Guide Specification

 

Southwest Fireproofing Products

Spray-Applied Fire Resistive Materials

 

 

 

 

 

 

©2004 Southwest Fireproofing Products Co.

Southwest Fireproofing, Type 5GP, Type 5EF, Type 5MD, Type 7GP, Type 7HD,

Type 1XR, Type DK, Type HC and Type 7TB are trademarks of Southwest Fireproofing Products Co.

 

 

Suggested Short Form Specification

Spray-Applied cementitious thermal barrier shall be Type 7TB^TM Thermal Barrier  as manufactured by Southwest Fireproofing Products Co. or its licensed manufacturers. It shall be spray‑applied by machine to the thickness required by local code specifications and as indicated on all drawings. The method of mixing and application shall comply with the manufacturer's recommendations as set forth in the current literature.

Suggested Full Specification

1. Scope

    The applicator shall provide all labor, materials and equipment required for:

    1.1 Complete installation of the thermal barrier.

    1.2 Protection of adjacent surfaces from over spray.

1.3 Removal of all dirt, oil and other foreign substances from the foam plastic surface which would    impair adhesion.

     1.4 Removal of all decomposed foam which might impair thermal barrier adhesion.

2. Material

2.1 Spray-Applied cementitious thermal barrier shall be Type 7TB^TM Thermal Barrier as manufactured by Southwest Fireproofing Products Co. or its licensed manufacturers. All manufactured material shall be delivered in original unopened packages. Materials shall be kept dry until ready for use. The packages of material shall be kept off the ground, under cover and away from sweating walls and other damp surfaces. Material that has been exposed to water before actual use shall be discarded. Stock is to be rotated and the oldest material used first.

2.2 Water shall be clean and suitable for domestic consumption. It shall be free from such amounts of any foreign substances that would affect the set or bond of the thermal barrier material.

3. Acceptance and Performance Criteria

3.1 The sprayed thermal barrier shall have been tested and currently listed by Underwriters Laboratories Inc., or other code approved testing agency.

3.2 The thermal barrier shall have minimum in‑place bond strength of 500 psf over the protected substrate.

3.3 The installed and cured thermal barrier material shall be free from delaminating, flaking or dusting.

4. Installation

4.1 Application of sprayed thermal barrier shall be in accordance with the printed instructions of the material manufacturer and the fire test report information.

4.2 All surfaces to which sprayed thermal barrier will be applied shall be free of oil, grease, dirt, loose paint, decomposed foam or any other matter which would impair adhesion.

4.3 Whenever an untested or questionable foam substrate is encountered, sufficient bond tests shall be run to determine if special surface preparation is necessary.

4.4 All roof construction must be complete, the roof must be watertight and all roof traffic must cease prior to application of Type 7TB^TM to the urethane on roof assemblies. Roof traffic must not resume until the coating has dried and full bond strength is achieved.

Note: Drying time will vary according to relative humidity and temperature. With good ventilation and  fan-forced circulation, drying is usually complete in 10-14 days.

4.5 All clips, hangers, supports, sleeves and other attachments to the foam substrate are to be placed prior to the application of the thermal barrier material.

4.6 All patching and repairing of sprayed thermal barrier due to cutting by other trades, shall be performed under this section and paid for by the trades that performed the cutting.

5. Application and Cool Down Environment

5.1 When the outdoor temperature at the building site is less than 40⁰F the air and substrate temperature shall be maintained at or above 40⁰F for 24 hours before application and until the thermal barrier is completely dry.

5.2 Sufficient air circulation and ventilation shall be provided for forty‑eight hours after application of the Thermal Barrier, or for a longer period if required to dry the material.

Note: Type 7TB^TM Thermal Barrier shall be considered dry when its free moisture content is below  15% or when a representative sample placed in a fan‑forced oven at 120⁰F for 24 hours experiences    a weight loss of less than 15% of its original weight.

5.3 Coolers ‑ Cooling shall not begin until Type 7TB^TM Thermal Barrier is dry. Cooling shall be accomplished at a rate not to exceed 1⁰F/hour until a minimum temperature of 35⁰F is obtained. Doors shall be open sufficiently during pull‑down to relieve internal vacuum caused by cooling of the air.

5.4 Freezers ‑ Cooling to 35⁰F shall be accomplished as detailed for coolers (above). The room shall then be held at 35⁰F until the residual moisture has been removed and all components are in equilibrium condition. The holding period shall be no less than 7 days. The temperatures may then be dropped to operating temperatures as low as ‑ 20⁰F at a rate not to exceed 1/2⁰F per hour. Total daily temperature drop shall not exceed 10⁰F/day. After working temperature is reached, temperature fluctuations within the room shall be controlled so as not to exceed 1/2⁰F/hr or 10⁰F/day.

Note: The concrete slab will contract during pull‑down, causing openings at the slab‑to‑wall joints     and at contraction joints. If any caulking is necessary, it should be done prior to temperatures being dropped below 35⁰F.

6. Cleanup

After completion of the thermal barrier installation, application equipment shall be removed and all areas cleaned of deposits of sprayed thermal barrier materials.

END OF SECTION