b'PROJECT PROFILEensure water tightness while the rest of theto maximize energy efficiency and mix with building was being sealed, says Bourgault.the ecosystem and surrounding forest and Morrison Hershfield then tested the entireparkland. It will contain a highly efficient buildingforairtightness.Thiscreatedaheatingandcoolingsystem,triple-glazed hybridroofsystemwithanon-mechani- windows and an exterior designed to mini-cally fastened TPO roofing membrane thatmize heat gain/loss. The grounds will include protected a fully adhered and complicateda great lawn, community garden, outdoor sloped insulation package. playground and sports court.Efficient building The goal of the (CHCC) facility is to Managed by Turnbull Construction Projectleverageserviceintegrationandpromote Managers, with the construction handled byconnectivity, resulting in a barrier-free, flex-EllisDon, the 76,000-square-foot facility wasible and adaptive space for all community designed by HCMA Architecture + Designmemberstoenjoytogether,saidSurrey Passive House standard. This was our first time working on a Passive House building, and the experience was very enlightening, saysChrisBourgault,roofingmanagerat FlynnCanada.Ourcrewworkedvery closely with the other trades on the project to ensure the strict requirements of the standard were properly met.To be certified, the building needed to meet air leakage limits and be designed to ensure no energy is wasted. This made the roof of the building challenging in that the steel substructure of the roof deck was flat with no slope. The air seal between the roof, walls and cladding needed to be made as tight as possible to meet the near zero air leakage requirements from the standard.We changed the original specified vapour barrier for the roof from a self-adhered [one] to a more robust torch applied [variant] to www.rcabc.org l17'