What Is Differences Between Cellulose, Fiberglass, And Spray Foam Insulation?

Insulation may be defined as anything that prevents an unreasonable amount of heat from entering or leaving a building. In general, heat will have the opposite impact on the comfort level in your home and the monthly electricity expenditures.
During the winter, your heating expenses go up because heat energy from your furnace naturally escapes to the colder outside; during the summer, your cooling expenses go up because heat from the outside penetrates your air-conditioned living rooms, causing your air conditioner to run for more extended periods to make up for the difference.
Insulation stops heat from passing through building materials like wood, which transfer and radiate heat; therefore, it’s essential for building energy efficiency. To rate it, an R-value, which is a number that shows relative heat resistance, is used.

person in blue pants sitting on brown wooden floor
Most house insulation improvements are performed in the attic since it is the most accessible place. Because heat tends to rise throughout the winter months. A significant volume of warm air escapes through the ceilings of living areas and into the colder attic.

During the summer, the situation is precisely the reverse: solar radiation causes the attic to become excessively hot, and heat radiates through the top into the rooms below. The loft transfers either 25% of the heat lost or gained by most houses.

When Do We Have Enough?

As the cost of energy continues to grow, the rules established by the Department of Energy about the appropriate level of insulation are often revised. If your house is 10 years old or older and the insulation has not been updated, then the Department of Energy (DOE) considers it under-insulated.
A house that is well-insulated and has secure seals often has heating and cooling costs up to forty per cent less expensive than those of a home with inferior insulation.

Spray foam, fibreglass batts, and cellulose loose-fill are the three varieties used most often nowadays.
That is something that falls under the category of house insulation.


Insulation Made of Fiberglass

Fibreglass batts are the most common kind of insulation used in residential construction. The fluffy pink cotton candy-like material that can be purchased in roll form at the local home improvement shop is what we are referring to here.
Fibreglass consists of a layer of spun glass fibres sandwiched between a paper and foil backing. It is then pre-cut to standard widths to be installed in the spaces between attic ceiling joists and wall studs. Due to the ease with which they may be rolled out, fibreglass batts can be quickly installed.

In most cases, an R-value of 3.2 per inch may be expected from attic fibreglass insulation. Multiplying the total depth in inches of fibreglass batts placed by 3.2 will allow you to determine whether or not you need to add additional to fulfil the current minimum criteria.


  • One of the benefits of using fibreglass insulation is its low price. In the consumer market, fibreglass insulation is the most readily available insulating material and has the lowest price point.
  • If pre-cut fibreglass batts are being installed in the attic, installing specialist tools or expertise is unnecessary. It is a job that may be accomplished by any insulation contractor.
  • Many people choose to increase the insulation by adding additional layers of fibreglass batts on top of the existing insulation layers until they suggest the depth suggested. It is an effortless do-it-yourself project that can be completed on a chilly day in the loft.


  • Out of the three different materials, fibreglass has the R-value that is the lowest.
  • Since fibreglass batts are one-piece blankets, it may be difficult to fully cover the attic floor since they do not fit well in the numerous odd-sized cracks found in most attics. It can be a challenge because having a uniform level of insulation throughout the attic is essential.
  • The whole coverage is still challenging to get, but this obstacle may be overcome by slicing the fabric into various smaller shapes and sizes according to the requirements of each situation.
  • The optimum place for fibreglass batts is on the attic floor; they should not be installed within preexisting walls. The installation of batts would need the opening of the whole wall.
  • Unless you are doing a complete remodel of your home and have already begun knocking down the walls, using fibreglass batts as insulation is not an option.

Cellulose Insulation

Cellulose is a loose-fill material made up of tiny fragments of paper and fabric that have been treated with a fire retardant and then crushed into a powder.

Using hoses, it is blasted into the attic, and the cracks and gaps between the walls under the pressureFreshlyf freshly piled appear on the attic floor after cellulose loose-fill insulation has been installed.

Cellulose has an R-factor of at least 3.8 per inch, which is a bit higher than the R-factor of fibreglass batts.


  • Cellulose gives superior coverage without needing custom-fit pieces since the attic floor is filled with loose particles that are blown in. It is because the particles are blown in.
  • Cellulose is often the most accessible material when replacing insulation in an attic. Adding a substantial layer of cellulose may reduce the amount of air that escapes, preventing the passage of heat.
  • Cellulose has some soundproofing properties that reduce noise transmission of noise throughout the house. These properties can be found in the walls and the attic of the house, and they can be blown into existing walls through small access hoses. This contrasts with tearing down the entire fence when using fibreglass batts, which must be done.


  • It has a higher initial investment than fibreglass, must be installed by a professional rather than a do-it-yourselfer, and calls for a motorized hopper, high air pressure, and big diameter pipes.
  • If cellulose becomes wet and saturated from a water source — for example, a leaking roof in the attic — it does not dry out rapidly and may produce a climate favourable for mould formation.
  • If the wet region is significant and there is an issue with hazardous mould development, the material could need to be removed. It is essential to inspect the roof’s state and make any required repairs before beginning the cellulose installation.


The insulation provided by spray foam

A chemical reaction occurs when two liquid chemical components are combined and sprayed onto a surface, such as the underside of a roof or into the gaps of the wall, to make spray polyurethane foam insulation, also known as SPF. It may be done to reduce heat loss and increase energy efficiency.

Before it dries into a complex cellular structure with excellent insulating capabilities, the rapidly expanding mixture that has been applied fills in cracks and gaps caused by the uneven surface.Compare The Differences Between Cellulose, Fiberglass, And Spray Foam Insulation To See Which One Is Right For You
Regarding SPF effectiveness, there are two different varieties: closed-cell and open-cell. While closed-cell foam provides superior resistance to water and enhanced insulating characteristics, open-cell foam is available at a lower cost. Open-cell foam is also more substantial and more rigid than closed-cell foam.


  • An R-factor that is very in favour, The R-factor of closed-cell insulation may regularly approach 6.0 per inch, whereas the R-factor of open-cell insulation typically offers around -3.5 per inch. Open-cell insulation is thus the superior insulating solution.
  • Adaptable to use on a wide variety of surfaces, Wherever it is sprayed, spray foam insulation (SPF) closes cracks and provides effective air sealing. It forms a continuous insulating barrier that covers uneven surfaces, including curves and corners.
  • Capable of blocking out sound in a very effective manner.
  • It is also possible to spray it into wall cavities via access holes without first exposing the whole wall.


  • The costs may be up to twice as high as those of fibreglass batts or cellulose loose-fill, making it the most expensive option. It makes it the least desirable choice.
  • With becaunecessary vast expertise necessary, the mixing and application of spray foam insulation can only be done correctly by qualified professionals.
  • The possibility of excessive application, which would lead to a rise in costs. An excessive spray may be given if it is not sprayed correctly and consistently. It will increase both the depth and the price.
  • If you spray a sealant on the wooden bottom of the roof sheathing, you can prevent moisture from entering the wood that has seeped through the shingles.
  • It might speed up the process of those materials deteriorating and falling apart. Some individuals, particularly those genetically predisposed, may have an allergic reaction to the components of the spray foam formulation and have symptoms as a result.

Leave a Comment

Your email address will not be published. Required fields are marked *