Can spray foam insulation be applied to plaster?

Hello, I’m renovating an old Philadelphia rowhome that has no insulation on the exterior brick walls.I bought a DIY spray foam kit (one of those two-tank deals) to add thermal… Hello, I’m renovating an old Philadelphia rowhome that has no insulation on the exterior brick walls.I bought a DIY spray foam kit (one of those two-tank deals) to add thermal…Read MoreGreenBuildingAdvisor