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Numerous materials can be used. Wall insulation entails a lot of detail that must be understood for energy-efficient and comfortable living space. Once walls are insulated it contributes to the management of indoor temperature, saves power use, and creates an effective home. 



Wall insulation increases thermal and acoustic insulation which results in more affordable energy bills and an optimal living environment. 


Blown-in insulation is a method of insulating walls that involves blowing Cellulose into wall cavities through holes 1-2 ½ inches wide. This is the preferred method for insulating existing, closed-up walls, as it offers a far easier method of improving the R-value of walls than installing fiberglass batts.


Batt insulation is fitted between the studs of an exterior wall. Some products are available with a facing including kraft paper vinyl, or foil which will provide an additional air or vapor barrier. 


  • Cellulose

Cellulose insulation is made of recycled paper and has an R-value of 3.5-.38

  • Loose-Fill Fiberglass

Fiberglass insulation has an R-value of 2.2-2.69 per inch, meaning you will need more fiberglass insulation to get the same effects of cellulose.


The most common type of batt insulation is fiberglass, but other materials can include mineral rock or slag wool.

  • Fiberglass Batt

 Made of fibrous glass wool encased by an outer layer made from paper, plastic, metal, or other textile materials. They come in pre-cut sections and come in different thicknesses and widths. 

  • Mineral Wool

This type of insulation is fire and water-resistant.  Mineral wool can withstand extreme heat better than any other type of insulation. This gives your home better protection against flame spread. Also, mineral wool does not absorb water, which means it will stay intact even when wet.  


For exterior walls, we use Owens Corning fiberglass insulation. It’s a formaldehyde-free insulation that works well on exterior walls. Installing insulation in exterior walls also requires drilling two-inch holes. If your exterior walls have siding, we’ll need to remove a row of it to access the plywood.

Once we’ve installed the insulation, we’ll cover the holes with a wooden or foam plug. If we’ve needed to remove siding, we’ll put it back in place.


Internal wall insulation has more than one advantage. If you choose to insulate your interior walls it can significantly reduce heating and cooling costs, making it easier to maintain temperatures in your home which will put less stress on your HVAC system. 

Interior wall insulation can potentially reduce noise from room to room by creating essentially a barrier between each room that is insulated.


Rigid foam board has relatively high insulation value and flexibility. It is light, solid, and usable with different wall surfaces. Foam board insulation offers a very good R-value which makes it suitable for residential or even commercial purposes. It has a high thermal insulating property for its thickness and can be appropriate where there is a lack of space.  


There are many different types of insulation you can use when you renovate or upgrade your home’s exterior walls. Exterior walls can either be insulated with insulation blankets and pre-cut batts or blown-in.

  • Unfaced or faced fiberglass insulation

  • Regular or high-density fiberglass batts

  • Rigid foam board

  • Spray foam up to two inches thick

  • Blown-in cellulose

  • Blown-in fiberglass

  • Roxul (a fireproof and water-repellent insulation solution)


For interior walls, the products we use are batts made from materials such as fiberglass or mineral wool. 

  • Rigid Foam Board

Foam boards and rigid foam boards reduce the amount of heat conducted through the wood, wall studs, and other elements that make up a home’s structure.

  • Fiberglass Batts

Fiberglass batts are the most cost-effective. However, they must be installed properly to avoid small gaps that can reduce efficiency as much as 25 percent.

  • Rockwool

Rockwoll is more expensive than fiberglass and typically comes in rolls of batts that are pre-cut. Providing up to R-3.3 per inch of thickness.

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Wall insulation has many benefits , below are the benefits of wall insulation. 

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should you insulate your walls?


energy efficiency

Wall insulation is effective at temperature control, it will help maintain stable indoor temperatures, which will reduce your need to crank up the heating or cooling. 


noise reduction

Although not always the case, wall insulation can control noise. Insulation can dampen the sound waves, particularly high-frequency sound waves, which can decrease the level of noise that passes through the walls from one room to the next. 


fire protection

If a fire starts in your home, fire-resistant wall insulation can slow the spread of flames, keeping the fire contained to a smaller area so you have more time to get out of your home. It can also protect your home from more extensive damage. 


moisture control

Depending on the location of the wall and the climate, you might be able to benefit from adding a vapor control layer. Good interior wall insulation reduces the risk of moisture problems by slowing heat transfer in your home and regulating temperature. 


What Is Wall insulation?

Wall insulation is added material to the walls of your home or building that reduces heat transfer which increases energy savings and home comfort. 

what is the best material for wall insulation?

Wall insulation material is unique to each house wall insulation may consist of cellulose, fiberglass, foam board, or mineral wool. 

why is wall insulation important?

Benefits of wall insulation that will accrue when installed include less wear and tear on the HVAC system, more efficient use of energy, better comfort, less damage to the environment, and potential increased property value.  

Why Choose Insulation Co. LLC for Your blown in wall insulation

over 25 years experience

Insulation Co. – Serving Seattle for 25+ years with expertise and professionalism. Our experienced team, led by founder Jo, has been dedicated to delivering quality craftsmanship and friendly customer service to all his customers for almost two decades. All of our team members have over ten years of experience in the industry and are fully trained and certified.  Your trusted partner in Seattle for insulation solutions. Trust our experienced team for all your insulation needs.Contact us today for expert service and friendly assistance.

10-year warranty on insulation workmanship

All of our work is backed by a 10-year transferable warranty on insulation workmanship and a 2-year transferable warranty on mold remediation, sump pump, and French drain install workmanship (if applicable to the bid scope of work). Included in our warranty is one free complimentary courtesy check. Unlike other companies, there does not have to be anything wrong for us to come and inspect your attic and crawl space. We encourage customers to schedule their courtesy check a year after the work is done to put their minds at ease that everything is still in tip-top shape.

insured, bonded, and licensed

Insulation Co. – Providing licensed, bonded, and insured services for your insulation needs. Trust our expertise and commitment to quality work. It is important to choose a contractor who is licensed, bonded, and insured because this ensures we know how to do our job properly and can protect ourselves against any potential mistakes. We also know this will offer a sense of security to our customers. Having worker’s compensation and liability insurance for our employees means we are allowed to get and sign building permits if necessary. 

owner-run company

Owning a business can be tough, but also incredibly rewarding. Experience the advantage of talking directly to the owner of our business, Jo, who started installing insulation at the young age of 10. Jo, the founder of the company, has firsthand experience in the insulation industry since childhood. Gain a unique advantage by connecting with Jo, the owner of our business. Benefit from firsthand experience and expert knowledge in the insulation industry! Get a free estimate and virtual consultation now!

free same-day estimates

Get fast, free, virtual, and same-day quotes for your home improvement project. We understand that this is not a cheap service. Providing customers with fast, free, virtual, and same-day quotes will give you a starting point for your home improvement project. Included in your free estimate is a virtual consultation to discuss the project and answer any questions you may have. Start your home improvement project with ease!

5 star customer reviews

Experience a customer-focused company that prioritizes your wants and needs. Our goal is to make a customer and not a sale. Some businesses are too focused on making sales but don’t pay enough attention to satisfying the customers’ wants and needs. Customer reviews are a reflection of our customer’s experience with our company and services. Customer interactions are our primary means to create true customer relationships to build our brand. 


Call Us At (425) 903-6453 For Blown In Wall Insulation In The Seattle Area.

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