Top-rated insulation pros.

Best insulation pros near Cornelius, OR

Enter your zip and get matched with up to 5 pros

Need a pro for your insulation service project in Cornelius, OR?

Select your specific project to find the pro for you.

TRUSTED BY CORNELIUS, OR HOMEOWNERS

  • Average homeowner rating star icon4.4
    Average homeowner rating
  • Verified reviews icon233
    Verified insulation services reviews

Top-Rated Insulation pros in Cornelius - Updated Nov 2026

Avatar for JR Insulation Drywall, Inc.
JR Insulation Drywall, Inc.
4.6(
67
)
Blown-In Insulation - Install or UpgradeSpray Foam Insulation - InstallBatt, Rolled or Reflective Insulation - Install or Upgrade+2 more

Serving Cornelius, OR and surrounding areas

Approved

In business since 2004

Free estimates

Emergency services offered

"JR Insulation is a great company!! They did everything from start to finish as promised, on time, polite, clean, and on budget. I can't recommend them enough. They also fixed a problem that I created in my own ignorance for free just to make me even happier. I told them it wasn't necessary but they insisted. JR's pricing was the absolute best for everything they did. Not the lowest bid but the lowest price to value, which in my opinion is the lowest bid. I would use they again, in fact, I would not use any other company for insulation or dry wall. Brian"
Additional Photos
Additional Photos
Additional Photos
7 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for Northwest Weatherization
Northwest Weatherization
4.7(
97
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeInjection Insulation - Install

Serving Cornelius, OR and surrounding areas

Approved

In business since 2010

Free estimates

Credit card accepted

"The guys at NW Weatherization did an excellent job installing additional insulation in my attic and crawlspace. They also reattached the exhaust fan boot. I can tell that the added insulation is helping keep my home warmer since the furnace doesn't come on as often and run as long. Thank you Ryan and everyone at NW Weatherization!"
Example of a Properly Insulated Attic
Difference between insulated and non-insulated
The attic before insulation
A Properly Insulated Attic
Floor Insulation

+22

Response time1 day
36 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Josh Lowe's Dr. Energy Saver
Josh Lowe's Dr. Energy Saver
4.4(
101
)
Blown-In Insulation - Install or UpgradeSpray Foam Insulation - InstallBatt, Rolled or Reflective Insulation - Install or Upgrade+1 more

Serving Cornelius, OR and surrounding areas

Approved (Corporate)

In business since 2006

Free estimates

Warranties offered

"We had a small job to remove/replace insulation that may have been soiled in our attic from a squirrel that got up there years ago. It was mentioned in our home inspection. After going up to take a look, Sean explained he didn’t see any soiled insulation but there was a small area that had been moved away from the corner and it was effectively empty. It was really too small a job though to warrant them coming out to blow stuff in so he recommended just taking a leaf blower up there to redistribute it evenly. Brilliant idea! He also graciously took a look at our crawl space and identified some areas we should address but ones we could do on our own. He was great to talk to and very helpful and reasonable. So nice in these days of everyone trying to upsell everything. If and when we need insulation work, we’ll be calling Dr. Energy Saver! Thanks so much, Sean Becker!"
fiberglass in attic not working
attic insulated with closed-cell spray foam
Spray Foam Insulation
Spray Foam Insulation
Spray Foam Insulation

+36

Response time1 day
91 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Ulises Pro Insulation, LLC
Ulises Pro Insulation, LLC
4.6(
80
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or Upgrade

Serving Cornelius, OR and surrounding areas

Approved

In business since 2018

Free estimates

Small jobs welcome

"Ulises was responsive, timely in submitting a bid, and followed through with excellent work. We asked him to add insulation because one part of our home was unusually cold throughout the winter. After just one night I can tell the difference!"
Batts & Polar-Blanket in Bonus Room
Batts & Polar-Blanket in Bonus Room
Polar-Blanket
Polar-Blanket
Air Seal Package

+9

Response time9 hrs
4 neighbors recently requested a quote
Recommended by90%of homeowners
Timberland Insulation, LLC
4.4(
35
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install

