Wall Insulation in Greenwood, IN

Wall insulation is the hardest part of an older house to fix and one of the easiest in new construction. Many homes around Greenwood built before the 1980s have walls with thin batts, slumped insulation or none at all in some bays. Newer homes usually have batts that leave gaps around outlets, wiring and framing. The method depends on whether the walls are open or closed.

Closed walls in existing homes

When the drywall or plaster stays in place, we dense-pack cellulose or fiberglass through small holes drilled in each stud bay, from inside or outside under the siding. Packed tightly, it fills the bay and slows air movement. HomeGuide lists blown-in wall insulation at $1,900 to $7,800, or $1.10 to $3.70 per square foot, and dense-pack cellulose at $1.60 to $4.20 per square foot. Holes are plugged and patched afterward.

Open walls in additions, remodels and new builds

With the studs exposed, spray foam is the strongest choice. Open-cell foam fills the bay and seals around boxes and wires at a lower price. Closed-cell foam reaches higher R-values in less depth and adds rigidity. The 2020 Indiana Residential Code lists R-20 or R-13 plus R-5 continuous for wood-frame walls in Zone 5. Fixr lists spray foam in new construction at $2.75 to $6.50 per square foot and in existing walls at $3.15 to $7.50.

Walls over garages and kneewalls

The walls and floors of bonus rooms over garages, and the short kneewalls in story-and-a-half homes, leak more than most walls. They often face an unheated space and have gaps at the top and bottom. Foam or carefully sealed blown insulation, plus air sealing at the edges, makes those rooms usable.

How we check walls

We look at outlets, use the attic and basement to see the tops and bottoms of the walls, and sometimes drill a test hole. That tells us what is inside before we price anything.