Title: Wind uplift pressures of 2001 Company Wind Vented/ Negative Pressure Roofing System according to CSA A Report No: B1456.

Transcription

1 National Research Council Canada Institute for Research in Construction Ottawa, Canada K1A 0R6 Conseil national de recherches Canada Institut de recherche en construction Testing Report Title: Wind uplift pressures of 2001 Company Wind Vented/ Negative Pressure Roofing System according to CSA A Report No: B Report Date: February 4, 2013 Proponent: System Installed by: 2001 Company Thomas L. Kelly System Tested by: Report by: Steven Ko Pascal Beaulieu Report Approved by: Suda Molleti, Ph.D Please note our general conditions below. The indicated test data are valid under test conditions only. A successful application under other than the reported test conditions is not proven with this test report. This report is the intellectual property of the National Research Council of Canada (NRC) and must be copied as a whole only. It is only allowed to be published with the written permission of NRC.

2 ROOF SYSTEM COMPONENTS CONTINUE: RE-ROOFING SYSTEM Other Details A re-roofing system was constructed on top the System 1 For pressure equalization, EPDM membrane of System 1 was cut along the cement board joints The re-roofing system comprised of two configurations: - On a 12 x 12 (3.66m x 3.66 m) area of System 1, insulation was loose laid on top the existing membrane and cement board was loose laid on top the insulation - On a 12 x 11 ( 3.66 m x 3.35 m) area of System 1, fire guard mat was loose laid on top the existing membrane The re-roofing system was completed by installing a new 60mil non-reinforced membrane on top the cement boards and fire guard mat In order to prove 2001 Company Wind vented/ Negative Pressure Roofing System able to remove the moisture under the membrane, 23 liters of water was poured on top the pre-weighed fire guard mat before the dynamic test. At the perimeter,epdm membrane was adhered to vapor barrier with 2001 bonding contact adhesive and 1 (25 mm) butyl gum as the membrane edge sealing technique 2 ½ (64 mm) diameter round hole was cut from the top of the re-roofing membrane to simulate as a valve for pressure equalization The wet fire guard mat was weighed after 12 hours dynamic test to find out how much water was removed during the testing.

3 INSTRUMENTATION LAYOUT (Not to Scale) 8 (2.44m) 2.5 inch (64 mm) hole 12 (305mm) D1 D2 16 (4.88m) 50 (1270 mm) 4 (1.22m) Pressure Tap 1 Deflection sensor 1 & 2

4 Time Histories 200 Suction pressure, psf Time, sec

5 Appendix A: System Installation Process System 1 Concrete deck 2-ply Mod. Bit. membrane as vapor barrier Insulation boards were loose laid on top of the vapor barrier ½ (13 mm) thick Perma Base cement boards

6 Cement boards were loose laid above the ISO 2001 Company EPDM Bonding Adhesive Bonding adhesive was applied to the membrane and cement board. After few minutes of drying until the adhesive was tacky to touch, the membrane was adhered to the cement board Membrane seam overlapped with 6 (152 mm) EPDM seam Tape

7 At the perimeter, the EPDM membrane was adhered to vapor barrier with 2001 bonding contact adhesive and 1 (25 mm) butyl gum, and then a termination bar was fastened with 1 ½ (38 mm) zinc nail in rivet at 7 (178 mm) o/c as the membrane edge sealing technique Completed System 1

8 Appendix B : System Installation Process Moisture Removal Concept on a Re-roofing System For pressure equalization, EPDM membrane of System 1 was cut along the cement board joints The re-roofing system comprised of two configurations On a 12 x 12 (3.66m x 3.66 m) area of System 1, insulation was loose laid on top the existing membrane and cement board was loose laid on top the insulation On a 12 x 11 ( 3.66 m x 3.35 m) area of System 1, pre-weighed fire guard mat was loose laid on top the existing membrane 23 liters of water was poured on top the fire guard mat

9 The re-roofing system was completed by installing a new 60mil non-reinforced membrane on top the cement boards and fire guard mat Completed System ready for testing System during dynamic testing Weighing of the fire guard mat after the dynamic testing

10 System: The 2001 Co. Wind Vented Roof System, loose laid, on two existing wet roofs on a concrete deck. Test: LSA A Moisture Removal Concept with a 3 rd roof installed. System Components: 2001Co. Wind Vented roof over a single ply roof over a built up roof concrete deck. System Layout: The re-roof system was completed by installing a new 60mil non-reinforced membrane on top of the cement boards and fire guard mat. Time lapse: between construction + system test = May 11, May = 1 day Air temp of test: +,- 20⁰C, 68⁰F Measure sustained (suction pressure:) -285 psf Initial weight of Fire Guard Mat after adding 23 liter of water 78lbs = 28.5lbs + 50lbs water Final weight of FG Mat 66.5lbs = 28.5lbs + 38 water after 12 hours dynamic suction test 76.5 = = lbs water or 24% moisture reduction