The furring strips should run vertically from floor to ceiling or from eaves to rafters if you are installing them on a sloped ceiling.
How to install insulation foam in ceiling.
Insulate the joists if your house doesn t already have a layer of insulation between the joists you ll need to install one before adding a layer over the joists.
About the only time you are likely to add rigid insulation to a ceiling is in a retrofit of a cathedral ceiling.
How to install ceiling insulation if you are a hands on homeowner with a diy approach to most things taking on the insulation of your home should be a fun project.
Install insulation between the joists and then secure plywood to the top of the framework with screws.
After the product sets up it has a rough texture that expands beyond the drywall barrier.
How to attach rigid insulation to ceilings.
During the installation of this particular spray foam the house begins to look like the set of a sci fi movie and protective gear is needed because the over spray can be harmful to lungs.
Use 2 1 2 inch deck screws to drive the furring strips into the foam and the wood framing beyond.
Regular ceilings are likely to be under.