE ** Delete any sections below not relevant to this
project; add others as required.
A. Section 03300 - Cast-In-Place Concrete.
B. Section 04810 - Unit Masonry Assemblies.
C. Section 07620 - Sheet Metal Flashing and Trim.
D. Section 07900 - Joint Sealers.
E. Section 09210 - Gypsum Plaster.
F. Section 09215 - Gypsum Veneer Plaster.
G. Section 09210 - Portland Cement Plaster.
H. Section 09260 - Gypsum Board Assemblies.
1.3 REFERENCES
NOTE ** Delete references from the list below that are not
actually required by the text of the edited
section.
A. ASTM B 117 - Standard Practice for Operating Salt Spray
(Fog) Testing Apparatus.
B. ASTM C 67 - Standard Test Methods of Sampling and Testing
Brick and Structural Clay Tile.
C. ASTM C 150 - Standard Specification for Portland Cement.
D. ASTM C 297 - Standard Test Method for Tensile Strength of
Flat Sandwich Constructions in Flatwise Plane.
E. ASTM D 412 - Standard Test Methods for Vulcanized Rubber
and Thermoplastic Rubbers and Thermoplastic Elastomers-
Tension.
F. ASTM D 522 - Standard Test Methods for Mandrel Bend Test
of Attached Organic Coatings.
G. ASTM D 968 - Standard Test Methods for Abrasion
Resistance of Organic Coatings by Falling Abrasive.
H. ASTM D 1653 - Standard Test Methods for Water Vapor
Transmission of Organic Coating Films.
I. ASTM D 2240 - Standard Test Method for Rubber Property --
Durometer Hardness.
J. ASTM D 2247 - Standard Practice for Testing Water
Resistance of Coatings in 100% Relative Humidity.
K. ASTM D 2794 - Standard Test Method for Resistance of
Organic Coatings to the Effects of Rapid Deformation
(Impact).
L. ASTM D 2805 - Standard Test Method for Hiding Power of
Paints by Reflectometry.
M. ASTM D 3273 - Standard Test Method for Resistance to
Growth of Mold on the Surface of Interior Coatings in an
Environmental Chamber.
N. ASTM D 3274 - Standard Test Method for Evaluating Degree
of Surface Disfigurement of Paint Films by Microbial
(Fungal or Algal) Growth or Soil and Dirt Accumulation.
O. ASTM D 4060 - Standard Test Method for Abrasion
Resistance of Organic Coatings by the Taber Abraser.
P. ASTM D 4214 - Standard Test Methods for Evaluating the
Degree of Chalking of Exterior Paint Films.
Q. ASTM D 4258 - Standard Procedure for Surface Cleaning of
Concrete for Coating.
R. ASTM D 4261 - Standard Procedure for Surface Cleaning of
Concrete Unit Masonry for Coating.
S. ASTM D 4541 - Standard Test Method for Pull-Off Strength
of Coatings Using Portable Adhesion-Testers.
T. ASTM E 84 - Standard Test Method for Surface Burning
Characteristics of Building Materials.
U. ASTM E 96 - Standard Test Methods for Water Vapor
Transmission of Materials.
V. ASTM E 119 - Standard Test Methods for Fire Tests of
Building Construction and Materials.
W. ASTM E 313 - Standard Test Method of Indexes of Whiteness
and Yellowness of Near-White Opaque Materials.
X. ASTM G 21 - Standard Practice for Determining Resistance
of Synthetic Polymeric Materials to Fungi.
Y. ASTM G 53 - Standard Practice for Operating Light- and
Water-Exposure Apparatus (Fluorescent UV-Condensation
Type) for Exposure of Nonmetallic Materials.
Z. DIN 52617 - The Determination of Water Absorption
Coefficient of Building Materials; Deutsche Industrie
Norm.
AA. EIMA 101.01 - Standard Test Method for Freeze-Thaw
Resistance of Exterior Insulation and Finish Systems
(EIFS) (modified ASTM C 67); EIFS Industry Members
Association (EIMA).
