Older houses have little insulation in the walls, or even none at all.

Uninsulated walls lose heat more quickly to the outdoors, resulting in:

  • Higher heating costs
  • Drafts across the floors
  • Condensation on interior surfaces leading to mold and mildew growth

Your investment in wall insulation will pay for itself in reduced heating costs.


The best way to install insulation into the walls of a finished house is to blow loose-fill insulation into the wood-frame wall cavities. Our professional crew will drill holes in between each set of studs and blow insulation into each opening.

The insulation can be blown in from the exterior or the interior. Sometimes this decision depends on the way the house is constructed, for example brick homes normally require interior installation.

Contact North Coast Insulation for an inspection. We'll give you a free estimate and describe the methods we'll use to insulate the walls of your home.

Blown-in insulation




Our crew is installing blown-in insulation in an older house with shingle-style siding.

The crew has loosened and removed some shingles to allow them to drill into the wall sheathing and access the space between the studs.

You can see the holes that have been drilled, and the fiberglas loose-fill insulation that has been blown into the walls.

image 11

Once the insulation is blown into the wall our crew will plug each hole. Here you can see the plugged holes.

The final step will be to fasten the shingles back into place.

image 12



Here our crew is installing blown-in insulation in an older house from the interior.

They are drilling 2-1/2" holes into the wall between each set of studs. The drilling equipment is attached to a shop vac so that dust and debris are captured.

image 14a

The walls prepared for the insulation.

image 14b

Blowing loose-fill fiberglas insulation into the holes.

image 14c

The insulation is installed and the holes have been plugged. The plugs can be sanded down flush with the wall and patched with spackling, and then the walls can be painted.

image 14d


North Coast Insulation and Ventilation