Insulating exterior walls during winter is one of the most effective ways to keep your home warm and reduce your energy bills. Heat loss via walls can occasionally be as high as 35% in the UK’s coldest regions. Therefore, proper wall insulation is not only advantageous but also necessary.
Let’s explore the best options for exterior wall insulation with Prisma Boiler Grants. How to choose the right one for your home, and how you may be able to get it for free through government grants like the ECO4 Scheme.
Top Best 6 Types of Exterior Wall Insulation (Pros & Cons)
In order to keep a home warm during cold winter months it is important to choose the correct insulation materials. Certain types of insulation are better at holding heat, while others help to seal dampness and air leaks. The best of them are:
1. Fiberglass Insulation
Fiberglass is made up of tiny glass fibers. It is available in batts or rolls. It is a cheap product typically installed between wall studs. This could lead to the loss of heat over time.
One disadvantage is that it tends to sag after a certain period so it’s not all that effective. It also causes irritation on the skin after applying. It is however an extremely popular choice because it is simple to apply and priced at a low cost.
- Advantages: Cost-effective, simple installation, and reasonable thermal resistance.
- Con: Can sag over time, allowing air movement and can cause irritation to skin after installing.
2. Foam Board Insulation
These are , also known as stiff foam, are produced using polystyrene or polyurethane materials. Foam boards are able to be placed externally as well as between the studs which makes them easy to install.
It is more costly than fiberglass, yet it’s a more durable thermal barrier, and more durable. It is also essential to stop air leaks in the area around the perimeter of the insulation, but.
- Benefits: A high resistance per-inch, water-resistant and durability.
- Pros: You need to seal it tight to stop air leaks. It’s higher priced than fiberglass.
3. Spray Foam Insulation
It is used to seal cracks and gaps, resulting in an airtight seal. This is a great way to prevent heat loss and ensure an even temperature inside. Spray foam with closed cell is an extremely high-R-Value product and can also be used as a barrier to vapors while open-cell spray foam is more flexible. It can be utilized in applications to soundproof.
The insulation is costly however it is extremely effective. Installation by a professional is often an absolute requirement, and adds an expensive price. But, it’s one of the most efficient solutions that are available.
- Advantages: Great thermal insulation helps prevent air leakage and improves the strength of the structure.
- Con: Expensive, professional installation is required.
4. Cellulose Insulation
Manufacturers produce it using recycled paper, which makes it a green product. The majority of people blow cellulose into the wall cavity. It’s a good alternative for homes that are already in use since there is no requirement to tear out the drywall.
It also acts as an absorber of moisture, and consequently, it’s ineffective. However, despite these shortcomings it is also one of the greenest options to insulate.
- Benefits Environment-friendly and excellent thermal resistance, perfect for the soundproofing process.
- Con: Can settle over time and could require an evaporation barrier to avoid water issues.
5. Rigid Foam Board
The rigid foam panels have an excellent thermal resistance and limit the loss of heat in walls. They can be erected in a way that is external or between studs, to provide a thick layer of insulation.
- Pros: Long-lasting, moisture-resistant.
- Pros: Higher in price It requires precise installation.
6. Rock Wool Insulation
Mineral wool, also known as rock wool, is produced using natural minerals. It is a premium heat retention material that is not prone to dampness and makes it an extremely durable choice.
- Benefits: Water-repellent, fire-proof, great for applications for noise reduction.
- Con: More expensive than fiberglass, more difficult to cut and adjust.
Free External Wall Insulation Grants in the UK – Are You Eligible?
Worried about costs? You may be eligible for free exterior wall insulation through the UK Government’s ECO4 Scheme. This includes:
- Low-income households
- Tenants or homeowners on benefits
- Properties with poor EPC ratings
Check your eligibility through licensed energy providers or free insulation grant specialists at Prisma Boiler Grants.
Check If You Qualify for Free Wall Insulation Today
Choosing the right exterior wall insulation depends on your budget, property type, and climate zone. For maximum energy savings in cold climates, closed-cell spray foam and foam board are the most efficient. For soundproofing, go with mineral wool, and for budget-conscious insulation, fiberglass and cellulose are solid options.
And don’t forget—you may qualify for a free insulation grant through UK schemes like ECO4.
Check your eligibility today with Prisma Boiler Grants and make your home warmer, greener, and more cost-efficient.