The answer according to ENERGY STAR is that you can install new insulation over your old insulation unless the old insulation is wet.
Here are some factors to consider:
- Do not install kraft faced insulation over the top of current insulation in an attic. Batt insulation installed over existing insulation in an attic needs to be unfaced batts.
- Blown-in loose fill insulation (cellulose or fiberglass) can be installed on top of existing insulation.
- It is best to seal air leaks before adding insulation because air sealing can increase the energy efficiency of your home.
You don’t need to worry about any of these factors. The professionals at EcoLogical Montgomery will answer all your questions and provide professional installation services.