Statement of Work.pdf
PDF 67 KB Posted
- Attached to
- Roof Repair
- Solicitation number
- 12505B20R0012
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Text version
DATE: 4/21/2020
SUBJECT: Statement of work for Building 20 Thermoplastic Polyolefin (TPO) roof repairs.
STATEMENT OF WORK: The USDA NCAH Building 20 located at 1920 Dayton Avenue, Ames, IA is in need of roof repairs on the Upper South Penthouse roof areas. The Thermoplastic Polyolefin (TPO) roof membrane has let loose from the insulation board and formed bubbles in the roof membrane that need to be repaired before the TPO membrane tears or breaks loose and creates a serious leak damaging items inside Building 20. Four bubbles of loose roofing are located on the rooftop of Building 20. Two bubbles are located in two locations with dimensions of 220’ X 12’ (Area 1) and 220’ X 12’ (Area 2) sections of roofing on a metal roof deck. The third lower roof bubble by the skylight edge (Area 3) will be covered with 100 linear feet 18” X 18” X 2” gray pavers on a concrete roof deck.
The fourth bubble (Area 4) with a dimension of 18’ X 24’ encompasses the entire west elevator penthouse roof section that is on a metal roof deck. A pdf drawing of the roof area is attached with the areas to be repaired cross hatched. The Contractor completing the TPO roof repair must be a Carlisle Roof System Approved Installer using approved Carlisle roof system components to maintain the existing Carlisle Golden Seal Roof Warranty that extends to 1/24/2024.
The Contractor is responsible for all labor, material, and crane rental to complete the work. The work required to repair the roof areas is as follows:
1. Fasten Rhinobond plates over the existing loose TPO roof membrane to the existing metal deck with screws a minimum of every 2 square feet as shown on the attached drawing.
2. Install new white 60 mil TPO membrane 12 feet wide and the length of both valleys and seal to the existing roof membrane, then heat weld the Rhinobond plates to the new white TPO roof membrane.
3. Install 5” white flashing over the tie in between new and old roof membrane on all four sides of both roof valley patches and any penetrations.
4. The lower roof area on the east edge of the Atrium skylights shall have 100 linear feet of 18” X 18” X 2” gray pavers laid in two rows along the skylight edge to hold down an existing location of a bubble in the roof membrane with rubber pads under the pavers.
5. The North and South Penthouse upper roof areas shall be inspected and any leaks found repaired by two roofers working for 5 hours.
6. The work shall be completed during normal business hours 7am to 4:30pm in favorable weather.
7. Contractor is responsible for the cost and coordination of a crane if necessary to move materials on and off the roof.
8. Contractor is allowed to use the freight elevator if necessary to move the pavers to the rooftop supervised by the COR.
9. The Contractor will provide two roofing Technicians to walk the Building 20 North and South upper Penthouse Rooftops to Inspect and repair any minor roof leaks and reattach approximately 20 lightning protection plates using white Vulkem to bond to the existing TPO roof membrane.
END OF DOCUMENT
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