Cold floors

Heating · Introduction · printed page 110 (PDF page 111)

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Cold Floors in Homes Floor – Cold

Text in the illustration

heat registers located below windows and "adequate" floor insulation often can't prevent a room over an unheated space from having a cold floor (even though the room itself is at 72°)
cold
heat
insulation
outside, garage or crawlspace - 35°F

Generated explanation

The illustration depicts a room with two floor heat registers along the wall beneath a window. A cutaway at the front edge shows insulation between the floor framing members above an area labeled as outside, a garage, or a crawlspace at 35°F. Red arrows indicate heat rising from the registers, while blue arrows identify cold conditions at the floor. The annotation explains that registers below windows and "adequate" floor insulation may not prevent cold floors over unheated spaces, even when the room itself is at 72°.

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