EXTERIOR STUCCO SYSTEM FOR INSULATED CONCRETE FORMS (ICF)
I. DESCRIPTION and SCOPE
The MULTICOAT INSULATED CONCRETE FORM (ICF) SYSTEM incorporates a Base Coat of SCRATCH KOTE 2000 and a Finish Coat of MULTI-TEX STUCCO MIX applied over vertical substrate of properly prepared ICF block. The SYSTEM provides a decorative finish to all makes and types of ICF Block.
The scope of this specification describes all materials and installation procedures for the MULTICOAT ICF SYSTEM.
II. MATERIALS
1. SCRATCH KOTE 2000 Base Coat
As manufactured by MULTICOAT CORPORATION, shall be a synthetic resin modified cementitious material, furnished in dry form, mixed with potable water at job site in proportions so as to provide desired consistency (1 1/2 - 2 1/4 gallons). Physical properties of the cured mix shall meet or exceed the following test criteria:
| SCRATCH KOTE 2000 |
| |
TEST |
METHOD |
RESULTS |
| 1. |
Weatherometer |
ASTM-G23 |
2000 hours - passed |
| 2. |
Compressive Strength |
ASTM C109 45 Days air cured |
2595psi |
| 3. |
Tensile Strength |
ASTM-C190 |
457psi |
| 4. |
Bond Strength
(Flatwise Tension) |
ASTM-C297 |
225psi |
| 5. |
Abrasion Test |
ASTM-1242A 1000 cyc - 1000 gms |
39 mil loss |
| 6. |
Salt Spray |
ASTM-B117 |
300 Hrs. - Passed |
| 7. |
Water Vapor Transmission |
ASTM-E96A |
1.26 Perms |
| 8. |
50-Cycle Freeze Thaw |
ASTM-C67 |
Passed |
| 9. |
Flexural Strength |
ASTM-D790 |
Modulus of Rupture - 770psi |
| 10. |
Impact Resistance |
MIL-D-3134F |
Passed |
| 11. |
Flame Spread |
ASTM-E84 |
Class A |
2. MULTI-TEX STUCCO MIX Finish Coat
As manufactured by MULTICOAT CORPORATION, shall be a high build waterbase flexible acrylic combined with various sand fillers to obtain desired coating texture. Physical properties of the cured coating shall meet or exceed the following test criteria:
| STUCCO MIX |
| |
TEST |
METHOD |
RESULTS |
| 1. |
2000 Hour Weatherometer |
ASTM G23 |
No marked evidence of surface cracking, blistering, flaking, chalking, crazing or any other deleterious effects observed |
| 2. |
Moisture Resistance |
ASTM D2247 |
No blistering or cracking of surface |
| 3. |
Freeze-Thaw |
Section VI D of acceptance |
No change in color, no cracks, no crazing, no delamination |
| 4. |
Abrasion Test
(Falling Sand) |
ASTM DE968 Method A |
Initial wear started at 3200 liters |
| 5. |
Fungus |
Mil-Std-810B (Method 508) |
Passed |
| 6. |
Moisture Vapor Transmission |
ASTM E96 |
4.56 Perms, the coating is not a vapor barrier |
| 7. |
Mildew Resistance |
Fed. Spec. 6271 |
Passed |
| 8. |
Salt Spray Resistance |
ASTM-B117 |
Passed 18 cycles |
| 9. |
Wind Driven Rain Resistance |
TTC-555b |
Passed 24 hours |
| 10. |
Fire Hazard Classification |
ASTM E-84 |
Fuel contribution -0,
smoke development -5,
Flame spread -10. |
3. FIBERGLASS MESH
Physical properties shall be in accordance with the following specifications:
| FIBERGLASS MESH |
| |
PHYSICAL PROPERTIES |
| 1. |
Count: 20 x 10 Leno Weave - Visual Count - 12 x 6 |
| 2. |
Yarn: Warp - 37 1/0 0.7z ECH Fill - ECK 1,800 yd / lb. roving |
| 3. |
Tensile: 150 x 150 pounds per inch of width |
| 4. |
Weight: 4.5 oz. Per Square Yard |
| 5. |
Thickness: 0.0135 inches |
| 6. |
475 sq. ft. rolls - 38" wide |
III. SURFACE PREPARATION
1. ICF Block must be installed according to manufacturers and architectural specifications.
The ICF Block substrate must be structurally sound and free of oil, paint, sealers and other foreign materials which may prevent proper bonding.
Repair and fill all holes or divots in ICF Block with SCRATCH KOTE 2000.
IV. APPLICATION
1. Base Coat - SCRATCH KOTE 2000 (furnished in 65 lb. bags)
A. Mix with potable (clean) water in approximate amount of 1 3/4 - 2 1/4 gallons per 65 lb. bag preferably with MULTICOAT Mixing Paddle. Mix vigorously to disperse all lumps and thoroughly wet all particles. (1-1 1/2 minutes minimum after all dry material added)
B. Adjust to desired consistency.
C. Apply by spray or trowel to entire substrate.
D. Embed and trowel Fiberglass Mesh in SCRATCH KOTE 2000. Cure minimum of 12 hours before proceeding, longer in cool weather.
2. Finish Coat - MULTICOAT STUCCO MIX (furnished in 65 lb buckets)
A. Factory premixed colored stucco mix must be mechanically mixed before application to ensure uniformity. If using "Tint Base", stucco mix with color additives, before mixing, pour entire bottle contents into 65 lb stucco mix pail, then add two caps full of clean water into empty bottle, shake vigorously and add with continued mechanical mixing.
B. Apply Multicoat stucco mix directly to base coated wall with trowel or sprayer, and finish to desired texture.
V. WARNING
Do not apply if surface temperature is below 50°F, or over 100°F, or if ambient temperature is less than 50°F and falling, over 100°F and rising, or if precipitation or extreme high humidity is expected within a 24-hour period.
VI. WARRANTY
Materials are guaranteed with respect to uniformity and quality within manufacturers' specifications. Seller makes no other warranty, expressed or implied, regarding the use of its products. Since use of the product is beyond the Seller's control, the Buyer assumes all risks of use. Seller's sole obligation shall be to replace material if found to be defective. Seller shall not be liable for any damages, injury, loss, direct or indirect or consequential, resulting from use of its products.
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