BB. FS TT-C-555B - Coating, Textured (For Interior and
Exterior Masonry Surfaces).
1.4 SUBMITTALS
A. Submit under provisions of Section 01300.
B. Product Data: Manufacturer's descriptive literature and
specifications for specified decorative coatings,
demonstrating compliance of products with specified
requirements.
NOTE ** Delete the following paragraph if specifying custom
colors or finishes.
C. Selection Samples: For each coating type specified, two
sets of color chips representing manufacturer's full
range of available colors and finishes.
D. Verification Samples: For each color and finish
selected, two samples, minimum size 8 inches (200 mm)
square, representing actual color and finish of products
to be installed.
E. Manufacturer's Qualifications.
F. Specimen of manufacturer's warranty.
G. Installer's Qualifications: Include list of previous
projects which identifies the following for each
project:
1. Project location and date of completion.
2. Architect's name, address, and telephone number.
3. Owner's name, address, and telephone number.
H. Manufacturer's printed installation instructions for each
specified product, including product storage requirements
and recommendations for specific project conditions.
I. Operation and Maintenance Data: Manufacturer's printed
instructions and recommendations for maintaining and
cleaning of coatings.
1.5 QUALITY ASSURANCE
A. Manufacturer Qualifications: Minimum fifteen years
documented experience as single-source producer of
products specified in this section, and current member in
good standing of Sealant Waterproofing and Restoration
Institute (SWRI).
B. Installer Qualifications: Minimum three years documented
experience installing finishes specified in this section,
capable of demonstrating successful completion of a
minimum of three previous projects of similar size and
complexity, and employing applicators having minimum
three years experience applying products specified in
this section.
C. Mock-Up: Construct mock-up for each specified coating
color and texture, using materials specified in this
section.
NOTE ** Retain one of the following two sub-paragraphs.
1. Construct mock-up as directed, at location indicated
or directed.
2. Construct each mock-up at location indicated or
directed, size __ feet (__ m) by __ feet (__ mm).
3. Obtain Architect's acceptance of mock-up before
beginning construction activities of this section;
accepted mock-up will be standard by which completed
construction activities of this section is judged.
NOTE ** Retain one of the following two sub-paragraphs.
4. Mock-up may not remain as part of Work.
5. Accepted mock-up may remain as part of Work.
NOTE ** Delete the following paragraph if not required.
D. Pre-Installation Meeting:
1. Convene at job site seven calendar days prior to
scheduled beginning of construction activities of
this section to review requirements of this section.
2. Require attendance by representatives of the
following:
a. Installer of this section.
b. Other entities directly affecting, or affected
by, construction activities of this section.
3. Notify Architect four calendar days in advance of
scheduled meeting date.
1.6 DELIVERY, STORAGE, AND HANDLING
A. Store products of this section in manufacturer's unopened
packaging until installation.
B. Maintain storage area conditions for products of this
section in accordance with manufacturer's instructions
until installation.
1.7 PROJECT CONDITIONS
NOTE ** Retain paragraphs that apply to project.
A. Do not apply coating materials to exterior surfaces until
ambient temperature, and surface temperature of surfaces
to receive coating materials, is above 40 degrees F (4
degrees C) and is expected to remain so for 24 hours
after application of finish coating.
B. Do not apply coating materials to interior surfaces until
structure is weathertight and maintains ambient
temperature, and surface temperature of surfaces to
receive coating materials, above 40 degrees F (4 degrees
C).
1.8 SEQUENCING
NOTE ** Delete any of the following paragraphs that do not
apply to project.
A. Sequence construction activities of this section with
construction activities of other sections to prevent
penetration of substrates after application of finish
coatings, and to prevent damage to finish coatings by
subsequent construction activities.
B. Ensure that sheet metal flashings and trim adjacent to
coating applications are installed immediately after
finish coating has dried.
C. Ensure that joint sealers adjacent to coating
applications are installed immediately after finish
coating has dried.
