Insulated Basement Walls

Highlights

For additions or new home contruction, instal insulation to the exterior of all basement walls to add at least R-11.

For example, for an addition you can use an unfaced R-11.5 over 8" Concrete Block (CMU) or preferred 12" thick CMU filled with concrete and wood or metal 2x4 studs on the inside with insulation. In addition to energy savings, you will create a room that has a more comfortable climate and you may consider finishing the floors so that it is more than just storage. Select a 'Formaldehyde-Free' insulation to save on air quality and health.

For existing properties, make sure to insulate the space between the top of the basement wall and the underside of the first floor. These 'Basement Rim Joist' cavities between the floor joist bays are very often left without insulation in older homes. The value of this 'infil' insulation comes in preventing the energy loss from the narrow floor thickness band that is just above grade and exposed to the outside air temperatures. If you add the insulation yourself, just make sure to place the foil/vapor barrier on the 'warm side'.

The ROI Calculation is based on saving $15 a month over the course of the year. Plus get Tax Credits: 10% of cost not to exceed $500 total

Consider using 12” vs. 8” Concrete block that is filled. If possible, excavate to have a ‘walk-out’ basement, and add exterior insulation (yellow panels) that also reduce the hydrostatic pressure that can cause leaky basements.

TAKE ACTION Find a contractor: Click Here Check the ZIP-Code Insulation Program to quickly see the most economic insulation level for your new or existing house: Click Here Get High Performace Prodcuts by Thermafiber: Click Here Find an Insulation Specialist in Your Area: Click Here Also Get Free infomation and pricing from a Basement Remodeling Contractor near You: Click Here See the Tax Credits: Click Here