Division 7
THERMAL AND MOISTURE PROTECTION

Section 07240
EXTERIOR INSULATION AND FINISH SYSTEM

PART 1 GENERAL

1.1 DESCRIPTION

.1 Work included: The work described in this section includes the supply and installation of the Exterior Insulation and Finish System.

.2 Related Work Under Other Sections:

STEEL STUDS AND FURRING:

Section ___________________________

EXTERIOR GYPSUM SHEATHING BOARD:

Section ___________________________

SEALANTS:

Section: __________________________

(See Note 3.)

1.2 QUALIFICATIONS

.1 The Exterior Insulation and Finish System shall be installed by a Contractor approved and certified by the system manufacturer. Certification must be in force at the time the project is bid and contracted for.

1.3 SUBMITTALS

.1 Submit to the owner, for approval, samples of finish coating of color and texture selected.

.2 Obtain owner's approval of samples before ordering materials and proceeding with work.

1.4 PRODUCT DELIVERY, STORAGE AND HANDLING

.1 Store materials in a cool dry place out of direct sunlight. Materials must be stored at a temperature of not less than 5°C (40°F).

1.5 JOB CONDITIONS

.1 Ambient temperature must be no less than 5°C (40°F) during installation and until the Adhesive and coatings are dry. (Minimum 24 hours).

1.6 PROTECTION

.1 Ongoing work needs to be protected from the elements until cured. Responsibility for protection must be determined prior to the job commencing.

PART 2 PRODUCTS

2.1 MATERIALS

.1 Exterior Insulation and Finish System: The system shall as supplied by Preswitt Manufacturing Ltd., and comprised of Insulation Board, Adhesive Compound, Reinforcing Fabric and Finish Coating.

.2 Insulation Boards: Shall be aged, expanded polystyrene insulation manufactured from Type A beads conforming to CGSB 51-GP-20M Type 1 (ASTM C-578) density 16 Kg/m (1.0 lb. per cubic foot); accordance with ASTM E-84; edges square; board size as recommended by the manufacturer.

.3 Adhesive Compound: Shall be Preswitt Adhesive Compound.

.4 Reinforcing Fabric: Shall be a balanced, open weave glass fibre fabric treated for compatibility with the system materials. Fabric shall be supplied by Preswitt Manufacturing Ltd.

.5 Heavy Duty Reinforcing Fabric: Shall be balanced, open weave glass fibre fabric treated for compatibility with the system materials and used in high impact areas only. Fabric shall be supplied by Preswitt Manufacturing Ltd.

.6 Finish Coating: Shall be Preswitt Quality Finish.

.7 Portland Cement: Type 1,1-11, or 11 meeting ASTM C150.

.8 Mechanical Fasteners if required, shall be as recommended by Preswitt Mfg Ltd.

.9 Metal flashings should be installed prior to EIFS application, and are the responsibility of the general contractor.

2.2 MIXING AND PREPARATION

.1 Adhesive and Basecoat: Drill-mix Adhesive Compound with Portland cement in a ratio of 1:1 by weight.

.2 Quality Finish: Drill-mix the material before applying to the wall surface.

PART 3 EXECUTION

3.1 INSPECTION

.1 Before commencing ensure that environmental and site conditions are suitable for the installation of the system.

.2 All areas should be even and free from surface irregularities.

.3 The substrate shall be a type approved by Preswitt Manufacturing Ltd.

.4 Where exterior gypsum sheathing is the specified substrate, ensure that it meets the required standard, is clean, dry, properly fastened and shows no sign of deterioration or defects.

.5 Wall surfaces shall be sound and free of ice and frost.

.6 Ensure that all surfaces are free from loose particles, foreign materials, form oil and traces of any other releasing agents.

.7 Any discrepancies shall be reported and rectified before the work proceeds. Commencement of work indicates acceptance of conditions.

3.2 INSTALLATION

Apply the Adhesive mixture to the Insulation Board, using a 3/8" notched trowel, or the ribbon and dab method.

.1 Press and secure the Insulation Board onto the wall surface. Ensure that the adhesive has solid contact with the substrate.

Boards shall be placed from a level baseline with vertical joints staggered and all joints butted tightly. At corners, alternate boards on adjacent planes, so that they interlock.

Gaps in the board joints must be filled with slivers of polystyrene, and uneven edges shall be sanded off; in neither case must the Adhesive mixture be used to fill the gaps, or level out the uneven edges. Board joints shall be flush and the insulated wall surface left flat and even.

.2 Evenly apply the specified Basecoat, 2mm (1/12") thick, to the exposed surface of the insulation board.

.3 Embed the Standard Reinforcing Fabric in the wet Basecoat, lapping the joints a minimum of 60mm (2½"); trowel smooth leaving no mesh visible.

.4 For high impact areas Heavy Duty Reinforcing Fabric shall be embedded in a Basecoat layer in a similar manner; the fabric shall be butt-jointed, with no laps, and allowed to dry for a least 24 hours.

This shall be done prior to installing the Standard Fabric Reinforced Basecoat. Both reinforced Basecoats are necessary for high impact areas.

The surface to receive the finish material shall be flat and even in all directions with no high points especially at Mesh laps.

.5 Apply Finish Coating with a steel trowel and obtain texture by use of a plastic trowel.

SPECIFICATION NOTES

.1 This guide specification is basic and must be adapted to suit the requirements of individual projects. Consult the manufacturer for specific recommendations.

.2 This guide specification is prepared in accordance with Construction Specifications three part section format and should be included under Division 7 - Thermal and Moisture Protection as Section 07240, in accordance with CSC/CSI Master Format for specifications.

.3 Insert list of related work specified in other Divisions, such as steel studs, exterior gypsum sheathing, sealants, flashings, etc. Sealant compounds should be compatible with Preswitt Wall System components. Insert also the appropriate section number.