Run the unfaced strips perpendicular to the.
How to install insulation in ceiling joists.
Purchase rolls or packages of insulation that will fit in the spaces between the ceiling joists.
Start at one edge of the crawlspace and install the insulation between the floor joists.
Align the front of the board with the face of the rafter or joist.
Make sure each run contacts the insulation you installed at the header band joists.
Joist bays the open spaces between floor joists are prime hosts for insulation under specific circumstances.
First you ll have to maneuver batts of insulation around the clutter of wires pipes and cross bracing in a typical basement ceiling.
How to install insulation between floor joists.
The standard width for joists is 24 inches.
Press the cut insulation board to fit between the rafters or joists.
If you want to install standard r 38 insulation.
Hold the batts in place by stapling their paper faced vapor retarders to the lower edges of the joists.
Set up a stepladder tall enough to work comfortably.
The insulation should fit snugly against the subfloor and between the joists.
The ceiling joist system is typically constructed from substantial two by tens or larger dimension boards but some older homes have smaller joists.
If your attic floor has no insulation install faced batts or faced rolls between each joist with the moisture barrier facing down against the drywall or plaster ceiling below.
If there is already insulation between the joists increase the r value by installing unfaced roll insulation right on top.
Leave an air gap between the roof sheathing and the board.
If using faced insulation keep the paper vapor retarder facing up and against the subfloor.