Installing new insulation is one of the most effective ways to reduce utility bills and make your home a more comfortable place to live. Having proper roof insulation in every home is at the heart of many government schemes, initiatives and building ...
Installing new insulation is one of the most effective ways to reduce utility bills and make your home a more comfortable place to live. Having proper roof insulation in every home is at the heart of many government schemes, initiatives and building regulations. So it’s vital to ensure that your loft space and the rest of your property are adequately insulated. This affects developers erecting new build homes most of all, as well as anyone refurbishing their existing homes.
Our roof insulation includes a wide variety of options. These include:
We also stock a growing range of modern, innovative multifoil insulation, which provides maximum control over airflow into the property. You’ll also find a selection of natural insulation for homeowners looking to make their homes more eco-friendly.
Whether you need insulation at 50mm, or all the way up to 200mm loft insulation, we’ve got the perfect insulation thickness for your project. We work with an ever-growing list of top brands, including including Rockwool, Celotex, Superglass, Kingspan, Thermafleece and more. Each of the manufacturers we work with is recognised industry-wide for crafting high-quality and versatile insulation products for both residential and commercial premises.
Benefits of Roof Insulation
By improving the levels of insulation in your roof space, you’ll make your home much more energy efficient. This will help not only to keep it warmer during the winter but cooler during the summer. This is because insulation works by reducing heat transfer between the inside of your home and the outside.
New insulation will also help you save money on energy bills in the long term. According to the Energy Saving Trust, effective loft insulation could save you up to £255 per year on utility bills. What’s more, it is estimated that up to 85% of heat loss occurs through the walls, floors and roof of a property. This means you should also insulate your walls and floors.
Protect the Structure
Another added benefit of effective roof insulation is that excess moisture in your loft will be absorbed and effectively wicked away. Moisture damage or water ingress is one of the most common causes of structural damage to homes, especially the joists and battens in a roof. Modern insulation is also treated to repel pests and other infestations.
The most common insulation materials include polyisocyanurate, fibreglass, mineral wool, cellulose, polystyrene and sheeps wool. While they will all have been designed to prevent heat loss, each material also has its own advantages, including acoustic insulation, durability and more.
The core of PIR insulation boards is incredibly rigid, making it perfect for insulating walls and floors. The core is usually placed between two high-performance aluminium foil facings. The unique build-up of PIR insulation makes it a superb thermal insulator that combats thermal bridging. It also has a long lifespan and is resistant to moisture.
Fibreglass insulation is also known as glass fibre or glass wool insulation. It’s produced by heating glass fibres to a very high temperature and bonding them together. Due to the way it’s manufactured, fibreglass insulation contains millions of air pockets, making it a highly efficient thermal insulator and helping to maintain its robust structure.
Fibreglass insulation is also a fantastic acoustic insulator, making it the ideal choice for wall insulation and roof insulation. Finally, this form of insulation is fireproof and therefore a safe solution for both residential homes and commercial premises.
Mineral Wool Insulation
Mineral wool insulation is manufactured from glass fibres spun together to create a very dense roll or slab. Mineral wool insulation is a truly unique and highly versatile loft insulation solution.
Despite its lightweight, mineral wool is very dense and able to hold in place between both timber and metal frames, all without the need for additional fixings. Once installed, mineral wool is a superb thermal and acoustic insulator thanks to its porous, elastic structure. This type of insulation is also very safe and able to withstand temperatures of up to 400C.
Cellulose insulation is produced from a mix of paper, card and denim. Unlike standard insulation rolls or boards, this kind of insulation is blown into loft, wall and floor cavities. It’s perfectly suited for enclosed spaces with obstructions such as pipes and wires.
It can also be injected into finished walls, unlike most other forms of insulation. The feather-like consistency of cellulose insulation makes it a brilliant thermal insulator. All whilst being inexpensive when compared to solutions. Despite being manufactured from paper and cardboard, this insulation is treated with fire-retardant chemicals. This makes it safe for domestic and non-domestic properties.
Polystyrene insulation is manufactured from plastic and is amongst the most durable, long-lasting solutions available. It is also highly resistant to water and dampness. Due to its rigidity, this type of insulation is easy to install between the metal frame of a wall or the timber structure of a roof.
Plus, it is a relatively lightweight insulation. As polystyrene insulation can be over 95% air, it is a brilliant thermal insulator. However, it is also great for keeping the sound of a busy city or bustling town out. Containing a fire-retardant additive, this insulation is a safe solution for both residential properties and commercial premises.
Sheep’s Wool Insulation
Sheep’s wool insulation is becoming increasingly popular as loft insulation thanks to its strong performance as a thermal and acoustic insulator. What’s more, it’s far more eco-friendly than traditional manmade roof insulation. Not only is it much easier to work with as it’s non-toxic and non-irritating, but it’s also much more simple to dispose of, able to be recycled or even composted.
Have Any More Questions?
Whatever question you may have, our award-winning customer service team is here to help you. Simply use our online chat or give them a call on 01295 565 565. With over 40 years’ experience in all things DIY and roofing, they’ll be able to recommend the perfect roof insulation for your project.
Frequently Asked Questions
How Does Insulation Work?
To help you understand how insulation helps to keep your home at a more comfortable temperature, it’s useful to first understand the different ways in which heat is transferred. There are three fundamental ways, known as heat conduction, convection and radiation.
This is the way heat travels through solid material. For example, when heat travels through a ceramic mug containing a hot drink.
Convection occurs when heat travels through liquid or gas. This is how a kettle works, by boiling water at the bottom which then rises as cooler water replaces it.
