Concrete Ceilings

Concrete ceilings below unheated spaces should have a maximum U-value of 0.07, requiring insulation rated R-11 or greater. The fol­lowing methods are suggested for insulating concrete ceilings:

1. Attach preformed rigid insulation to either surface with adhesives.

2. Apply sprayed-on rigid insulation to either surface.

3. Make a sandwich construction with preformed rigid insula­tion formed around a concrete core.

4. Apply rigid insulation to the top surface where the ceiling also serves as the roof of the structure.

Posted in Audel HVAC Fundamentals Volume 1 Heating Systems, Furnaces, and Boilers