Rigid foam is the best insulation for rim joists.
Best insulation for basement ceiling joists.
As you complete the installation there will be a reduction of noise within rooms and external areas.
To answer an implied question how would you get the floor warm if you insulated the basement ceiling.
It generally comes in rolls like fabric and is usually made in widths that match standard stud and joist spacing.
Blanket insulation may be made of fiberglass mineral wool other natural fibers or plastic fibers.
First you ll have to maneuver batts of insulation around the clutter of wires pipes and cross bracing in a typical basement ceiling.
Hold the batts in place by stapling their paper faced vapor retarders to the lower edges of the joists.
We chose 2 in thick r 10 extruded polystyrene don t use expanded polystyrene which is a less effective air and moisture barrier.
Cut the foam into 8 ft long strips 1 8 in.
Fiberglass is a type of insulation that originates from tiny glass fibers.
Moreover you can install it to insulate walls as well as crawl the spaces.
Then install rigid foam board insulation with all the seams taped like this illustration credit to building science.
This type of insulation is recommended for unfinished ceilings and has the advantages of being easy to install and flexible.
Insulating the basement ceiling will keep most of the heat upstairs in the living space.