Energy Efficient, Weatherization Up-grades
One Option: Foam
, to make an Appointment for Consultation
Builder or Homeowner,
or Request an Estimate.
Gaining considerable popularity, Sprayed Polyurethane Foam
(SPF) economically insulates, seals, bonds, fills, and stops air
infiltration.

Application possibilities include knee-walls in drafty bonus rooms,
band joists in basements, crawl spaces and elsewhere and can
even be trimmed, sanded & painted.  
A knee-wall that is not airtight on the back side is an
invitation for thermal problems. Air driven by wind or
temperature differences overpowers the insulation’s
resistance to air motion and moves through the insulation,
which reduces its R-value. Additionally, the air movement
through the walls may also cause condensation at the
drywall surfaces.
But, Insulation itself is still only part of the story.
It's likely that your home
has an energy, heating
& cooling eater like this,
or several.