1.9 WARRANTY
A. Manufacturer's Warranty: Manufacturer's standard
warranty against defects in materials.
PART 2 PRODUCTS
2.1 MANUFACTURERS
A. Manufacturer: Sto Finish Systems Division of Sto
Corporation; P.O. Box 44609, Atlanta GA 30336-5609; ASD.
Tel: (800) 221-2397 or (404) 346-3666, Fax: (404) 346-
3119.
NOTE ** Delete one of the two following paragraphs;
coordinate with Division 1 requirements.
B. Requests for substitution will be considered in
accordance with provisions of Section 01600.
C. Substitutions: Not permitted.
D. Unless otherwise specified for an individual product or
material, supply all products specified in this section
from the same manufacturer.
2.2 MATERIALS
NOTE ** Delete coating materials not required. If more
than one exterior or interior coating is required,
it may be useful to give each a Type designation,
for ease of identifying the location of each.
NOTE **
NOTE ** Below is a summary of the coatings in this section,
with some characteristics that may be applicable to
selection:
NOTE **
NOTE ** Coating Type Texture Aggregate
NOTE **
NOTE ** StoSilco Shield ________ Smooth none
Exterior
NOTE ** StoSilco Lastic ________ Smooth none
Exterior
NOTE ** StoSilco LIT ________ Textured Marble
Exterior
NOTE ** StoSilco FlexFinish ________ Textured Marble
Exterior
NOTE ** Stolit Acrylic ________ Marble
Exterior
NOTE ** FlexFinish Acrylic ________ none
Exterior
NOTE ** Decocoat Acrylic Textured none
Interior
A. Smooth Exterior Coating: StoSilco(R) Shield; silicone-
enhanced coating.
1. Minimum solids content: 55 percent by weight; 37
percent by volume.
2. Surface burning, when tested in accordance with ASTM
E 84: Flame spread 0; smoke developed 5.
3. Flexibility, when tested in accordance with ASTM D
522: Pass 1/2-inch (13 mm) mandrel bend test at 20
degrees F (-7 degrees C), 50 degrees F (10 degrees
C), and at 77 degrees F (25 degrees C).
NOTE ** The following test is based on a scale of 0-100,
with 100 being optimum rating.
4. Hiding power, when tested in accordance with ASTM D
2805: 99.6 contrast ratio.
5. Water vapor transmission, when tested in accordance
with modified ASTM E 96: 56 perms (3203 ng/Pa s sq
m) for 6-mil (0.15 mm) dry film thickness at 28 days.
6. Accelerated weathering resistance, when tested in
accordance with ASTM G 53: No deterioration,
cracking or noticeable yellowing after 5000 hours.
NOTE ** The following test is based on a scale of 1-10,
with 10 being optimum rating.
7. Chalking, when tested in accordance with ASTM D 4214:
9 rating after 5000 hours.
NOTE ** The following test is based on a scale in which 0
indicates no yellowing, and 2 indicates barely
discernible yellowing.
8. Yellowing index, when tested in accordance with ASTM
E 313: 0.41 rating after 5000 hours.
9. Freeze/thaw resistance, when tested in accordance
with EIMA 101.01: No delamination or deterioration
after 25 cycles.
10. Mildew resistance, when tested in accordance with
ASTM D 3274: No mildew growth after 60 days.
11. Salt spray resistance, when tested in accordance with
ASTM B 117: No deleterious effects after 500 hours.
12. Water penetration, when tested in accordance with FS
TT-C-555B: No water penetration after 24 hours of
driving rain.
13. Abrasion resistance, when tested in accordance with
ASTM D 4060, with Taber CS-10 wheel: 0.0196 ounce
(0.56 g) weight loss at wear through.
14. Adhesion to concrete, when tested in accordance with
ASTM D 4541: 300 pounds per square inch (2068 kPa)
after 28 days.
15. Tensile strength, when tested in accordance with ASTM
D 412: 50 pounds per square inch (345 kPa) after 28
days.
