Type of Loft Insulation

Types of Loft Insulation (2020)

With so many types of loft insulations in the market, which one is best for your home? We’re here to help you make the right decision. The video below shows a display that mimics the heat source that's installed in your home. It pushes warm air into three different types of loft insulation to show you how much air can flow through them. Watch the video below.

With so many insulation types on the market, which type of loft insulation is best for your home?

If you have a loft then you definitely need the best loft insulation in the market. A quarter of heat is lost through the roof in an uninsulated home. Insulating your loft, attic or flat roof is a simple and effective way to reduce heat loss and reduce your heating bills.

The problem is there are many different options for insulation. In this post, we’ll explore the different types of loft insulation and which is most effective.

With the right approach, you will need a specialist to insulate your roof.

This is not a DIY job.

Get a Free Quote Today !

Types of Loft Insulation to Choose from :

If your loft is easy to access and has no damp or condensation problems, it should be easy to insulate. With winter around the corner, we’re all turning up our heating to make sure we don’t freeze at home.

This can get expensive if you’re losing a lot of heat through the roof, but insulating your loft the right way will pay for itself in no time.

1.1 - Spray Foam Insulation

spray foam insulation in weymouth

Spray Foam Insulation is a superior product compared to all other types of loft insulation. When sprayed at rafter level, it seals the home creating an air-tight warm roof structure which contributes to keeping your home warm in winter, cool in summer whilst lowering heating and cooling costs by up to 50%, which can't be achieved with traditional insulation! 

Spray foam insulation once applied, expands to roughly 100 times its original volume and as a result fills every crack and crevice to eliminate air leakage or infiltration.

To be honest spray foam loft insulation costs considerably more than traditional insulation, but it is the most superior form of insulation on the market today. I’m sure you would agree that the cheapest solutions can end up being your most expensive mistakes. 

As well as insulating the roof, we do recommend the gables to be included to maximise efficiency. 

Check out out why people choose Evergreen’s Icynene spray foam loft insulation. Visit page here.

1.Eco Friendly: Spray foam insulation is an ecofriendly product and reduces your carbon footprint.
2.100% Water Blown: Icynene foam insulation Spray is 100% water blown with no harmful
chemical blowing agents.
3.Breathable insulation: Icynene open cell insulation allows the timbers to breathe,which
also prevents moulding and condensation.
5.Reduces Noise Pollution: Icynene Spray foam insulation minimises airborne sounds.
6.Fills all gaps: Spray foam insulation is ideal for roofs, walls, lofts, underfloor and attics.
7.Energy Saving: Helps in saving up to* 50% on your energy bills.

1.Not a DIY product: Icynene Spray foam insulation can only be installed by a licensed accredited installer,
you cannot do it from a local store.
2.Not the cheapest Solution:Not the cheapest Solution: Spray foam insulation costs more than traditional insulation methods on the market.Spray foam is not the cheapest insulation solution, but it's the most superior form of insulation on the market today.

1.2 - Fiberglass (Traditional Insulation)

Fibreglass insulation in Loft
fibreglass insulation in loft

The transfer of heat is slowed down with fiberglass insulation because the glass fibers trap air bubbles. These bubbles create an insulating effect by slowing heat exchange between areas and surfaces. 

Fiberglass insulation usually comes in batts or rolls. In order to be completely effective, fiberglass insulation must be cut carefully around obstacles such as power sockets. This can be incredibly time consuming.

Fiberglass insulation is significantly cheaper than spray foam insulation, but it is also less effective, especially in winter. Fiberglass is the most common type of loft insulation, however, is outdated and has to be topped up every 5 years because it deteriorates through condensation issues. 

Warning: The tiny fibers of glass from fiberglass insulation can irritate your skin and eyes. If you experience too much contact with fiberglass, it can cause what’s called irritant contact dermatitis, or inflammation of the skin. Breathing in fibers can also increase the difficulty of breathing according to HowStuffWorks.

Professional installation is required for spray foam insulation, where as fiberglass insulation can often be installed by homeowners themselves.


1.Fibreglass insulation does not burn
2.Fibreglass insulation is available in High and Medium density options
3.Fibreglass insulation is inexpensive
4.Fibreglass or Glasswool insulation forms a protective vapour barrier.

1.Fibreglass insulation starts SAGGING as time passes
2.Causes Skin irritation: The installers must wear protective wear when installing fibreglass to protect themselves from the "silver" released from Fibreglass.These silvers if inhaled will lead to skin and respiratory disease.
3.Harmful chemicals: Glasswool contains harmful chemicals like Formaldehyde which is
highly toxic.

1.3 - Cellulose (Traditional Insulation)

cellulose insulation in loft

Cellulose insulation includes cellulose cells that have natural insulating power. It is made of shredded paper plus a fire retardant chemical known as a borate. The paper is broken down into cellular fibers that provide insulation. 

Cellulose insulation in installed into your loft using an insulation blower. The fibers flow through a long hose and are blown / sprayed into your loft space.The blown cellulose is prone to create dust that is blown into the holes or inadequate seals around fixtures. This is a health hazard. 

Cellulose is more energy efficient than fiberglass insulation and does have better sound insulation but is still incomparable to spray foam insulation. 

Both cellulose insulation and fiberglass insulation are low cost and have a similar price per sqm. However, as cellulose insulation often requires professional installation and specialised skills, it usually turns out to be more expensive.

1.Ecofriendly product: Cellulose insulation is made from newspapers and therefore it is ecofriendly
2.Not an Expensive product: Cellulose insulation is the cheapest of all the insulation methods.
3.Energy Efficient: Cellulose is more energy efficient than fiberglass insulation.

1.Moulding and Rotting: The efficiency of Cellulose decreases due to the insulation absorbing moisture and this causes moulding and rotting.
2.Sagging: Loose fill(Cellulose) saggs as time passes and this results in the decrease of performance.
3.Health Hazard: The blown cellulose is prone to create dust that is blown into the holes or inadequate
seals around fixtures.

 Spray Foam Loft Insulation Compared to Traditional Insulation:

loft insulation comparison

The truth is fibreglass insulation allows air very slowly to pass through the small gaps which can create heat loss in the property increasing your energy prices, let's not mention that you have to replace it every 5 years. Whereas spray foam insulation creates an air barrier to prevent air from escaping and cold air from entering and it comes with a 25 years manufacturers warranty.

Still not convinced? For more information on the difference between spray foam insulation & traditional insulation visit the page here.

Get a Free Quote today !