Serving Cornelius, OR and surrounding areas

Approved

In business since 2011

Free estimates

Credit card accepted

"Juan of Timberland Insulation did an outstanding job. We had critters get into our crawl space where they ran amok all through our insulation. The old insulation had to be removed and new insulation installed. The crew at Timberland out performed my expectations. I would highly recommend them."
Response time2 days
2 neighbors recently requested a quote
Recommended by87%of homeowners
Avatar for Westside Drywall, Inc.
Westside Drywall, Inc.
4.1(
121
)
Spray Foam Insulation - InstallInjection Insulation - Install

Serving Cornelius, OR and surrounding areas

Approved

In business since 1979

Free estimates

Emergency services offered

"Westside Drywall was the only firm willing to do what I requested, which was to repair and not replace under-floor insulation. As a result, their price was much lower. An added bonus was that they could schedule the job in a few days instead of a few weeks or months."
Before Restoration
Blow In Blanket System
During Wall Injection
Before Restoration
Complex Window Design

+18

10 neighbors recently requested a quote
Recommended by97%of homeowners
Sierra NW Insulation, LLC
5.0(
4
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeInjection Insulation - Install+1 more

Serving Cornelius, OR and surrounding areas

Approved

In business since 2018

Free estimates

Customers say: True professional

Residential retro and new construction Insulation installment in attic, walls, and crawl. We install or upgrade blown-in, batt, rolled, and reflective insulation. We are an affordable family owned business that has 20+ years working for big companies in our area.

5 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Renewal Renovations, LLC
Renewal Renovations, LLC
5.0(
12
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or Upgrade

Serving Cornelius, OR and surrounding areas

Approved

In business since 2009

Free estimates

Warranties offered

"Kirk and his team helped investigate the source of a leak, remove and replace caulking, and repair drywall. They were efficient and did no more than necessary. Project came in slightly under the estimate as a result. I'm very thankful and pleased with their work."
Deck Creations!
New Siding Installation
Kitchen Remodel
Roof Installation
Awning Construction

+38

Response time4 hrs
Response rate98%
Recommended by100%of homeowners
...
Showing 1-10 of 88
Insulation FAQs, answered by experts

You do not always need to remove old insulation before adding new. If the existing insulation is in good condition—not wet, physically damaged, moldy, or infested with pests—you can add new insulation directly on top of it for a compounding effect. You can also mix different types, such as adding blown-in insulation around existing fiberglass batts.

However, removal is recommended if the old insulation is compromised by water damage or pests. You should also remove it if you plan to install a different type of insulation, like switching from roll or batt insulation to spray foam. If the existing insulation is very old or damaged, you will likely get more benefit from removing it and starting fresh.

If you have bubble wrap lying around the house and you don’t care about the odd look, taping bubble wrap over a window is a very affordable way to insulate it. Another inexpensive option for insulating windows is to add new caulk around the glass. This step quickly cuts down on air drafts for older windows, and a tube of caulk only costs a few dollars. Adding plastic shrink film around the glass is another cost-effective option. You can purchase a kit of plastic film for a few dollars per window.

It is usually possible to install insulation yourself, but it’s often better to hire an insulation professional. An experienced insulation pro can determine which type of insulation is best for your space and the R-value get the most value and comfort in your home. Certain types of insulation can cause skin, eye, and lung irritation, and a professional will have the equipment necessary to keep themselves safe and limit the effect on your indoor air quality after the installation. Certain types of insulation—like blown-in and loose-fill insulation—demand a professional for proper functionality and safe installation.

If you have access to the foundation walls, adding spray foam insulation to your existing unfinished basement or crawl space is straightforward. Replacing existing insulation in your unfinished attic space is possible after removing the old insulation. However, spray foam insulating an existing wall after the drywall is in place isn’t possible unless you remove most of the drywall.

Winterizing your outdoor plumbing keeps your outdoor spigot from freezing and potentially bursting. This includes draining residual water out of the pipe and spigot after turning the valve off, then removing garden hoses and other attachments from the spigot before winter comes. Insulating the pipe that leads to the spigot and installing a freeze-proof faucet also help, as does installing an outdoor faucet protector.

The Cornelius, OR homeowners’ guide to insulation services

From average costs to expert advice, get all the answers you need to get your job done.