NOTE ** Delete all but one of following three sub-
paragraphs. Coordinate selection method with
requirements for samples.
16. Color: Selected from full range of manufacturer's
standard colors.
17. Color: _________________.
18. Colors: Specified in SCHEDULES Article of this
section.
B. Smooth Exterior Coating: StoSilco(R) Lastic Coating;
silicone-enhanced elastomeric coating.
1. Minimum solids content: 63 percent by weight; 50
percent by volume.
2. Dry-to-touch time: 40-51 minutes at 90 degrees F (32
degrees C), 60-90 minutes at 75 degrees F (24 degrees
C), 8-12 hours at 40 degrees F (4.4 degrees C),
3. Surface burning, when tested in accordance with ASTM
E 84: Flame spread 5; smoke developed 5.
4. Elongation, when tested in accordance with ASTM D
412: Minimum 540 percent.
5. Flexibility, when tested in accordance with ASTM D
522: Pass 180-degree 1/8-inch (3 mm) mandrel bend
test at -30 degrees F (-34 degrees C).
6. Water absorption, when tested in accordance with DIN
52617: 0.177 ounces per square foot per 24-hour
period (0.0254 kg/sq m/24-hr).
7. Water vapor transmission, when tested in accordance
with ASTM E 96 (modified ASTM D 1653): 14 perms (800
ng/Pa s sq m) for 15-mil (0.38 mm) dry film thickness
at 28 days.
8. Accelerated weathering resistance, when tested in
accordance with ASTM G 53: No deterioration,
cracking or noticeable yellowing after 2000 hours.
NOTE ** The following test is based on a scale of 1-10,
with 10 being optimum rating.
9. Chalking, when tested in accordance with ASTM D 4214:
9 rating after 2000 hours.
NOTE ** The following test is based on a scale in which 0
indicates no yellowing, and 2 indicates barely
discernible yellowing.
10. Yellowing index, when tested in accordance with ASTM
E 313: 1.1 rating after 2000 hours.
11. Dirt pick-up resistance, when tested in accordance
with ASTM D 3274: 97 percent reflectance retained
after 1 hour.
12. Freeze/thaw resistance, when tested in accordance
with EIMA 101.01: No cracking, delamination or
deterioration after 25 cycles.
13. Mildew resistance, when tested in accordance with
ASTM G 53: No mildew growth after 21 days.
14. Salt spray resistance, when tested in accordance with
ASTM B 117: No deleterious effects after 300 hours.
15. Water penetration, when tested in accordance with FS
TT-C-555B: No water penetration after 24 hours of
driving rain.
16. Adhesion to concrete, when tested in accordance with
ASTM D 4541: 135 pounds per square inch (931 kPa)
after 28 days.
17. Durometer Shore A hardness, when tested in accordance
with ASTM D 2240: 35-40 at 28 days.
18. Tensile strength, when tested in accordance with ASTM
D 412: 120 pounds per square inch (827 kPa) after 28
days.
NOTE ** Delete all but one of following three sub-
paragraphs. Coordinate selection method with
requirements for samples.
19. Color: Selected from full range of manufacturer's
standard colors.
20. Color: _________________.
21. Colors: Specified in SCHEDULES Article of this
section.
C. Textured Exterior Coating: StoSilco(R) LIT Textured
Coating; silicone-enhanced, with marble aggregate finish.
1. Surface burning, when tested in accordance with ASTM
E 84: Flame spread 0; smoke developed 15.
2. Flexibility, when tested in accordance with ASTM D
522: Pass 4-inch (100 mm) mandrel bend test.
3. Water absorption, when tested in accordance with DIN
52617: 0.016 ounces per square foot per hour (0.005
kg/sq m/hr).
4. Water vapor transmission, when tested in accordance
with modified ASTM E 96: 42 perms (2402 ng/Pa s sq
m) at 28 days.