Radiation is when heat travels in a straight line, warming anything in its path that can absorb energy. For example, a car bonnet being heated by the sun on a hot summer’s day.
Whichever way heat is transferred, warm air will always be attracted to cold air. This will occur until there is no difference between ambient temperatures. This is why heat is lost from your home, as the warmth generated by heating living spaces tries to escape to cooler areas around it. This could be via your loft space, exterior walls, doors or windows.
To combat this heat loss, common loft insulation materials such as PIR, mineral wool and others are designed to greatly reduce conductive heat flow. Some forms of insulation also prevent radiant heat flow via the use of innovative foils, films and papers.
How Often Should You Replace Loft Insulation?
Insulation can begin to degrade over time. This wear and tear will reduce its ability to prevent heat loss, and can even result in problems such as condensation or damp. Therefore, it’s very important that you check your insulation at least once a year. This goes for roof insulation as well as insulation in your walls and floors.
Common Problems with Insulation
Insulation can become compressed over its lifetime. This is especially common for roof insulation, where heavy items can be placed over the boards or rolls and weigh them down. This is a problem because one of the main ways in which insulation works is by trapping air in tiny pockets within the material. If your insulation becomes compressed, there will be fewer air pockets, reducing its effectiveness.
Therefore, any insulation that has suffered significant compression should be replaced. This will ensure that your roof insulation meets building regulations and perform at its best. In some circumstances, it may be as simple as placing new insulation on top of existing rolls or boards. This isn’t always the case however, so be sure to follow the manufacturer’s recommendations.
If you’re experiencing severe condensation or you’ve suffered a leak in your home, your roof insulation may have become damp. This excess moisture will fill the air pockets within the insulation, affecting its ability to prevent heat loss. Depending on the insulation material used it can even result in the release of dangerous mycotoxins.
Any damp or wet insulation should be replaced as soon as possible. If the dampness has been caused by condensation, you should consider improving the ventilation in your roof space. It’s important to remember never to place new insulation over damp insulation, as this moisture will simply spread and render the new material useless.
Unfortunately, insulation can also be the ideal home for pests such as rats, mice and insects. When inspecting your roof space therefore you may find some unwanted visitors. While this won’t affect the performance of your insulation, it can cause it to become dirty, smelly or even damp from urine. Any infested roof insulation should be replaced as soon as possible to prevent the problem from becoming more severe. You should also make sure to check the condition of the surrounding timber.
What is a U-Value?
Different parts of your property will be awarded a U-value, including the walls, floors and roof. The U-value denotes thermal transmittance, or the rate of heat transfer through a structure. A U-value isn’t attributed to the materials in your walls, floor or roof, but rather the full combination of materials.
For example, when calculating the U-value of a roof you may take the roof tiles, roof insulation, and timber materials used into account. U-values are measured in watts per square meter per kelvin (W/(m²K)). The lower the U-value, the more slowly heat transfers through it.
A building with lower U-values is, therefore, typically able to maintain its heat more effectively. Reducing its carbon footprint and cutting energy bills. There are strict requirements throughout the UK that require different parts of a property to achieve certain U-values. The U-value required can range from 0.16 W/(m²K) to 0.36 W/(m²K). But these are subject to change and should be confirmed with your local authority.
What is an R-Value?
An R-value is the measure of how well a two-dimensional barrier resists heat transfer. As loft insulation materials come in a variety of thicknesses, a unique R-value will be calculated for each. If a material is made up of multiple layers, you would combine each layer’s R-value. R-values are measured in meters square kelvin per watt (m²K/W). The higher the R-value, the more effective a material is at preventing heat transfer.
Whilst R-value and U-value are entirely different, the R-value of your materials will influence the U-value awarded to parts of your building. The recommended R-value is dependent upon the material. The application can also influence the required R-value for each material. For example, homes in the UK should have at least 270mm of insulation and any loft insulation should have an R-value of between 6.1 and 7.
Can I Get Free Loft Insulation?
Yes, depending on your circumstances. Money Saving Expert states that Energy firms are offering free cavity wall and loft insulation worth up to £1,100 for free if you own your own home and meet certain criteria. If your home is inadequately insulated, then installing proper loft insulation is a very wise investment. You could potentially save hundreds of pounds every year on your energy bills.
It was previously the case that landlords were able to get free cavity wall and loft insulation through the Cocoon scheme, run by the United Sustainable Energy Agency. However, this scheme was ended in 2012.
Landlords do have to be aware however that thanks to the Energy Act 2011, any tenant requesting reasonable improvements to the energy efficiency of the property they rent must receive them. In addition to this, it is also unlawful to rent out a property that does not meet an Energy Performance Certificate Rating of ‘E’.
Can You Top Up Loft Insulation?
Yes, it’s possible for you to top up existing loft insulation. Typically, old insulation will not need to be removed and replaced completely as it will still retain its thermal properties. A full removal and replacement are usually only required if the roof insulation has severely degraded. This could be due to factors such as damp or infestation.
What Loft Insulation Grants are Available?
There are a number of government grants for loft insulation available to homeowners in the UK. If you’re looking to improve your home’s thermal efficiency, it’s a great place to start. Improving the quality of the insulation in your home, particular loft and cavity wall insulation can save you up to £300 on your yearly energy bills!
Does Loft Insulation Between Rafters Cause Condensation?
Pitched roof or loft insulation installed between rafters can make your loft space colder. This could cause further damp or condensation if there’s already a problem. If this is the case you may need to increase ventilation in the space to help prevent excess moisture. This can be achieved through the use of ridge, eaves and tile vents.