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Bids Invited to Coat NY School Roofs

Wednesday, March 6, 2013

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An Upstate New York school board is seeking bids to recoat two building roofs after infrared moisture analysis revealed that the current roof coatings were failing.

The project includes application of a spray-on polyurethane foam and a silicone finish coating. Bids are due March 28. A pre-bid conference is scheduled for March 14.

An infrared moisture analysis, which is used to identify moisture-damaged insulation, concluded that the roofs of two buildings within the Rockland County Board of Cooperative Educational Services were in need of new coatings.

infrared analysis
Thermo Group / Rockland County BOCES

The moisture analysis, performed by Thermo Group, revealed that the roofs of two buildings needed new coatings. Red spots in the thermal image (left) show moisture entrapped near mechanical equipment.

The Thermo Group of Hackettstown, NJ, performed the infrared moisture analysis on the 43,000 square feet of roofing using a FLUKE TiR32 infrared camera. The testing identified 79 anomalies in the existing coating system, with 2,699 square feet of insulation entrapping moisture for a total of 6.3 percent insufficient insulation.

Scope of Work

The contract involves spraying a two-component monolithic polyurethane foam roofing system onto the surfaces of buildings 1 and 2 within the district, according to the bid documents. The roof of building 1 is 19,000 square feet; the roof of building 2 is 24,000 square feet.

The roofs will be primed before applying the roofing system. Metal surfaces will be primed with a two-component, water-based rust-inhibitive coating. Non-metallic roof components will receive a single-component, water-based primer.

The polyurethane system is designed to be self-adhering and seamless, while providing high insulation levels. The foam should be at least one to one and a half inches thick when cured, unless tapering is necessary within an area to provide drainage, according to the documents.

image of roofs
Google

Spray polyurethane foam (SPF) will be used to coat two roofs at Rockland County Board of Cooperative Educational Services in West Nyack, NY.

A single-component silicone coating will be applied on top of the polyurethane foam roofing system, and is intended to act as a protective barrier against the weather. The silicone basecoat will be applied after the polyurethane foam has cured for at least an hour. If more than a day elapses after installation of the polyurethane foam, the area will have to be inspected for signs of UV degradation and oxidation.

Ceramic-coated roofing granules and low-dust roofing granules will be used to prevent skidding. Masking protection may be used to contain the areas to be painted.

About the Schools

The Rockland County Board of Cooperative Educational Services serves eight school districts. The program partners with the Board of Regents, the Commissioner of Education, and local school districts and communities.

Reported by Paint BidTracker, a construction reporting service devoted to identifying contracting opportunities for the coatings community.

   

Tagged categories: Bidding; Contracts; Government contracts; Spray polyurethane foam

Comment from Ashley McDuffee, (3/6/2013, 8:38 AM)

Does the scope of work involve removing the moisture-damaged insulation areas and moisture trapped in the existing roof assembly?


Comment from Brian Churray, (3/6/2013, 3:41 PM)

Ashley - yes, the specifications require that all roof decking must be properly cleaned and dried before refinishing, which includes replacing wet substrates and applying leveling foam to low spots where water ponds.


Comment from Paul Graham, (3/7/2013, 6:53 AM)

It sounds like a complete tear off for this to work. The temperature and humidity have to be perfect for foam installation.. 3 weeks in July? Good luck.


Comment from kevin scheid, (3/7/2013, 10:15 PM)

would anyone like a different solution to this problem given the issues with spray foam when the weather is not exactly right to spray the foam? Also no mention of exactly what the existing material(s) are on the roof at this time. this system that was specified seems a little less than i would expect from a quality specification. would a little help with that be appreciated?


Comment from Brian Churray, (3/8/2013, 2:51 PM)

Kevin - the polyurethane foam-silicone coating system that's specified is intended to match the current roofing system. Also, it's important to note that this article is just a synopsis of those specs, and shouldn't be used to determine the quality of the design work. If you'd like to assess that more directly, please check the documents on the owner's website at http://www.rocklandboces.org/services.cfm?subpage=1213442&adminActivate=1


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