EXHIBIT 99.1
JOINT FILING AGREEMENT
The undersigned hereby agree that this Statement on Schedule 13G with respect to the beneficial ownership of shares of Common Stock of SG Blocks, Inc. is filed jointly, on behalf of each of them.
Dated: February 14, 2019
| Hillair Capital Investments L.P. | |||
| By: | /s/ Sean M. McAvoy | ||
| Name: | Sean M. McAvoy | ||
| Title: | Authorized Signatory | ||
| Hillair Capital Management LLC | |||
| By: | /s/ Sean M. McAvoy | ||
| Name: | Sean M. McAvoy | ||
| Title: | Authorized Signatory | ||
| /s/ Sean M. McAvoy | |||
| Sean M. McAvoy | |||