5. Accelerated weathering resistance, when tested in
accordance with ASTM G 53: No deterioration,
cracking or noticeable yellowing at 10-power
magnification after 5000 hours.
NOTE ** The following test is based on a scale of 1-10,
with 10 being optimum rating.
6. Chalking, when tested in accordance with ASTM D 4214:
9 rating after 2000 hours, 8 rating after 5000 hours.
NOTE ** The following test is based on a scale in which 0
indicates no yellowing, and 2 indicates barely
discernible yellowing.
7. Yellowing index, when tested in accordance with ASTM
E 313: 0.77 rating after 5000 hours.
8. Freeze/thaw resistance, when tested in accordance
with EIMA 101.01: No delamination or deterioration
after 90 cycles.
9. Mildew resistance, when tested in accordance with
ASTM D 3273: No mildew growth after 60 days.
10. Salt spray resistance, when tested in accordance with
ASTM B 117: No deleterious effects after 700 hours.
11. Water penetration, when tested in accordance with FS
TT-C-555B: No water penetration after 24 hours of
driving rain.
12. Water resistance, when tested in accordance with ASTM
D 2247: No deleterious effects after 42 days.
13. Abrasion resistance, when tested in accordance with
ASTM D 968: No cracking, checking, or loss of film
integrity at 1057 quarts (1000 l) sand.
14. Adhesion to concrete, when tested in accordance with
ASTM D 4541: 120 pounds per square inch (827 kPa)
after 28 days.
NOTE ** Delete all but one of following three sub-
paragraphs. Coordinate selection method with
requirements for samples.
15. Color and texture: Selected from full range of
manufacturer's standard selections.
16. Color _________________; ______________ texture.
17. Colors and textures: Specified in SCHEDULES Article
of this section.
D. Textured Exterior Coating: StoSilco(R) FlexFinish
Elastomeric Textured Coating; silicone-enhanced, with
marble aggregate finish.
1. Surface burning, when tested in accordance with ASTM
E 84: Flame spread 5; smoke developed 5.
2. Elongation, when tested in accordance with ASTM D
412: Minimum 500 percent at 28 days.
3. Flexibility, when tested in accordance with ASTM D
522: Pass 1/2-inch (13 mm) and 1/8-inch (3 mm)
mandrel bend tests at -30 degrees F (-34 degrees C).
4. Water absorption, when tested in accordance with DIN
52617: 0.27 ounces per square foot per hour (0.830
kg/sq m/hr).
5. Water vapor permeability, when tested in accordance
with ASTM D 1653: 16 perms (915 ng/Pa s sq m) at 28
days.
6. Accelerated weathering resistance, when tested in
accordance with ASTM G 53: No deterioration,
cracking or noticeable yellowing after 2000 hours.
NOTE ** The following test is based on a scale of 1-10,
with 10 being optimum rating.
7. Chalking, when tested in accordance with ASTM D 4214:
9 rating after 2000 hours.
NOTE ** The following test is based on a scale in which 0
indicates no yellowing, and 2 indicates barely
discernible yellowing.
8. Yellowing index, when tested in accordance with ASTM
E 313: 0.26 rating after 2000 hours.
9. Dirt pick-up resistance, when tested in accordance
with ASTM D 3274: 96 percent reflectance retained
after 1 hour.
10. Freeze/thaw resistance, when tested in accordance
with EIMA 101.01: No deleterious effects after 25
cycles.
11. Mildew resistance, when tested in accordance with
ASTM G 21: No mildew growth after 21 days.
12. Water penetration, when tested in accordance with FS
TT-C-555B: No water penetration after 24 hours of
driving rain.
13. Adhesion to concrete, when tested in accordance with
ASTM D 4541: 115 pounds per square inch (793 kPa)
after 28 days.
14. Tensile strength, when tested in accordance with ASTM
D 412: 55 pounds per square inch (379 kPa) after 28
days.
NOTE ** Delete all but one of following three sub-
paragraphs. Coordinate selection method with
requirements for samples.
15. Color and texture: Selected from full range of
manufacturer's standard selections.
