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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 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

"Did a great job of installing insulation and drywall however, they cracked a wall when installing the drywall, they hammered rather than screw it into the studs. Now I must repair the cracked wall. Somehow my compact florescent light also disappeared from the laundry room . They also initially wanted to put the R-30 insulation on top of the R-11 that was already in the ceiling. When compressed the insulation would have lost some of its insulating capabilities so I had to tell them not to do that. Seems they should have known this."
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
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Insulation FAQs, answered by experts

Drywall insulation costs around $1,800, on average, but prices can range from $500 to $4,500, depending on a few different factors. The following things are important considerations to make when pricing out your insulation project:

  • Square footage of insulation

  • Type of insulation 

  • Climate in your area and the insulation R-value required

  • Whether or not your walls are already finished

  • Accessibility of the area 

  • Whether or not you need old insulation removed first

Most homeowners installing blown-in insulation as a one-off DIY project should simply rent a blower. They tend to be very heavy, and contractor-grade machines can cost $13,000 to $16,000.

It depends on your needs and preferences, though many homeowners think it is worth it. Not only is blown-in insulation easy to install, but it is highly efficient with thermal regulation. Most types are mold-resistant, flame-resistant, insect-resistant, and, most importantly, completely safe.

Your home's location, budget, and the type of insulation you’re using are just a few of the factors that can help you choose the right insulation. For example, blown-in insulation is typically used in attic spaces, while batts and rolls are ideal for floors and walls. Blown-in insulation is usually a good option if you're adding more insulation to an area that already has some, but not enough.

Yes, you can use too much bubble wrap. If you overdo it with the wrapping, it can strain the top of your box and break open the taped seal, risking the chance that the contents of the box could fall out or break. Use enough wrapping to fully cover your item without compromising the security of your box.

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.