Suburban two story house on a basement built in 1996 with a room over the garage.

Knee walls with R-11 batts.  No sheathing or air sealing present.  Located on both sides of the room over the garage.

The kneewalls are covered with a foil faced rigid foam boaed and all the seams are sealed.  Much more comfortable and efficient!

More knee walls with poorly installed fiberglass batts.

Knee walls are now covered with Thermax sheathing and all the seams are sealed.

Uninsulated drop down attic stairs.  No weather stripping was installed either and the bottom left leg was broken.

Newly installed attic access tent and new aluminum drop down stairs.  Strong, insulated, and air sealed.

HVAC equipment located in the attic next to more knee walls.

This is a supply duct connection located in the attic.  It was almost completely disconnected.

The same duct connection properly attached and sealed with mastic.

An open chase in the attic that brought the gas line up from the basement and the drainage line back down two stories.

The deepest area of insulation was R-27.

We air sealed all the penetrations and chases and blew in new fiberglass insulation to a consistent R-36.

Fiberglass batts stapled to the bottoms of the floor joists leaving a 6" gap between the insulation and the subfloor above.

Pushed the existing batts up against the subfloor and installed stays to keep them there.  Not as pretty but more effective.

None of the basement penetrations were air sealed.  Fiberglass insulation doesn't count.

More unsealed subfloor penetrations in the basement.

All the penetrations in the subfloor were filled with the proper types of spray foam.

There were several panned joist returns and none of them were air sealed.

All the seams on the panned joists were sealed with either caulk or spray foam.

HVAC located in the unconditioned basement.  Mastic is sporadic and the metal plenums are not insulated.

HVAC equipment in unconditioned basement is now sealed with mastic and plenums are insulated with duct wrap.