16. Color _________________; ______________ texture.
17. Colors and textures: Specified in SCHEDULES Article
of this section.
E. Textured Exterior Coating: Stolit; acrylic coating with
marble aggregate texture.
1. Surface burning, when tested in accordance with ASTM
E 84: Flame spread 5; smoke developed 5.
2. Fire resistance rating effect on existing wall
assembly, when tested in accordance with ASTM E 119:
No change.
3. Flexibility, when tested in accordance with ASTM D
522: Pass 4-inch (100 mm) mandrel bend test.
4. Water absorption, when tested in accordance with DIN
52617: 0.162 ounces per square foot per hour (0.049
kg/sq m/hr).
5. Water vapor transmission, when tested in accordance
with ASTM E 96 (modified ASTM D 1653): 37 perms
(2116 ng/Pa s sq m).
6. Accelerated weathering resistance, when tested in
accordance with ASTM G 53: No deleterious effects at
10-power magnification after 5000 hours.
NOTE ** The following test is based on a scale of 1-10,
with 10 being optimum rating.
7. Chalking, when tested in accordance with ASTM D 4214:
9 rating after 2000 hours, 8 rating after 5000 hours.
NOTE ** The following test is based on a scale in which 0
indicates no yellowing, and 2 indicates barely
discernible yellowing.
8. Yellowing index, when tested in accordance with ASTM
E 313: 1.5 rating after 5000 hours.
9. Freeze/thaw resistance, when tested in accordance
with EIMA 101.01: No cracking, delamination or
deterioration after 90 cycles.
10. Mildew resistance, when tested in accordance with
ASTM D 3273: No mildew growth after 42 days.
11. Salt spray resistance, when tested in accordance with
ASTM B 117: No deleterious effects after 500 hours.
12. Water penetration, when tested in accordance with FS
TT-C-555B: No water penetration after 24 hours of
driving rain.
13. Water resistance, when tested in accordance with ASTM
D 2247: No deleterious effects after 28 days.
14. Abrasion resistance, when tested in accordance with
ASTM D 968: No cracking, checking, or loss of film
integrity at 1057 quarts (1000 l) sand.
15. Adhesion to concrete, when tested in accordance with
ASTM D 4541: 90 pounds per square inch (620 kPa)
after 28 days.
NOTE ** Delete all but one of following three sub-
paragraphs. Coordinate selection method with
requirements for samples.
16. Color and texture: Selected from full range of
manufacturer's standard selections.
17. Color _________________; ______________ texture.
18. Colors and textures: Specified in SCHEDULES Article
of this section.
NOTE ** Retain the following paragraph if specifying
FlexFinish Coating.
F. Textured Exterior Coating: Sto FlexFinish; acrylic
elastomeric coating with marble aggregate texture.
1. Surface burning, when tested in accordance with ASTM
E 84: Flame spread 15; smoke developed 5.
2. Elongation, when tested in accordance with ASTM D
412: Minimum 200 percent for neat film.
3. Flexibility, when tested in accordance with ASTM D
522: Pass 1/2-inch (13 mm) mandrel bend test at -30
degrees F (-34 degrees C), 26 degrees F (-3.3 degrees
C), 32 degrees F (0 degrees C), and at 86 degrees F
(30 degrees C).
4. Water absorption, when tested in accordance with DIN
52617: 0.375 ounces per square foot per hour (0.113
kg/sq m/hr).
5. Water vapor permeability, when tested in accordance
with ASTM D 1653: 12 perms (686 ng/Pa s sq m).
6. Dirt pick-up resistance, when tested in accordance
with ASTM D 3274: 89 percent reflectance retained
after 1 hour.
7. Water penetration, when tested in accordance with FS
TT-C-555B: No water penetration after 24 hours of
driving rain.
8. Adhesion to concrete, when tested in accordance with
ASTM D 4541: 95 pounds per square inch (655 kPa)
after 28 days.
