Sustainability in Affordable Housing Renovation for CSNDC – Boston, MA
Sorensen Partners is Architect for the $13.8M rehabilitation of 59 units of affordable housing for CSNDC in Boston, MA, which began construction in 2021. The development consists of six masonry buildings at two sites – Waldeck and Orlando – in Dorchester and Mattapan. Following is a list of green, sustainable, and climate resilient design characteristics of the rehabilitation.
Energy Efficient Envelope Design.
- All windows replaced for all buildings with Pella Impervia CL fiberglass with LowE dual-pane insulating glass, U-factor 0.29.
- Waldeck roofs will be upgraded from R-30 to R-52 through addition of spray foam insulation in the roof joists.
- Waldeck basement ceilings insulated with R-30 batt insulation and rim joist sealing.
- 25 Orlando roof upgraded from R-24 to R-49 through the addition of 5 inches of rigid insulation. Cool roof (white Duro-Last PVC) installed.
- 31 & 35 Orlando roofs upgraded from R-25 to R-55 through the addition of R-30 batt insulation in the attics.
- Exterior doors replaced with new gasketed doors.
Efficient Building Systems.
- Gas service installed at Orlando, providing an efficient and cost-effective heat source.
- All new high efficiency gas-fired boilers and gas-fired stand-alone water heaters installed.
- New insulated HHW distribution piping and plumbing piping installed.
- New low-flow toilets installed.
- Water-reducing showerheads and aerators installed.
- New electrical panels installed.
- New electrical wiring installed at Waldeck.
- All new LED lighting installed.
Healthy Indoor Air Quality.
- Ducted range hoods installed.
- Gas stoves replaced with electric stoves.
- 2-speed kitchen fans installed, set to operate in continuous background ventilation mode.
- 2-speed bathroom fans activated by light switch installed.
- 2-speed fans are set for continuous low-speed operation to provide adequate air recirculation.
- Low-VOC paint and surface materials used.
- Unit front and rear doors replaced with new gasketed doors.
- Stormwater recharge systems installed at both sites.
- Orlando stormwater recharge is assisted by a new infiltration bio-swale.
- All plants installed are native plants, and drought-tolerant plants where possible.
- Bike racks provided.
- Asphalt replaced with concrete pavers, gravel, and native plants at Waldeck. The overall impervious surface area is substantially reduced at the Waldeck backyards.
- Community garden beds provided at Orlando. These beds extend a community gardening initiative started in the last 5 years at the southwest end of the site, at the end of Orlando Street.
On-site Clean Energy Systems.
- All roofs made solar-ready through installation of an additional dedicated electrical panel; and installation of conduit to roof for use in future solar installation.
- 25 Orlando roof has been evaluated by structural engineer for 60% possible future coverage with solar panels.
- Power will be purchased from a utility providing clean energy.
Certified Exemplary Energy Performance.
- We used the Enterprise Green Communities criteria in the design process and conducted two community charettes with funding from Enterprise: a Green Grantat Orlando and a Health Action Planat Waldeck. During both of these charettes, elements of the Enterprise Green Communities criteria were discussed with residents and added to design plans when support was high.
- 5% of units will be Group 2 units. By MAAAB variance, all accessible units will be at Orlando.
- Common laundry rooms will be fully accessible at both sites.
- New community room at Waldeck will be fully accessible.
- ADA path of travel is clearly marked and centrally located.
- Universal design has been taken into account with ample site lighting at entrances.
- Universal design has been taken into account with locations for new intercom systems and mailboxes.