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OC DSS -Hillsborough Commons Skylight Replacement Smith Sinnett / 2020054 <br />Hillsborough, NC Orange County <br /> <br />NON PERMEABLE AIR AND VAPOR BARRIERS 07 27 00 - 7 <br />c. Seal the top edge of the membrane where it meets the substrate using termination sealant. <br />Trowel-apply a feathered edge to seal termination to shed water. <br />d. Install through-wall flashing membrane and extend 1/2 inch from outside edge of veneer. <br />Provide “end dam” flashing as detailed. <br />G. Primary Air/Vapor Barrier – Fluid Applied <br />1. Apply by spray or flat trowel a complete and continuous unbroken film of liquid air/vapor and rain <br />barrier membrane. <br />a. For temperatures below 40 degrees F apply one component solvent based bitumen <br />air/vapor barrier membrane at a rate of 18.6 sq.ft./gallon to a uniform wet thickness of 90 <br />mils. <br />2. Spray apply or trowel around all projections and penetrations ensuring a complete and continuous <br />air barrier membrane. <br />3. Allow air barrier membrane to dry as per manufacturers recommendations prior to placement of <br />insulating materials. <br />H. Primary Air Barrier – Self Adhered <br />1. Apply self-adhering air/vapor barrier membrane complete and continuous to prepared and primed <br />substrate in an overlapping shingle fashion and in accordance with manufacturer's <br />recommendations and written instructions. Stagger all vertical joints. <br />a. Prime surfaces as per manufacturers’ instructions and allow to dry. <br />b. Align and position self-adhering air/vapor barrier membrane, remove protective film and <br />press firmly into place. Ensure minimum 2 inch overlap at all end and side laps of <br />membrane. <br />c. Roll all laps and membrane with a counter top roller to ensure seal. <br />d. At the end of each days work seal the top edge of the membrane where it meets the <br />substrate with termination sealant. Trowel apply a feathered edge to seal termination and <br />shed water. <br />3.4 FIELD QUALITY CONTROL <br />A. Testing Agency: Owner will engage a qualified testing agency to perform tests and inspections and <br />prepare test reports. <br />B. Inspections: Air barrier materials and installation are subject to inspection for compliance with <br />requirements. Inspections may include the following: <br />1. Continuity of air barrier system has been achieved throughout the building envelope with no gaps <br />or holes. <br />2. Continuous structural support of air barrier system has been provided. <br />3. Masonry and concrete surfaces are smooth, clean and free of cavities, protrusions, and mortar <br />droppings. <br />4. Site conditions for application temperature and dryness of substrates have been maintained. <br />5. Maximum exposure time of materials to UV deterioration has not been exceeded. <br />6. Surfaces have been primed, if applicable. <br />7. Laps in strips and transition strips have complied with minimum requirements and have been <br />shingled in the correct direction (or mastic has been applied on exposed edges), with no <br />fishmouths. <br />8. Termination mastic has been applied on cut edges. <br />9. Strips and transition strips have been firmly adhered to substrate. <br />10. Compatible materials have been used. <br />11. Transitions at changes in direction and structural support at gaps have been provided. <br />12. Connections between assemblies (membrane and sealants) have complied with requirements for <br />cleanliness, preparation and priming of surfaces, structural support, integrity, and continuity of <br />seal. <br />13. All penetrations have been sealed. <br />C. Remove and replace deficient air barrier components and retest as specified above. <br />DocuSign Envelope ID: 51195338-6F17-4D2B-B990-4A82329E7F4E