It’s entirely possible to keep the charm of an older home and improve its efficiency.
Photo by Mark Gilliland, Pioneer Utility Resources
Q: How do I improve the efficiency of my older home while keeping its charm?
A: The features of older homes can make them less efficient than modern construction, but it doesn’t have to be that way.
To improve your home’s energy efficiency—and comfort—start by prioritizing the invisible upgrades. Sure, most of us don’t think, “I can’t wait to spend my hard-earned money on insulation.” It’s not as exciting as new countertops or a remodeled bathroom, but air sealing and insulation can save you money every month. Then you can apply the savings to aesthetic improvements.
Many older homes are not properly insulated. Beyond sealing your home and keeping outdoor air from seeping in, insulation reduces outdoor noise, makes your home quieter and improves your overall comfort.
Always properly air seal before you insulate. Older homes with pocket doors, coved ceilings, dumbwaiters, doors to attic spaces and laundry chutes allow indoor air to escape through the cavities, gaps and cracks around these classic features. Sealing off open cavities around those features often requires plywood, rigid foam or drywall fastened into place and then caulked around the edges.
Keep an eye out for framing features that cause drafts. Balloon framing is a type of construction where wall studs run all the way from the foundation to the roof, allowing air to flow freely through those spaces. Second floors with knee wall attics on both sides are notorious for air leakage. Open cavities allow air to flow horizontally between the attic spaces, making the home uncomfortable and inefficient. Seal off the open cavities in the floor framing and insulate attic spaces.
Dense-packed cellulose or closed-cell foam insulation can be sprayed into exterior walls. Skilled contractors can remove pieces of siding and drill holes to fill the wall cavities from the outside of the home. For brick or stone homes, holes can be drilled from the inside and then patched and painted. Insulating walls from the inside of the home requires more time and effort in preparation and cleanup, but having well-insulated walls is worth it.
Knob and tube wiring—commonly used from the early 1880s to the 1930s with no grounding wire—should be replaced for safety purposes prior to insulating walls and attics. Contact between insulation and knob and tube wiring can create a fire hazard.
People often think new windows are the best way to improve a home’s efficiency. But considering the cost of replacing windows, I recommend investing in air sealing and insulation first. Then consider storm windows to keep the charm of the original windows, such as leaded glass and stained glass, in good condition.
Once you’ve addressed the envelope of your home, consider appliance improvements. Replace your old electric water heater with a heat pump water heater. This upgrade can save a family of four an estimated $550 per year and more than $5,600 over the lifetime of the water heater, according to ENERGY STAR.
Also, invest in high-efficiency heating and cooling equipment. A mini-split heat pump, or ductless heat pump, is a more efficient option than electric baseboard heating, and it provides the benefit of air conditioning.
Older homes don’t have to be inefficient. Show your home some love and invest in energy-efficient upgrades.
Miranda Boutelle writes on energy efficiency topics for the National Rural Electric Cooperative Association, the national trade association representing nearly 900 electric co-ops.