b'Ventilationwas in the roof cavity, it could not beThe Need for Furthertechnical/librarydetail/blIW17S8. Benoit,M.andR.Gratton.cludesbuildingenvelopeinspection,evacuated effectively. Research rmKM=. 1991.PignonsurrueLestechnical investigations and analyses Therefore,themainsolutions2. Rowley, F. B., A. B. Algren andquartiersdeMontral.Mon- of building envelope deficiencies and Withthegoalofdeveloping proposedforthisprojectweretoclear guidelines for effective roofC. E. Lund. 1941. Condensationtreal, QC: Gurin diteur. assemblyfailures.Antoniohasalso conduct localized repairs at the defi- ventilation, our team is collaborat- ofMoistureandItsRelationto9.Forgues,Y.E.1985.TheVen- conductednumerousfaadecondi-cient bathroom fan, introduce freshingwithotherconstructionandBuilding Construction and Opera- tilationofInsulatedRoofs.tionsurveysandsafetyinspections, air into the roof cavity via side inletengineering professionals and uni- tion. Bulletin no. 18 of the Uni- Ottawa,ON:NRCC.doi. has participated in field performance ports placed within the masonry andversityresearcherstofurtherin- versity of Minnesota Engineeringorg/10.4224/20375156. compliancetestingofbuildingen-increase the cavity depth by raisingvestigate ventilation requirementsExperiment Station. conservancy. velope assemblies and has served as the roof deck. for buildings with flat roofs. Theumn.edu/handle/11299/124254. About the AuthorsBelvedere 3. USFederalHousingAuthorityDomenico DAmato, Eng., isexpert witness. Additional experience intentistoundertakefull-scaleincludesdataacquisition,instru-In August 2017, our firm inves- tests to determine adequate ven- (FHA). 1942. Property Standardsa project engineer with nearly ninementation,researchanddevelop-tigatedrecentmoistureaccumula- tilationstrategiesforflat-roofand Minimum Construction Re- years of experience in building en-tion within the upper roof cavity ofwoodconstruction. quirementsforDwellings.Wash- velopeconsulting.Domenicohasment,andequipmentprocurement a newly remodelled residence in theAn exterior test structure is be- ington, DC: FHA. performedandassistedinmul- and development.WestmountboroughofMontreal.4. NationalResearchCounciltiple faade safety inspections, con- DomenicChiovitti,Eng.,is ing designed to the size of a small, During an initial site visit, high hu- one-storey,wood-framedhouseCanada(NRCC).1953.Na- ditionsurveysandinvestigationspresidentofChiovittiConsultants midity levels were measured at thewith the goal of studying the im- tional Building Code of Canada:of building envelope failures, withand specializes in building envelope upper-floorlevel(57-per-centtopacts of various ventilation strate- 1953. Ottawa, ON: NRCC. doi. some recent projects facilitated byconsulting. Domenic has over 35 years 58-per-centRH),andinvestigatorsgies and conditions. The structureorg/10.4224/40001291. aerial drone, thanks to his quali- of hands-on experience and has been observeddarkeningofthewood5. NRCC.1977.NationalBuild- ficationsinadvancedoperations. with a 32- by 24-ft. (9.8- by 7.3-m)recognized by the court as an expert framing and deck underside withinfootprintisdesignedtooptimizeingCodeofCanada:1977.Hisexperiencealsoincludesthein numerous cases and investigations the roof cavity. Also, the ducts fortheuseofconstructionmaterialsOttawa,ON:NRCC.doi. reviewofarchitecturaldrawingswith regard to envelope performance bathroomfanexhaustswerenotand to facilitate the evaluation oforg/10.4224/40001638. with regard to the building enve- failures.Specializationsincludeon-equippedwithbackdraftdampersvariousroofventilationschemes.6. NRCC. National Building Codelopeofproposedprojects,on-site sitequalitycontrolmonitoringfor