How to Upgrade Your Home’s Insulation During a Renovation

12 September 2025

So, you're finally diving into that long-overdue home renovation? Exciting, right? Fresh paint, sleek new countertops, maybe even that spa-like bathroom you’ve been dreaming about. But hold up—before you get lost in the aesthetics, let’s talk about something that’s often overlooked yet ridiculously important: insulation.

Upgrading your home’s insulation during a renovation isn’t just about staying cozy in winter and cool in summer—it’s about saving big bucks on energy bills, reducing noise, and even boosting your home’s resale value. So, if you’re tearing things apart anyway, why not do it right? Let’s break it down.

Why Insulation Should Be on Your Reno Checklist

Most people don’t think about insulation unless they’re shivering in their living room under three blankets. But the truth is, insulation plays a major role in your home’s energy efficiency. If your place was built decades ago, chances are your insulation is outdated—or worse, nonexistent in some areas.

By upgrading it now, you’re ensuring that your home stays comfortable year-round, and you won’t be throwing money out the window (literally—poor insulation lets heat and AC escape like nobody’s business).

The Benefits of Upgrading Insulation

- Lower Energy Bills: Proper insulation can slash heating and cooling costs by up to 40%. That’s extra cash for your dream kitchen or that fancy rain showerhead.
- Increased Comfort: No more freezing in winter and sweating through your sheets in summer.
- Better Soundproofing: Say goodbye to outside noise creeping in—your home becomes your quiet sanctuary.
- Higher Resale Value: Buyers love an energy-efficient home, meaning better offers when you sell.
- Eco-Friendly Living: Less energy use = a smaller carbon footprint. Mother Nature approves.

Best Types of Insulation for a Home Renovation

Okay, now that we’ve established that insulation is worth your time and money, let's talk about which insulation materials are actually worth considering.

1. Spray Foam Insulation – The MVP of Insulation

If you want the best of the best, spray foam insulation is your go-to. It expands to fill in every tiny gap, making sure no air escapes.

✅ Pros:
- Super high R-value (aka excellent thermal performance)
- Seals all gaps, preventing drafts and air leaks
- Acts as a moisture barrier (no mold, no problem)

❌ Cons:
- More expensive upfront
- Requires professional installation

💡 Perfect for: Attics, walls, and any hard-to-reach spots.

2. Fiberglass Insulation – The Classic Choice

Good ol’ fiberglass insulation has been around forever, and there’s a reason people still use it—it gets the job done at an affordable price.

✅ Pros:
- Budget-friendly
- Easy DIY install if you’re handy
- Fire-resistant

❌ Cons:
- Not as airtight as spray foam
- Can trap moisture if not installed properly

💡 Perfect for: Walls, attics, and ceilings if you’re on a budget.

3. Cellulose Insulation – The Green Option

Eco-conscious? Cellulose insulation is made from recycled paper products and treated with fire retardants.

✅ Pros:
- Environmentally friendly
- Good at reducing air leaks
- Resistant to pests and mold

❌ Cons:
- Can settle over time, reducing effectiveness
- Can retain moisture if not installed properly

💡 Perfect for: Attics and walls if you're looking for a sustainable option.

4. Rigid Foam Insulation – Best for Extreme Temperatures

Rigid foam boards are excellent for keeping your home toasty or cool, depending on the season.

✅ Pros:
- Extremely high insulating value
- Water and mold-resistant
- Great for basements and garages

❌ Cons:
- Not the cheapest option
- Requires precise cutting and sealing

💡 Perfect for: Foundations, basements, and exterior walls.

Where to Upgrade Insulation During Your Renovation

Now that you know your options, where should you actually add insulation? Don’t worry, I’ve got you covered.

1. The Attic – The #1 Priority

Listen, if you skimp on attic insulation, you might as well burn your money. Heat rises, and without proper attic insulation, your home is working overtime to maintain a comfortable temperature.

Best insulation types: Spray foam, fiberglass batts, or blown-in cellulose.

2. The Walls – Keep the Drafts Out

If you're already opening up your walls for electrical or plumbing updates, this is the perfect time to add insulation. Older homes often have little to no insulation in the walls, which is basically an open invitation for drafts.

Best insulation types: Fiberglass batts, cellulose, or spray foam.

3. The Floors – Especially Above Unheated Spaces

Got a basement or crawlspace? Insulating the floors above them can prevent cold feet (literally).

Best insulation types: Rigid foam boards or fiberglass batts.

4. The Basement – No More Icebox Vibes

An unfinished basement can feel like the Arctic in winter. Adding insulation to the walls and floors can make this space livable and energy-efficient.

Best insulation types: Rigid foam boards or spray foam.

Pro Tips for a Successful Insulation Upgrade

Let’s talk about a few must-know tips to make sure your insulation upgrade during renovation is a total win.

1. Don’t Ignore Air Leaks

Insulation is great, but if your home has air leaks around windows, doors, and vents, you’re still losing energy. Seal those gaps with caulk or weather-stripping before insulating.

2. Go for a Higher R-Value

The higher the R-value, the better the insulation. If you're in a colder climate, go big or go home—choose insulation with a higher R-value to keep the heat in.

3. Hire a Pro for Spray Foam

DIYing fiberglass batts? Possible. But spray foam? Leave it to the pros—mishandling it can result in poor coverage and wasted money.

4. Check for Moisture Issues

Got moisture problems? Insulating without addressing them can lead to mold growth and structural damage. Make sure your home is dry before installation.

5. Take Advantage of Rebates

Many areas offer energy-efficiency rebates for upgrading insulation. Check with local utility companies or government programs to see if you can score some savings.

Final Thoughts

Renovating is the perfect time to upgrade your home’s insulation—you’re already opening up walls and tearing things down, so why not future-proof your home while you’re at it? A well-insulated home means lower energy bills, better comfort, and even higher resale value.

So, before you get too caught up in picking out tile patterns and paint colors, add insulation upgrades to your reno checklist. Your wallet (and your future self) will thank you.