TPO Roofing 07 54 23

SECTION 07 54 23THERMOPLASTIC POLYOLEFIN (TPO) ROOFING

SPEC WRITER NOTES:

2. Slopes: Do not use on slopes over 1: 12 (one inch per 12 inches). Provide 1: 50 (1/4 inch per 12 inches) minimum to drains without any "Gutters" (no slopes between drains). NO EXCEPTION TO MINIMUM SLOPE. Slope crickets 1: 50 (1/4 inch per foot). 3. Coordinate with plumbing requirements for roof drains and drain locations at low points and mid span where maximum deflection occurs. Do not put drains at columns or on slopes. Coordinate with insulation to provide sumps at drains. 4. Coordinate details and systems used to provide code required fire rated roofing system. 5. Adhered system is preferred over mechanically anchored system. 6. Coordinate with Section 07 22 00, ROOF AND DECK INSULATION. 7. Coordinate with Section 07 22 00, ROOF AND DECK INSULATION for roof insulation under the membrane. Decrease R value 5 percent when mechanical fasteners are used through insulation to compensate for parallel heat flow. 8. Do not use polystyrene, urethane, or wood fiberboard insulation under membrane. 9. Do not use over bituminous materials where direct contact occurs, including grease, oil, or other substances not compatible with TPO. Use a thin layer of insulation, slip sheet or separator sheet depending upon method of attachment. 10. Terminate base flashings minimum 200 mm (8 inches) above roof surface including curb for building expansion joints. 11. Do not put expansion joints at roof surface level.
12. Do not use "pitch pockets" or "sealant pockets" in lieu of base flashings and cap flashings. 13. This specification is for use over concrete, cellular insulating concrete decks, or insulation. Insert additional text when installed directly to other decks or insulation systems not specified in Section 07 22 00, ROOF AND DECK INSULATION. 14. Do not use pipe boots that provide less than 200 mm (8 inch) height above roof.

GENERAL

SUMMARY

Section Includes:
Thermoplastic Polyolefin (TPO) sheet roofing // adhered // mechanically fastened // to roof deck.

RELATED WORK

SPEC WRITER NOTE: Update and retain references only when specified elsewhere in this section.

Section 01 81 13, SUSTAINABLE CONSTRUCTION REQUIREMENTS: NonFlooring Adhesives and Sealants VOC Limits. Section 07 01 50.19, PREPARATION FOR REROOFING: Preparation of Existing Membrane Roofs and Repair Areas. Section 07 22 00, ROOF AND DECK INSULATION: Roof Insulation.

APPLICABLE PUBLICATIONS

Comply with references to extent specified in this section.