b"SOLAR REFLECTIVITY (in collaboration with Evoke Buildings Engineering)toreviewthesubject roof,formulateaninvestigativeplan, S1 - Control Roof (exist) and then install monitoring equipment, S2 - Wall Stripping collect temperature data and model the effectsofreflectedsolarradiationon SBS-modified bituminous membranes.S3 New Cap Sheet MembraneProjectparametersandoutcomes (black, Brown, Grey White) werecollaborativelydevelopedby S4 theRCABC,StructureMonitoring Technologies and Morrison Hershfield. S5 Theprojectwasdesignedtotestthe SE hypothesisthathightemperatures S6 causedbyreflectedsunlightfromthe clerestorywindowsadverselyaffected S11 - InsideS10 Glass Surface or even prematurely aged the exposed Bldg Temp roofmembrane,andtoestablishif S7 S9 - Sensor on Parapetmembrane surface colour, or the imposi-wall (ambient Temp) tion of a conventional overburden such Pavers on Pedestals 10 x 18' as concrete pavers or gravel, can mitigate the effects of reflected solar radiation.S8 Gravel ballast To collect desirable data, the RCABC S = Sensor Locationretained SMT to select and install moni-(approx) toringtemperaturesensorequipment. =Existing Drain The number and placement of sensors wasdiscussedbyallpartners,anda Figure 4: AERL southeast roof area test area and sensor plan (RCABC). data-controltemperaturesensorwas mountedonanunmodifiedportion oftherooffield.Sensorswerealso installed on the glazed surface, on the vertical membrane flashing beneath the glazingandontheinside(northwest face)ofthelongparapet(tocollect ambienttemperaturedata).Allfield sensors were placed along the center-lineoftheroof.Eachsolarradiation sensorwasaffixedtorigidinsulation; this approach isolated the sensors from the adjacent surface and allowed it to collect accurate air temperature. Surface temperaturesensorsweremounted directly on the roof membrane surface (Figure 4).Totesttheeffectsofmembrane colour,temperaturesensorswere alsoaffixedontopoffourdifferent membranecolours,eachtorch-ap-pliedtothetopoftheoriginalfield membraneblack,brown,greyand white. Finally, two equal-sized areas of the roof were covered with overburdenone area with pavers on pedestals, the other areas covered with round gravel (Figure4).Sensorsweremountedin the approximate centre of each test area Figure 5: AERL southeast roof area, showing the four test colours and, in the background, the paved and gravelled test areas (SMT). (Figure 5).24lROOFINGBC l SUMMER 2021"