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Technical bulletins

NRCA began issuing technical bulletins on an as-required basis in 1977 as a means of keeping the roofing industry informed of developing or late-breaking technical issues. In most instances, the bulletins have dealt with matters of special urgency or importance to the industry.

NRCA's technical bulletins are intended as addenda to the current edition of The NRCA Roofing and Waterproofing Manual. Information from past bulletins typically is incorporated into the manual's next edition or is withdrawn because the information no longer is relevant.

To date, NRCA has issued 20 technical bulletins. Relevant information from these bulletins has been included in the fifth edition of the manual.

The following technical bulletins apply to the first three editions of the manual.

• Bulletin 1, "The NRCA Technical Bulletin Program," Sept. 1, 1977
  
  


• Bulletin 2, "Equiviscous Temperature (EVT)," Dec. 15, 1977 (superceded by Bulletin 2A)
  
  


• Bulletin 2A, "Equiviscous Temperature (EVT)," not dated (supercedes Bulletin 2)
  
  


• Bulletin 2, "Equiviscous Temperature (EVT)," September 1988 (supercedes Bulletin 2A)
  
  


• Bulletin 2-91, "Equiviscous Temperature (EVT)," December 1991 (supercedes Bulletin 2, dated September 1988)
  
  


• Bulletin 3, "1977 Final Returns for Project Pinpoint," May 1, 1978
  
  


• Bulletin 4, "Interim Alert Bulletin," Aug. 10, 1978 (superceded by Bulletin 7)
  
  


• Bulletin 5, "Preparation and Release of Technical Bulletins," Dec. 26, 1978
  
  


• Bulletin 6, "Installation and Attachment of Layers of Insulation," March 24, 1980
  
  


• Bulletin 7, "Supercedes Bulletin 4," March 1, 1979 (superceded by Bulletin 9)
  
  


• Bulletin 8, "Thermal Performance Criteria for Roof Assemblies," Feb. 1, 1980
  
  


• Bulletin 9, "NRCA-RIC/TIMA Joint Statement on Blistering," July 1981 (superceded by Bulletin 9, dated September, 1988)
  
  


• Bulletin 9, "NRCA Statement on Polyisocyanurate, Polyurethane and Phenolic Foam Roof Insulations," September 1998 (supercedes Bulletin 9, dated July 1981)
  
  


• Bulletin 10, "NRCA-RIC/TIMA Position on Aged Thermal Value of Urethane Roof Insulation," July 1981
  
  


• Bulletin 11, "NRCA Recommendation on Selecting Urethane Roof Insulation," November 1981
  
  


• Bulletin 12, "NRCA Statement on Expanded Polystyrene Roof Insulation (EPS)," August 1982
  
  


• Bulletin 13, "Retention of Elasto/Plastic Roofing Products," August 1982
  
  


• Bulletin 14, "ARMA-NRCA-RIC/TIMA-SPRI Position on Rusting and Corrosion of Fasteners in Roofing Assemblies," February 1986
  
  


• Bulletin 15-91, "Corrosion Protection or New Steel Roof Decks," May 1991

The following technical bulletins apply to the fourth edition of the manual.

• Bulletin 98-1, May 1998, "Metric-Sized Ply Sheet"



• Bulletin 98-2, May 1998, "Ventilation for Steep-Slope Roof Assemblies"



• Bulletin 2000-1, March 2000, "ASTM Standards for Polymer-Modified Bitumen Sheet Products"



• Bulletin 2000-2, March 2000, "Fire Safety Considerations in the Design of Roof Systems"



• Bulletin 2000-3, March 2000, "Use of Cover Boards Over Polyisocyanurate Insulation"