Construction Type: New Construction
Type of Contract: Lump Sum
Size of Project (SF): 20,000
Contract Magnitude: Medium ($500K – $1M)
Duration of Project: 14 Months
Percentage of Self-Performance: 100%
Work Performed
Harbor Roofing and Waterproofing was awarded the subcontract for the roofing work on The Clara on MLK in March of 2022 for fellow ABC member Hamel Builders, Inc. of Washington, D.C.. Harbor’s scope included the installation of membrane roofing, concrete pavers, and green roofing that would take fourteen (14) months from commencement to completion.
The procurement for this project occurred initially during the post-COVID supply chain issues, where material costs in the commercial roofing industry doubled and insulation that would normally be available within a week would take up to twelve months for delivery. Without the insulation available in time to install the roof, Harbor worked with Hamel and the architect to put together an unorthodox system of expanded polystyrene insulation with gypsum coverboard to deliver a roofing system with proper slope that could be constructed on schedule.
The wood construction provided a wood roof deck, where the aforementioned expanded polystyrene system and coverboard were installed with a white TPO membrane system. Membrane systems must be electronically tested if a green roof is to be installed atop it, requiring a conductive component to be added into the roofing system.
The green roof on the project was provided by Green Roof Outfitters (GRO). The GRO system in this case was comprised of a modular tray system. The tray system differs from most of the green roof systems as the green material (engineered media, drainage layer(s), air layer(s), and plants are pre-installed in to engineered trays that provide the root barrier (that prevents the plant roots from growing and puncturing the roofing membrane). The advantage to the modular approach used in the tray system is that the green roof can more easily be removed and set aside for future maintenance. With standard systems, the green roof would need to be removed and set aside in what you could call “peeled back layers.” One challenge experienced with the green roof was that the thickness of the green roof was changed to a much thicker module within a short time period prior to installation.
Harbor also installed Henry Company 790-11 system with an elevated pedestal and paver system from Hanover Architectural Products at the courtyard. This type of installation is called an IRMA (inverted roof membrane assembly) where the roof membrane is installed on the bottom, and the other components of the system are installed on top. This is sometimes referred to as an “upside down roof.”
This project is unique to Harbor due to the numerous systems we installed during chaotic market turbulence where the project team was able to use creativity and “outside the box” thinking to provide a constructable solution for the customer.
Harbor Roofing and Waterproofing was awarded the subcontract for the roofing work on The Clara on MLK in March of 2022 for fellow ABC member Hamel Builders, Inc. of Washington, D.C.. Harbor’s scope included the installation of membrane roofing, concrete pavers, and green roofing that would take fourteen (14) months from commencement to completion.
The procurement for this project occurred initially during the post-COVID supply chain issues, where material costs in the commercial roofing industry doubled and insulation that would normally be available within a week would take up to twelve months for delivery. Without the insulation available in time to install the roof, Harbor worked with Hamel and the architect to put together an unorthodox system of expanded polystyrene insulation with gypsum coverboard to deliver a roofing system with proper slope that could be constructed on schedule.
The wood construction provided a wood roof deck, where the aforementioned expanded polystyrene system and coverboard were installed with a white TPO membrane system. Membrane systems must be electronically tested if a green roof is to be installed atop it, requiring a conductive component to be added into the roofing system.
The green roof on the project was provided by Green Roof Outfitters (GRO). The GRO system in this case was comprised of a modular tray system. The tray system differs from most of the green roof systems as the green material (engineered media, drainage layer(s), air layer(s), and plants are pre-installed in to engineered trays that provide the root barrier (that prevents the plant roots from growing and puncturing the roofing membrane). The advantage to the modular approach used in the tray system is that the green roof can more easily be removed and set aside for future maintenance. With standard systems, the green roof would need to be removed and set aside in what you could call “peeled back layers.” One challenge experienced with the green roof was that the thickness of the green roof was changed to a much thicker module within a short time period prior to installation.
Harbor also installed Henry Company 790-11 system with an elevated pedestal and paver system from Hanover Architectural Products at the courtyard. This type of installation is called an IRMA (inverted roof membrane assembly) where the roof membrane is installed on the bottom, and the other components of the system are installed on top. This is sometimes referred to as an “upside down roof.”
This project is unique to Harbor due to the numerous systems we installed during chaotic market turbulence where the project team was able to use creativity and “outside the box” thinking to provide a constructable solution for the customer.
Testimonial
“Harbor Roofing and Waterproofing was a fantastic partner on this project…”
-Shane Wolter, Hamel Builders