The Real Cost of Not Insulating Your Home for Another Year (What Rising Bills Add Up To)

Quick answer: Every season an under-insulated home runs, you pay to heat and cool air that slips out through the walls and attic. ENERGY STAR estimates air sealing and insulating saves homeowners about 15% on heating and cooling, on average. Waiting a year means paying that extra for one more winter and summer, with the same cold rooms.

Most Spokane homeowners who call us already know their house is under-insulated. The upstairs bedroom is cold by November. The living room never quite warms up. The real question is usually timing. So let's talk plainly about the cost of not insulating your home for one more year, and what that delay really adds up to.

What does it cost to wait to insulate your home?

The cost of waiting is the energy you keep paying for that you don't get to keep. When walls and attics are thin on insulation, heat moves out in winter and in during summer. Your furnace and air conditioner make up the difference, and your bill reflects it.

ENERGY STAR estimates that homeowners save about 15% on heating and cooling costs, on average, by air sealing and adding insulation. Flip that around and you can see what waiting means: for a typical under-insulated home, a share of every heating and cooling dollar is going out through the walls and ceiling.

A year of waiting doesn't cost just one bill. It costs:

• One more heating season. In the Inland Northwest, that is the big one. Cold, dry winters run from late fall well into spring.
• One more smoke-season summer. When wildfire smoke keeps the windows shut, your AC works harder in a leaky house.
• One more year of uneven rooms. The cold back bedroom and the hot upstairs stay that way.
• One more year of wear on your furnace and AC, since they run longer to keep up.

We won't put a dollar figure on it, because every house is different. Your home's size, age, heating fuel, and current insulation all change the math. What we can do is measure what you have and show you where the heat is going.

Where does the heat actually go in an older Spokane home?

USA Insulation estimates that a typical home loses heat in roughly these proportions:

That wall number surprises people. Many homes built before 1980, including plenty on the South Hill and in north Spokane, were built with little or no insulation in the exterior walls. You can add all the attic insulation you want, but if the walls are hollow, a big share of your heat keeps leaving.

This is also why "we'll just replace the windows first" can be a costly order of operations. Windows matter, but in most older homes the walls and attic are the bigger leaks.

Is it worth insulating now instead of next year?

For most homeowners, yes, and fall is the reason. Here is why timing matters in Spokane, Spokane Valley, and Coeur d'Alene:

1. You get the full heating season. Insulation installed in September or October is working before the first hard frost and through every cold month that follows. Wait until spring, and you pay for a full winter of waste first.
2. Install is quick. Most of our jobs are finished in one day. Injection foam hardens within minutes, and we never touch your interior walls.
3. Nothing about the project gets easier by waiting. Your walls won't insulate themselves, and incentive programs can change from year to year.
4. Comfort starts the day we leave. Customers often call back to tell us a room that was always cold finally feels like the rest of the house.

There is one honest exception. If you have a roof leak, a wet crawl space, or a moisture problem, fix that first. Insulation works best in a dry house.

"Other projects come first." How should you weigh insulation?

We hear this one a lot, and it's fair. A new deck, a kitchen, or a car repair can all feel more urgent.

Here is a simple way to think about it. Most home projects cost money once. Poor insulation costs you a little every single month, and it keeps doing that until you fix it. It also shows up in how your home feels every day: drafty hallways, cold floors, and a thermostat you keep bumping up.

If you're choosing between projects, ask yourself which one you will notice every month, and which one lowers a bill you pay every month. Insulation is one of the few upgrades that does both.

What if the upfront cost is what's holding you back?

That is the most common reason people wait. A few things help:

• Know what drives the price. The size of the areas being insulated, how much insulation you already have, whether you need wall foam, attic insulation, or both, how easy the attic is to reach, and your siding type all affect the quote.
• Avista Utilities customers may qualify for rebates. USA Insulation of Spokane-CDA is an Avista Utilities approved installer. Through the Avista Utilities Home Insulation Program, rebates can cover up to 100% of the upgrade for qualifying homes, and the rebate is applied upfront. Not every home qualifies, so we check during your visit.
• Financing is available through USA Insulation's independent lending partners (not through Avista Utilities), if you'd rather spread out the cost.
• Not an Avista Utilities customer? Many homes in our area are served by other utilities. You still get a free inspection and access to financing.

The federal 25C tax credit for insulation ended for work completed after December 31, 2025, so don't plan around it.

How do you figure out the cost of not insulating your home?

The fastest way is a free in-home estimate. Here's what happens:

1. We measure the insulation already in your walls and attic.
2. We take photos so you can see exactly what we found.
3. We walk you through the results in person.
4. You get an e-quote the same day or within 24 hours.

There's no pressure. If you want a second or third quote, we welcome it. Just compare the product, what each company measured, how the install works, and how they handle cleanup.

The bottom line for Spokane and North Idaho homeowners

Waiting another year to insulate moves your spending from a project that pays you back into energy bills that don't. Whether you're in Spokane, Liberty Lake, Post Falls, or Coeur d'Alene, Idaho, the best time to find out where your heat is going is before the snow flies.

FAQ

What does it cost to wait to insulate your home?

You keep paying for heating and cooling that escapes through thin walls and attics. ENERGY STAR estimates insulating and air sealing saves about 15% on heating and cooling, on average, so waiting a year means another full season of that waste plus the same uncomfortable rooms.

Is fall a good time to insulate in Spokane?

Yes. Insulation installed in September or October is working before the coldest months, so you benefit from the entire heating season. Most jobs are finished in a single day.

Where does most heat escape from an older home?

USA Insulation estimates about 35% of a home's heat loss goes through the walls, 25% through the attic, 15% through the basement or floor, and 10% through windows. Many homes built before 1980 have little or no wall insulation.

Can I insulate my walls without tearing out drywall?

Yes. With injection foam, the crew works from the outside. On sided homes they remove a strip of siding, drill, fill, plug, and replace the siding. On brick homes they drill through the mortar joints and patch them. Interior walls are never touched.

How can I lower the upfront cost of insulation?

Avista Utilities customers in qualifying homes may be eligible for rebates applied upfront through the Home Insulation Program. Financing is also available through USA Insulation's independent lending partners.

Stop the waste. Get a free quote.

Book a free in-home estimate. We'll measure the insulation you have now, take photos, walk you through what we find, and send your e-quote the same day or within 24 hours.

Call 509-862-5655 or request your free estimate.