How to Increase the "R" Value of a New Home

Maximize the insulation of your new home for better energy efficiency.

R-value refers to the ability of insulation to resist heat. Products with higher R-values are more effective at insulating a house than comparable products with lower R-values. Increasing the R-value of a new home involves improving the insulation to make the house more energy efficient. There are many approaches that can be taken to improve insulation, ranging from small chores like insulating wall outlets to larger projects like replacing windows.

Instructions

1. Take stock of the type and quality of building materials in your new home. If the construction is recent, ask for the R-values associated with the type of windows, roofing and insulation used on the house. Materials that already have a high R-value don't need to be replaced.

2. Locate places in the home where outside air is leaking in. Check for doors that don't fit properly and windows that don't close all the way. Repair these to prevent heat loss from the house during the winter.

3. Install foam gaskets behind light switches and power outlets on exterior walls. Close the fireplace flue damper when it's not in use.

4. Add insulation to the attic or crawl space. A variety of insulation materials are available. Which you choose will depend on how much access you have to the attic or crawlspace, your budget and whether you are doing it yourself or hiring a company to do the work. Blown-in fiberglass or cellulose can be effective for tight spaces with limited access.

5. Insulate exterior walls. Blown-in insulation can be a solution for filling wall cavities. Rigid foam board can be added before the exterior of a house is completed or when replacing the siding or stucco on your house.

6. Use energy-efficient windows. Windows can be a major point of heat leakage, even in new homes. When evaluating windows, look for products with a low U-value. U-value indicates resistance to heat flow. Lower numbers are better.

Tips & Warnings

• Heat shrink plastic window seals can be used to help insulate drafty windows during the winter.

References

• Microsoft Hohm: Add Insulation to Your Attic to Increase the R-Value
• Fine Homebuilding: Understanding Energy-Efficient Windows