Auburn University
Auburn University
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Auburn University
 


B30 - Roofing

  1. General

    1. Pitched roofs are strongly preferred over low slope roofs.  Low slope roofs are only acceptable when the building expanse is too great for a pitched roof to be practical or when there is an addition to an existing building with a low slope roof.


    2. Low slope roofs are those roofs whose slope is between ½ :12 and 2:12; roofs with a greater slope are considered to be pitched roofs.


    3. When determining the roof pitch and general design of roofs for new buildings consideration must be given to coordinating the design with the surrounding buildings.


    4. The roofing manufacturer shall submit a certification of intent to warrant pending proper installation and the contractor shall be approved to install the chosen roofing system.


    5. No exposed fasteners on metal roof panel surfaces.


    6. Insert the following in the Supplementary General Conditions of specifications involving roofing of existing structures:  “The Contractor shall be responsible for all repairs of water damage to the building, including furnishings, occurring during the construction phase of the project. The Designer shall survey, in the presence of the owner and contractor, any existing water damage prior to construction and prepare a written and photographic record of this survey with copies distributed to both the owner and contractor.



  2. Low Slope Roofs


    1. When low slope roofs must be used, they will have a minimum slope of  ½ inch per foot and shall be 4 ply modified bitumen.  Acceptable manufacturers include GAF, Tamko, and Manville/Schuller.


    2. All low slope roofs must carry a 20 year, no dollar limit warranty.


    3. The manufacturer of the roof covering must submit a letter to the University Architect certifying that the entire roofing assembly is compatible.


    4. Extra slope to roof drains shall be provided two feet around the drain. Roof drains shall be kept protected from debris.


    5. Prior to final inspection, the contractor shall conduct a flood test of the roof in the presence of the designer and the owner to verify drainage.



  3. Pitched Roofs


    1. Asphalt shingles installed over an ice and water shield is the preferred roof covering for pitched roofs.


    2. Acceptable Asphalt shingle manufacturers include:


      1. GAF- Slate Blend


      2. Elk- Antique Slate (Prestique)


      3. Tamko- Antique Slate / Oxford Gray


      4. or approved equal


    3. The Designer shall incorporate built in personnel tie-off points into the roof design for the purposes of construction and maintenance.  Use dark bronze in color.



  4. Roof Openings


    1. If the lowest point of the roof is not accessible within thirty feet of the ground, a rooftop hatch or door must be utilized to facilitate maintenance.


    2. Stair doors opening onto roofs or into mechanical penthouses shall be equipped with a self locking lockset having free lever on the roof or mechanical area side with access by key only.


    3. In the case of doors opening onto roofs, closers shall be mounted out of the weather and door shall be equipped with overhead stop.


    4. Roof access must be as safe as possible. Ladders inside closets are not acceptable for roofs with equipment that requires maintenance. Code compliant permanent stairs must be built into the structure for all such access. Consideration shall also be given to accessing different roof levels.


    5. Provide safe rooftop access for large, heavy loads.



  5. Roof Mounted Equipment


    1. Avoid roof mounted equipment where possible.  Mount fans in fan rooms in attic spaces of steep sloping roofs.


    2. Where unavoidable, fume hood fans, motor starters and other roof mounted equipment shall be installed on fully flashed raised curbs. When roof mounted equipment can not be set on curbs, allow 18 inches clearance minimum to facilitate repairs and reroofing.


    3. Specify manufactured equipment curbs for all roof mounted equipment.
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