The temperature at the vapor retarder shall be warmer than the dew point temperature for the vapor retarder to perform its designed function. When sandwich type construction is specified, the underlying layer of rigid board shall not be included in the R-value calculations for deriving dew point location. Also, the underlying layer of rigid board shall not be made from hydroscopic materials that may degrade from moisture.
Vapor Retarder Continuity from
Roof Plane through Flashings
Prevention of Asphalt Drippage
Vapor Retarder Damage
Construction roof traffic shall be restricted to prevent damage to the vapor retarder. In the event damage does occur, repair the vapor retarder damage with the same roof components and quantities as specified for the vapor retarder installation.
If roof insulation is installed under the temporary roof, the insulation shall be inspected for wet or damaged areas, so that such areas may be removed and replaced prior to installation of the Fields BUR membrane.If a Fields temporary roof is required, the bid documents shall specify:
When a temporary roof is specified as a vapor retarder, precaution shall be exercised in protecting the temporary roof from other construction tradesmen. Damage to the temporary roof may impair its effectiveness as a vapor retarder. If the vapor retarder is installed as a temporary roof during construction, the vapor retarder shall be examined, and if necessary, repaired to ensure watertight integrity prior to installation of the remainder of the roof system.
Vapor Retarder and Temporary
Roof Assemblies over High Humidity
Weather Protection during Installation
Tie-offs are temporary Fields BUR reinforcing sheets adhered to seal the roof system from moisture intrusion during construction. Tie-offs and temporary flashings are installed at roof openings and exposed flashings prior to the end of each day so as to protect the roof system from the entry of moisture. Tie-offs shall be removed prior to continuing installation of the roof system.
Roof Drains & Scuppers
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