Increased Energy-efficiency and Protection with Cellulose Insulation in St. John’s

Manufactured from discarded newspapers and other waste paper fibres, cellulose insulation is a game-changer in residential and commercial building construction.

It has proven to perform at a much more efficient level than other insulation products on the market. It’s no surprise that Shield Insulations offers cellulose insulation to our clients in St. John’s. We want our clients to have unrivalled products that are capable of providing several benefits and perform at a higher level than similar insulation materials. 


Cellulose has made a big comeback recently because of how environmentally friendly it is. Cellulose insulation incorporates a high amount of recycled content when compared to other furnace-produced insulation materials. Add to this its ability to provide long-term energy savings and you have a product that is perfect for the need of the hour. During the manufacture of cellulose, the paper fibres are treated with boric acid to retard the spread of fire. This is a big advantage as fire-retardancy is an important factor to consider for building contractors when approaching a construction project. Get in touch with us to learn more about how your property can benefit from cellulose insulation.

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Did you know?

Birds and small mammals love to make their homes in fiberglass.

Advantages of Cellulose Insulation

There is a reason why we use cellulose insulation in all of our projects. It is an extremely environmentally friendly product that can be applied in a much better way than other insulation materials. With other insulation products using batts for installation, there is a chance of the outside air or moisture infiltrating through small cracks or spaces that develop over time. Cellulose is sprayed into surfaces and coats even the smallest gaps and crevasses adequately, reducing the chance of anything coming through.


The additional benefits of cellulose insulation are as follows: 

Biogenic building material that creates carbon storage in-house, making it environmentally beneficial
​Made up of 80% recycled content like old newspapers
​Due to the presence of borates, cellulose is resistant to mould, mildew and pests
​Very efficient at acoustic absorption making it an effective sound barrier thus providing a quieter indoor space
Cellulose insulation keeps heat energy indoors for longer and reduces heating costs

Extremely Fire-retardant

Cellulose insulation has shown a great amount of fire-retardancy when tested against buildings with other types of insulation. The waste paper fibres that are used in the manufacturing process are treated with boric acid to make them extremely resistant to fire. This in turn adds extra protection to the structural elements of a building and buys more time for responders to act in case of a fire. Due to this and other beneficial aspects, cellulose insulation is popular amongst building contractors.

Cellulose vs Fibreglass 

Cellulose insulation is up to 30% more efficient than fibreglass insulation. The efficiency levels can be compared by discussing a few key features. 

  • Cellulose insulation has a higher r-value

    R-value is a measure of thermal resistance. A cellulose insulation installation resists heat flow at a higher rate than a fibreglass installation because of the possibility of the fibreglass batts developing gaps over time, thereby allowing air infiltration. Cellulose keeps heat in or out depending on the season, making it very efficient at temperature regulation. 

  • Better energy savings

    In the long term, cellulose insulation provides better energy savings as it is very efficient at keeping heat from flowing through the walls. 



  • Increased sound absorption

    Cellulose has a higher amount of acoustic absorption than fibreglass, making it a superior option for noise reduction.



  • More efficient installation

    When installing fibreglass insulation, we use large batts or blocks that are added to several areas of the building. Over time, these can develop gaps that can cause air and moisture infiltration. Cellulose is sprayed on and covers every inch of a surface like a thick blanket filling in any gaps. 



  • Better resistance to fire

    Cellulose has more fire-retardancy than fibreglass and has been proven to offer better protection to structural elements in case of a fire.



  • Better resistance to mould

    Due to the boric acid treatment at the manufacturing stage, cellulose insulation is highly mould-resistant and can survive instances of mildew and mould build-up in buildings.



  • Better for the environment

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