Knee Wall Insulation

What This Service Involves

Knee walls, the short vertical walls in finished attics and bonus rooms, often back onto unconditioned attic space and leak energy badly. We air-seal the wall and the floor cavity behind it, then insulate properly so those rooms stop running hot or cold. Blocking and correct detailing keep the insulation in contact with the wall rather than falling into the attic void. The result is a bonus room or upstairs that finally stays comfortable year-round.

Benefits

Evens out temperatures in bonus rooms; Stops energy loss into attic voids; Reduces drafts behind finished walls; Improves comfort on upper floors; Pairs air sealing with proper insulation

Our Process

1) Inspect knee walls and adjoining attic cavities; 2) Air-seal the wall and floor cavity behind it; 3) Install blocking and insulation against the wall; 4) Confirm contact, coverage, and sealing

What Affects the Cost

Length and height of knee walls; Air sealing and blocking labor; Insulation type and R-value; Access behind finished spaces; Existing conditions and repairs

Best Time of Year

Knee wall work fits any season and is popular ahead of both summer heat and winter cold.