Fort Bragg Roofing Inspection Sources Sought

The project is to inspect the existing roofing systems on various buildings throughout the installation. This work will include the inspection of existing roofs and provide a Roof Inspection Survey and Written Report. The following roof types and estimated square footage shall be considered for your firm’s capability: Roof Types/Square Footage Asphalt Roof Shingles/1,135,646 Built-Up Roofing System/4,560 Extremely Durable Synthetic Rubber Roofing (EPDM - ethylene propylene diene terpolymer)/525,190 Preformed Metal Roof/2,506,032 Slate Roofing/11,395 Standing Seam Metal Roof/1,144,239 TPO – Thermoplastic Polyolefin/293,880 Mixed Material Roofs/200,000 Total Square Footage Estimation for Consideration/5,820,942 The full details of the Performance Work Statement (PWS) are still being drafted; however, the below information depicts some of the tasks that will be required. A. Roof Inspection Surveys All roof drains and through wall scuppers should be checked to see that they are open and free of debris. The complete roof shall be checked for accumulated debris such as leaves, tree branches and foreign objects thrown or left on the roof. A walkover of the roof shall be made to examine for cracks, punctures, penetrations, coating blisters, foam blisters, or delamination of either foam or coating. The roof surface should also be carefully examined for any unusual signs of wear, erosion or flaking of the coated surface. Flashing around drains, equipment, roof vents, stacks, hatches, along roof edges and parapet walls should be examined for cracks or loss of adhesion of foam, coating or plies. Expansion joints, if existing, should be inspected along curbing details to insure that no structural movement has taken place outside the expansion joint area resulting in cracks in the roofing system. Peripheral items that are not a direct part of the roofing system that shall be checked during an inspection are integrity of metal copping flashing in parapet walls, the masonry parapet walls themselves to see if they are free from structural cracks that might permit water entry into the building or behind the applied roof system, and seals or caulk joints on sky-light units. Surface contaminants like oil spills shall be monitored for adverse effects on membranes and coatings. Subsurface contamination: If from inspection, it is established that a roof has been leaking for some time, the insulation and substrate should be checked for moisture contamination. This can be done by using either a two-inch diameter core sampler, or a non-destructive moisture tester, either nuclear, infrared, or capacitance type, which indicates the moisture content of the substrate. The core sampler removes a cylindrical core of the roof membrane and insulation. The sample is weighed wet, then dried in an oven and weighed again. The quantity of moisture per cubic foot of insulation can thus be calculated. B. Written Report requirements, but is not limited to the following: Roofing system performance history description. Description of existing roofing system condition and visual observations of all exposed roofing components. Roofing cores sampling and location within the roof, and testing to determine system components, and roofing system type. Inspection for subsurface moisture contamination with Infrared Equipment, provide thermograms and exact location within the As-Built roof plan drawing. Sampling with exact location in the roof plan, Laboratory Testing, and Test Report for roofing Asbestos Containing Material (ACM) only if requested by the Contracting Officer in the delivery order due to previously Contractor’s Report recommendations. Photographs of roofing system conditions and area location where they were taken, including interior structural components, and ceilings providing the capability of having a database or software to compile to the government.

Division 01 -	General Requirements, Quality Control, Testing and Inspecting Services.
Division 07 -	Thermal and Moisture Protection, Dampproofing and Waterproofing, Thermal Protection.