Chapel Hill High School / Burnett Elementary School
At Chapel Hill High School, the existing modified bitumen roof system including roof insulation, bituminous flashings, gutter, downspouts, gravel-stop fascia, and other metal flashings are being removed down to the metal deck. The roof access ladders, wood blocking at gutter eaves are also being removed down to the top of the deck, as well as wood blocking gas line supports. Lead flashings, vent stack bases, and pipe flashing are also being removed. A new hot-mopped modified bitumen roof system with bituminous flashings, gutter, downspout, and metal flashings is being installed. New non-penetrating pipe supports are also being installed, and the roof areas are receiving new pre-manufactured access ladders.
At Burnett Elementary School, the existing modified bitumen roof system including roof insulation, bituminous flashings, gravel-stop fascia, coping, expansion joint covers, and other metal flashings are being removed down to the metal deck, lightweight insulating concrete fill, and structural wood fiber deck at the different roof areas. One-way vents used to dry the lightweight concrete are also being removed. Concrete gas line supports are being removed, as well as condensation lines and wood supports at HVAC units. The fiberglass gravity vents are being replaced with aluminum vents. Several abandoned curbs, supports, and pneumatic tubes are being removed and the deck openings closed. Primary roof drain at the lightweight insulating concrete fill areas are being replaced, and roof drains at the metal deck areas are being adjusted in height. Lead flashings, vent stack bases, and pipe flashing are also being removed. A new hot-mopped modified bitumen roof system with bituminous flashings, gutter, downspout, and metal flashings are being installed. New non-penetrating pipe supports are also being installed. Metal wall panels are being applied over a leaking wall, and base flashings are being extended up to behind upper roof area metal flashings to encapsulate other leaking walls. The existing gutter and downspouts are being reused.
The Owner did not receive approval to fund the project design until the first of February with a May construction start. The Design Team was able to produce the bidding documents for state review and 28 day bidding so that the Owner could prepare the bids to go before the two School Board meetings to adhere to the District’s approval process. Raymond Engineering assigned two drafters (one for each school). A senior review was performed upon each completed specification section. This accommodated the shortened timeframe and accelerated the design completion.
The gutters and downspouts for Burnett Elementary had recently been replaced. To save costs, our Design Team designed a longer gravel-stop fascia to extend into the existing gutters. The Design Team also designed metal wall panels to be installed over the brick, which provided a cost savings solution for leaking walls; likely due to through-wall flashing issues.