9. Tensile strength, when tested in accordance with ASTM
D 412: 60 pounds per square inch (414 kPa) after 28
days.
NOTE ** Delete all but one of following three sub-
paragraphs. Coordinate selection method with
requirements for samples.
10. Color and texture: Selected from full range of
manufacturer's standard selections.
11. Color _________________; ______________ texture.
12. Colors and textures: Specified in SCHEDULES Article
of this section.
NOTE ** Retain the following paragraph if specifying
Decocoat Coating.
G. Textured Interior Coating: Sto Decocoat; acrylic
coating.
1. Surface burning, when tested in accordance with ASTM
E 84: Flame spread 0; smoke developed 5.
2. Flexibility, when tested in accordance with ASTM D
522: Pass 1/8-inch (3 mm) mandrel bend test.
3. Water absorption, when tested in accordance with DIN
52617: 0.375 ounces per square foot per hour (0.113
kg/sq m/hr).
4. Water vapor permeability, when tested in accordance
with ASTM D 1653: 28 perms (1601 ng/Pa s sq m).
5. Volatile organic content (VOC): 3.85 ounces per
quart (100 gm/l).
6. Mildew resistance, when tested in accordance with
ASTM G 21: No mildew growth after 14 days.
7. Abrasion resistance, when tested in accordance with
Ebner Abrasion Test: 1.50 percent weight loss.
8. Adhesion, when tested in accordance with ASTM D 4541,
after 28 days: 15 pounds per square inch (103 kPa)
to gypsum board prior to substrate failure, 125
pounds per square inch (862 kPa) to concrete, and 100
pounds per square inch (689 kPa) to primed metal.
9. Impact resistance, when tested in accordance with
ASTM D 2794: No failure up to 70 inch-pounds
(886,200 N m) at 28 days.
10. Tensile strength, when tested in accordance with ASTM
D 412: 25 pounds per square inch (207 kPa) after 28
days.
NOTE ** Delete all but one of following three sub-
paragraphs. Coordinate selection method with
requirements for samples.
11. Color and texture: Selected from full range of
manufacturer's standard selections.
12. Color _________________; ______________ texture.
13. Colors and textures: Specified in SCHEDULES Article
of this section.
H. Surface Preparation Materials: Manufacturer's
proprietary materials indicated, specified in
manufacturer's instructions, or recommended by
manufacturer for correct application of coating
materials, including the following:
1. Surface conditioner: Acrylic-based surface sealer
and hardener for chalking substrates or highly-
absorptive substrates.
2. Primers: Silicone-enhanced or acrylic-based.
3. Crack repair material: Fiber-reinforced acrylic-
based material formulated for mixing with Portland
cement; used with specified fiber reinforcement
material for repair of substrate cracks up to 1/8
inch (3 mm) wide.
4. Filler material: Acrylic-based flat filler.
5. Patching and leveling material for applications up to
1/16 inch (1.5 mm) thick: Single-component, polymer-
modified, cement-based material containing fiber
reinforcement.
6. Patching and leveling material for applications up to
1/4 inch (6 mm) thick: Single-component, polymer-
modified, cement-based material containing fiber
reinforcement; used with or without specified fiber
reinforcement material.
I. Reinforcing Mesh: Symmetrical, interlaced, open-weave
glass-fiber reinforcing fabric mesh, nominal weight 4.8
ounces per square yard (163 g/sq m), with minimum 25
percent by weight alkaline-resistant coating.
J. Waterproofing Finish for Sloped Surfaces: Sto Flexyl;
fiber-reinforced acrylic-based material formulated for
mixing with Portland cement.
NOTE ** Delete the following paragraph if specifying
Decocoat coating only.
K. Portland Cement: ASTM C 150, Type 1.
L. Water: Clean, potable, not containing materials which
would impair appearance or performance of coating
materials.
2.3 MIXES
A. Mix materials specified to be site-mixed in accordance
with manufacturer's mixing instructions; do not dilute
finish coatings except as instructed.
