S PRI NG 2014 IN THIS ISSUE: FEATURES Soprema ‘test lab’ roof answers roof colour questions .....................1 Member profile: “Call one guy” – GRC Columbia................ 12
THE VOICE OF PROFESSIONAL ROOFING CONTRACTORS
Vol. 11, No. 1 • SPRING 2014
ASSOCIATION President’s message..................... 3 Top Line acknowledged ............. 11 Stay On Top returns in June...... 14 Roofing BC marks 10 years ...... 16 INDUSTRY NEWS Architects planning challenging high-rise roofs ............................... 6 27 acre roof being designed ..... 10 Delta roof takes 2500 tons of rock ................................. 10 ‘V4’ LEED launched .................. 15 CASMA celebrates 25 years ...... 15 Project Shop Class kicks off....... 16 CGC partners with Enercorp...... 16 Green roof seminar planned...... 16 YVR outlet to get metal roof...... 17 Fraudulent roof claims up.......... 18 Construction outlook positive.... 18 BC capital spending cut ............. 18 BC joins Job Grant program ...... 19 Towers leading Metro permits .. 20 Canada Building Fund lauded... 20 Oakridge Centre expanding....... 21 COLUMN Legal Affairs: Employment contracts save legal woes ......... 22
The roof of the Soprema plant in Chilliwack was turned into a giant lab to test the energy performance of cap sheet colours and insulation. Photo: Soprema
“Call one guy” RCABC contractor member GRC Columbia ‘does it all’. See page 12
Black, white & insulation Chilliwack roof study tests insulation and answers a black and white question By Frank O’Brien
The roof of the Soprema plant in Chilliwack does more than cover one of BC’s largest roofing material manufacturers – it is also a large lab that may answer some hoary questions about energy performance. As the roof was being
constructed, RDH Building Engineering Ltd., Roxul and Soprema undertook a field monitoring study. SMT Research installed and monitored sensors and data-logging equipment. Building Science Labs provided the ASTM C518 material testing. The study was implemented to measure the impacts and benefits of membrane colour (white, grey and black) and insulation strategy on the performance of conventional roofing assemblies.
The finished roof, showing all three colours of cap sheet
The same roof membrane type – 2-ply SBS from Soprema – with three different surface granule colours was placed over three different conventional insulation strategies, creating a total of nine unique roofing assemblies (nine square in size) on the same
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building. The thicknesses of the different insulation products were varied to achieve approximately the same R-value for each of the roof assemblies. Sensors were installed to measure temperature, relative humidity, moisture content, and Insulation continued page 4
Stay On Top Steep slope roofing symposium returns in June. See page 14