Solid wall insulation is an extra layer of insulation on an external or internal wall, while cavity wall insulation is injected into the space between the two layers that make up the external walls.
Internal wall insulation isn't for every home. While it's easy to assume insulating every surface in your home will lead to greater energy efficiency, it isn't the case with internal wall insulation.
That’s great news for your wallet and the planet. But 9 out of 10 homes in the U.S. are under-insulated, according to the Environmental Protection Agency (EPA), with older residences especially likely ...