# Roofing permit ALT444684 at 320 Commonwealth Av, Boston

Boston Inspectional Services Department permit ALT444684: issued Jun 30, 2015 for roofing work at 320 Commonwealth Av. Remove and dispose of existing roof system down to existing wood decking. Install new pressure treated nailer at perimeter to match height of new insulation. Install 6mil Poly Vapor Barrier over existing wood decking to meet MA building code. Install Polyisocyanurate insulation boards mechanically fastened with approved roofing plates and screws. Install Firestone 0.60mi black EPDM Membrane over newly installed insulation. Membrane will be fully adhered. Dismantle and dispose of existing roof top deck area. Construct new roof top deck to match existing with pressure treated lumber as directed in Engineered plans.

- Permit number: ALT444684
- Issued: Jun 30, 2015
- Type of work: Roofing (city: Roofing, Long Form/Alteration Permit)
- Status: Finished (city: Closed)
- Reported cost: $40,005
- ZIP code: 02115
- All permits at this address: https://nearbypermits.com/boston/address/320-commonwealth-av/

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Source: Boston Inspectional Services Department permit data (https://data.boston.gov/dataset/approved-building-permits). Checked 2026-10-05 19:14 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

Every permit at 320 Commonwealth Av: https://nearbypermits.com/boston/address/320-commonwealth-av/