Wall Insulation: Everything You Need to Know

When it comes to improving energy efficiency and enhancing comfort in your home, wall insulation is one of the most effective and affordable solutions available. At Kent Insulation, we understand that navigating the world of insulation can feel overwhelming, especially with so many options, materials, and benefits to consider. This guide will break everything down in a friendly and informative way to help you make the best choice for your property.

Why Wall Insulation Matters

Walls are one of the largest surfaces in your home, and without proper insulation, they can be a major source of heat loss in the winter and heat gain in the summer. This means your heating and cooling systems have to work harder, which drives up your energy bills and reduces comfort.

Properly insulated walls help:

• Maintain a consistent indoor temperature year-round

• Lower heating and cooling costs

• Reduce outside noise

• Decrease your carbon footprint

Whether you're renovating an existing property or building a new one, insulating your walls is a smart investment.

Types of Wall Insulation

There are two main types of wall insulation: internal and external. Let’s explore both.

Internal Wall Insulation

Internal wall insulation involves adding insulating materials to the inside walls of your home. This method is common in older buildings where retrofitting external insulation may not be feasible.

Pros:

• Typically less expensive than external insulation

• Ideal for individual room upgrades

• Can be done room-by-room

Cons:

• Slightly reduces room size

• May require redecorating afterwards

Common materials used:

• Rigid foam boards

• Insulated plasterboard

• Mineral wool batts

External Wall Insulation

External wall insulation involves fixing a layer of insulation to the outside of your property, then covering it with a protective finish such as render or cladding.

Pros:

• Doesn’t affect interior space

• Improves external appearance of the building

• Adds weatherproofing and soundproofing

Cons:

• Generally more expensive

• Planning permission may be required in some areas

Choosing the Right Material

There are several insulation materials available, each with its own strengths.

• Fibreglass (Glass Wool): Affordable, easy to install, and fire-resistant

• Rock Wool (Mineral Wool): Excellent soundproofing and thermal properties

• Polystyrene (EPS or XPS): Lightweight and moisture-resistant

• Polyisocyanurate (PIR): High thermal resistance, thin profile

• Natural options: Sheep’s wool, hemp, and cellulose are eco-friendly choices

When choosing a material, consider factors such as your wall type, budget, climate, and environmental priorities.

Installation Tips

While DIY insulation is possible for certain materials and internal wall projects, we always recommend consulting a professional like Kent Insulation to ensure correct installation. Improper insulation can lead to issues such as moisture build-up, mold, and reduced performance.

Professionals will:

• Assess your property’s specific needs

• Recommend the best insulation solution

• Ensure safety and compliance with building codes

• Minimise disruption during installation

Wall Insulation for Different Wall Types

• Solid Walls: Typically found in homes built before the 1920s, solid walls can be insulated internally or externally.

• Cavity Walls: These walls have a gap between two layers and are commonly insulated by injecting insulation into the cavity.

Each type requires a tailored approach, and Kent Insulation has the expertise to guide you through it.

Cost vs. Savings

The upfront cost of wall insulation varies depending on the method and materials used. However, it should be viewed as a long-term investment. Most homeowners find that insulation pays for itself within a few years through reduced energy bills. Plus, you may be eligible for government rebates or incentives to offset costs.

Environmental Impact

Beyond cost savings, wall insulation plays a crucial role in reducing greenhouse gas emissions by lowering energy consumption. Using sustainable materials can further boost your home’s eco-credentials.

Final Thoughts

Wall insulation might not be the most glamorous home upgrade, but it's one of the most impactful. Whether you're aiming to save money, stay warm, or reduce your carbon footprint, wall insulation is a simple step that delivers long-term rewards.

At Kent Insulation, we're here to make your insulation journey easy and stress-free. Our experienced team is happy to answer any questions, provide free assessments, and deliver high-quality installation tailored to your needs.

Get in touch with us today to explore how wall insulation can transform your home or building for the better!