andwereimproperlyterminated,In addition, the impact of variousofCanada:2020.Vol2.Firstqualitycontrolmonitoringandnew and renovated structures, review and the polyethylene vapour barrierroof cavity configurations (that is,printing.Ottawa,ON:NRCC.hygrothermal modelling of build- of building envelope design and speci-was not sealed at the recessed light- the depth and placement of insula- doi.org/10.4224/w324-hv93. ing wall assemblies. fications,andrecommendationson ingfixtureboxes.Duringsubse- tion) and parapet heights will also7.Leduc,M.andD.Marchand.AntonioRenzullo,Eng.,is quent investigations, the team notedbe evaluated. 1992.LesMaisonsdeMon- vice president of Chiovitti Consul- materials,componentsandsystems. that the top-floor mechanical systemAn initial phase of monitoringtral.Montreal:Gouvernementtantswith22yearsofexperienceDomenicroutinelyperformscondi-was oversized and cycled excessively,and data collection within the roofduQubecMinistredesaf- inthefieldofbuildingenvelopetionassessmentsandpre-purchase not allowing sufficient time for thecavity is planned for winter 2024- fairesculturelles. consulting.Hisspecializationin- audits and provides expert testimony.dehumidification of the interior air2025. An understanding of the var-during cooling. iousventilationfactorsandtheir Thecharacteristicsoftheroofeffects on the roof cavity behaviour weresuchthatthethicknessofwill be obtained during this phase. the air space varied between 7 andIf weather conditions permit, basicNew OIRCA Members10 in. (175 and 250 mm), and theventilation configurations will also roof ventilation was limited to fourbe analyzed. Additional configura- The OIRCA Board of Directors is pleased to welcome the following new members:well-distributed,single-bladerooftions will be analyzed in depth dur-ventilators.Aspartofthestrategying the following winters.toaddresstheproblems,sideinletOur investigations have identi- Tektum Consulting Group Inc. (Consultant Member)ports were incorporated within thefiedthatproblemsexistwiththe1250 South Service Rd., Unit A2-2Kevin Voorberg masonrywalltointroduceoutsideventilationofflatroofsandthatStoney Creek, ONL8E 5R9info@tektumgroup.com airintotheroofcavityandavoidresearch is required to establish ef-depressurizationduringnormalfectiveventilationstrategies.TheTel: 866-223-9980www.tektumgroup.comoperatingconditions.Inaddition,goal of our research is to provide manymodificationsregardingthepractical information that can be mechanicalsystemswererecom- implementedwithinthehous- Canadian General Tower (Associate Member)mended;theserecommendationsingindustry. 52 Middleton St.Jordon Scott included modification of the HVAC system (to reduce cycling and mini- References Cambridge, ONN1R 5T6jordon.scott@cgtower.com mize internal pressurization), repairs1. Rose, W. B. 2002. Early HistoryTel: 519-623-1633www.cgtower.com to the bathroom exhaust fan ductsof Attic Ventilation. National and repairs to the discontinuous va- RoofingContractorsAsso-pour barrierinstallations. ciationwebsite.www.nrca.net/ HB Consultants (Consultant Member)130 Albert St., Suite 420Hardeep Bhuller Ottawa, ONK1P 1B1hbbhuller@hbexperts-cunseils.ca Tel: 514-882-6463www.hbexpert-cunseils.caServing Southwestern Ontario Since 1972 RDA Roof Vacuum Experts Inc. (Affiliated Contractor Member) Commercial 151 Norfinch Dr., Unit 3Rui Da CostaIndustrial Maintenance Specialists North York, ONM3N 1Y2info@rdaroofvac.rocks Free Estimates / Inspection Tel: 647-985-5411www.rdaroofvac.rocks152 Thames Rd. W., Exeter, Ont. N0M 1S3 Tel: (519) 235-2802Fax: (519) 235-1532Email: speat@hay.net20ONTARIO ROOFING NEWSISSUE 1 2024 THE ONLY SOURCE FOR PROFESSIONAL ICI ROOFING CONTRACTORS IN ONTARIO ORN'