B. Mix only enough materials that can be applied during
working time recommended by manufacturer; do not retemper
mixes.
C. Do not add anti-freeze admixtures or other admixtures
which may adversely affect performance or appearance of
coating materials.
PART 3 EXECUTION
3.1 EXAMINATION
NOTE ** Design considerations for substrates:
NOTE **
NOTE ** Design for maximum allowable deflection, normal to
wall plane, of L/360; include wind load
requirements.
NOTE **
NOTE ** Prevent accumulation of water behind coating, by
condensation within substrate or by water leakage.
NOTE **
NOTE ** Design sloped surfaces 1:2 (27 degrees) minimum,
and minimum 12 inches (300 mm) width; increased
slope is required in climates where ice or snow
accumulation is likely - the application of StoMesh
embedded in StoFlexyl is also required.
NOTE **
NOTE ** Coatings specified in this section are not for
application below-grade, or on substrates subjected
to intermittent or constant hydrostatic pressure.
NOTE **
NOTE ** For specific project conditions, consult the
manufacturer's detail manual or technical
representative.
NOTE **
A. Inspect substrates to receive coatings for the following:
1. Contamination: Presence of foreign matter which
might affect coating performance or appearance.
2. Delamination, damage, defects, or deterioration.
3. Cracking: Measure widths of cracks; record
locations.
4. Surface absorption and chalking.
5. Moisture content: Use moisture meter of type
recommended by manufacturer to determine if moisture
content is within limits recommended by manufacturer.
6. Surface plane within tolerances required in
manufacturer's instructions.
3.2 PREPARATION
A. Correct unacceptable conditions reported by installer.
B. Protect surfaces adjacent to locations of coating
application; do not allow coating materials on surfaces
not indicated to receive them.
C. Prepare substrates to receive coating materials in
accordance with manufacturer's instructions and as
follows:
NOTE ** Delete any of the following sub-paragraphs not
applicable to project.
1. Remove loose, damaged, or deteriorated materials.
2. Remove surface contaminants on concrete surfaces in
accordance with ASTM D 4258.
3. Remove surface contaminants on concrete masonry
surfaces in accordance with ASTM D 4261.
4. Repair surface defects using patching and leveling
material.
5. Repair surface cracks using patching and leveling
material, or patching and leveling material with
fabric reinforcement, according to manufacturer's
recommendations for crack size.
6. Apply surface conditioner to chalked or absorbent
surfaces.
7. Apply skim coat to level substrates to required plane
tolerances.
8. Trowel-apply waterproofing material with fabric
reinforcement to sloped surfaces; immediately embed
fabric reinforcement, lapping seams 2-1/2 inches (64
mm).
3.3 APPLICATION
A. Apply prime and finish coats in accordance with
manufacturer's instructions; do not exceed manufacturer's
recommended spread rate for coating materials.
B. Do not allow coatings to be applied over sealant joints,
cold joints, expansion joints, or control joints.
C. At sloped surfaces, use waterproofing finish coating with
reinforcing mesh.
NOTE ** Where coating is the sole weather barrier in wall
assembly, specify a continuous void-free and
pinhole-free finish coating.
D. Apply continuous void-free and pinhole-free finish
coating.
E. Finish final coats to match accepted mock-up.
3.4 PROTECTION
A. Protect installed coatings from damage by subsequent
construction activities.
B. Repair installed coatings, if damaged by subsequent
construction activities, in accordance with
manufacturer's recommendations, so repairs are not
visible at a distance of 10 feet (3 m).
NOTE ** The following sample schedule may assist in
establishing a schedule to identify locations of
different colors and finishes; coordinate with
drawings. Delete entire Article if not required.
3.5 SCHEDULES
A. Location: Exterior concrete walls.
1. Type _________________.
2. Color: _____________________.
3. Texture: ___________________.
B. Location: Interior gypsum board walls at corridors.
1. Type _________________.
2. Color: _____________________.
3. Texture: ___________________.
END OF SECTION