• Loose-Fill Insulation in Walls
  • Must not settle after installation
  • Covered by a membrane that can be seen through
  • Must not bulge or interfere with interior finishes
  • Do not add water unless it will not affect other materials in the wall

• Water repellent loose-fill insulation can be used between courses in masonry cavity walls.

9.25.2.4.(4) Where blown-in insulation is installed in above-ground or below-ground wood-frame walls of new buildings,

a) the density of the installed insulation shall be sufficient to preclude settlement,

b) the insulation shall be installed behind a membrane that will permit visual inspection prior to the installation of the interior finish,

c) the insulation shall be installed in a manner that will not interfere with the installation of the interior finish, and

d) no water shall be added to the insulation, unless it can be shown that the added water will not adversely affect other materials in the assembly.

9.25.2.4.(5) Water repellent loose-fill insulation is permitted to be used between the outer and inner wythes of masonry cavity walls .

Note: A "wythe" is a vertical section of bricks or other masonry that is one unit thick.