Fiberglass Insulation – Everything you need to know
Fibreglass insulation is one of the most popular and effective ways to insulate your home, generally used as loft insulation in the UK. It offers numerous benefits, from improving energy efficiency to reducing noise. This comprehensive guide will cover everything you need to know about fibreglass insulation, including its benefits, installation process, costs, and how it compares to other types of insulation.
What is Fibreglass Insulation?
Manufacturers weave fine glass fibbers together to create fibreglass insulation, a material that traps air to provide thermal and acoustic insulation. It comes in various forms, such as batts, rolls, and loose fill, making it versatile for different applications.
Benefits of Fibreglass Insulation
- Energy Efficiency: Fibreglass insulation helps to maintain a consistent temperature in your home, reducing the need for heating and cooling. This can lead to significant savings on energy bills.
- Cost-Effective: Compared to other insulation materials, fibreglass is inexpensive and provides excellent value for money.
- Fire Resistant: As it is made from glass, fibreglass insulation is naturally non-combustible, providing an added layer of safety to your home.
- Noise Reduction: Fibreglass insulation is also a good sound absorber, helping to reduce noise from outside and between rooms.
- Environmental Impact: Many fibreglass insulation products are made from recycled materials, contributing to sustainability efforts.
Types of Fibreglass Insulation
- Batts and Rolls: These are pre-cut panels of insulation that fit between the standard spacing of wall studs, floor joists, and ceiling rafters. They are easy to install and ideal for DIY projects.
- Loose-Fill: This type of insulation is blown into spaces using special equipment. It is perfect for hard-to-reach areas and irregularly shaped spaces.
- Rigid Boards: These are dense panels of fibreglass used for insulating foundations and basement walls.
Costs of Fibreglass Insulation
The cost of fibreglass insulation varies based on the type, thickness, and installation method. Here are some examples from Bradfords:
- Batts and Rolls: Prices range from £8.60 to £12.90 / m2. For example, Knauf Earthwool Loft Roll 44 Combi-Cut 100mm costs around £21.60 per roll, covering 2.32 / m2.
- Loose-Fill: Typically priced at £12.90 to £17.20 / m2. The Knauf Insulation Loft Roll 44 is a popular choice, costing about £27.50 for a roll covering 1.73 / m2.
- Rigid Boards: These can range from £17.20 to £25.80 / m2. The Celotex XR4000 is available at around £42.00 per board, covering 2.88 / m2.
For more details and up to date pricing, visit Bradfords.
Comparison of Insulation Values
The effectiveness of insulation is measured by its R-value, which indicates its resistance to heat flow. Higher R-values signify better insulating properties. Here is a comparison of the R-values for different types of insulation:
| Insulation Type | Material | R-Value per Inch | Typical Cost per m2 | Low Frequency (knocks) | High Frequency (voices) |
|---|---|---|---|---|---|
| Fibreglass | Glass fibres | 2.2 – 2.7 | £8.60 – £25.80 | Effective | Effective |
| PUR (Polyurethane) | Foam | 6.0 – 6.5 | £16.15 – £32.30 | Less effective | Less effective |
| PIR (Polyisocyanurate) | Foam | 6.5 – 7.0 | £16.15 – £37.60 | Less effective | Less effective |
| Polystyrene (EPS/XPS) | Foam | 3.6 – 5.0 | £10.75 – £26.90 | Effective | Effective |
| Wool Insulation | Wool fibres | 3.0 – 3.7 | £12.00 – £28.00 | Highly effective | Highly effective |
| Mineral Wool | Mineral fibres | 3.0 – 3.3 | £10.00 – £30.00 | Highly effective | Highly effective |
Can You Install Fibreglass Insulation Yourself?
Yes, you can install fibreglass insulation yourself. It is a suitable DIY project, especially for common applications like insulating lofts. Fibreglass insulation is user-friendly and can be handled with basic tools and safety precautions, making it an ideal choice for homeowners looking to save on professional installation costs.
Installation Process
- Preparation: Ensure you have the right safety equipment, including gloves, long sleeves, and a mask, as small fibreglass particles can irritate the skin and lungs.
- Measurement: Measure the areas where you will install the insulation to determine how much material you will need. Pay attention to building regulations to ensure you have the correct thickness of insulation.
- Cutting: Use a sharp utility knife to cut the batts or rolls to fit snugly into the spaces between studs, joists, or rafters.
- Placement: Place the insulation in the desired areas, ensuring there are no gaps or compressions.
How to Maintain Fibreglass Insulation?
Fibreglass insulation is, hardwearing but can deteriorate faster than other forms of insulation, especially when used in lofts as it is more exposed. Here are some maintenance tips:
- Regular Inspection: Check your insulation periodically for signs of damage or compression, especially after severe weather conditions.
- Pest Control: Ensure that your home is well-sealed to prevent pests from nesting in the insulation.
- Moisture Control: Keep an eye out for any signs of moisture, as it can reduce the effectiveness of the insulation and promote mould growth.
Some of the best Manufacturers of Fiberglas insulation in the UK
- Johns Manville
- Guardian
- Knauf
- Owens Corning
Fibreglass insulation is a reliable and cost-effective solution for improving your home’s energy efficiency and comfort. By understanding its benefits, types, costs, and installation process, you can make an informed decision and enjoy a well-insulated home. Whether you’re a DIY enthusiast or planning to hire a professional, fibreglass insulation is a worthy investment for any homeowner.
For more information on home improvements, government grants for energy efficiency, or renewable energy options, feel free to explore our other guides and resources.
