Best Insulation Upgrades for UK Homes | Save Energy

UK homes often suffer from inefficient insulation, leading to higher energy bills and uncomfortable living conditions. With rising energy costs, it’s crucial to address insulation to maximize comfort and minimize expenses.

Insulation Product Comparison

Product	Best for	Material	Typical Cost	Installation Type	R-Value	Price
Majosta DIY Home Insulation Book 2: Attics and Lofts	Best Overall	—	—	DIY guide	—	Check price
SuperFOIL Radpack Radiator Insulation Foil	Best for Radiators	Reflective foil	—	DIY peel and stick	—	Check price
Generic Transparent PVC Strip Curtains	Best for Doorways	PVC strips	—	Hanging strips	—	Check price
From Cold to Gold: UK Guide to Home Sustainability	Best for Sustainability	—	—	Guide book	—	Check price
Siless Liner Car Sound Deadening & Heat Insulation Foam	Best for Vehicles	Closed cell PE foam with aluminum	—	Peel and stick	—	Check price

Top Insulation Products for UK Homes

1

Best Overall

Majosta DIY Home Insulation Book 2: Attics and Lofts

Best for: Homeowners upgrading loft insulation for heat retention

This comprehensive guide covers insulating roof spaces and loft conversions, making it ideal for DIYers aiming to reduce heat loss through the loft. It delivers detailed advice on materials and installation techniques, helping homeowners improve comfort and lower heating bills. Perfect for those who want to understand and tackle loft insulation upgrades themselves.

• TypeGuide book
• FocusAttics and lofts
• BrandMajosta

Pros

• Detailed step-by-step instructions
• Focuses on attic and loft insulation
• Suitable for DIY installation

Cons

• Requires time and effort to read and apply
• No physical insulation material included

Skip it if: Skip if you prefer ready-to-install insulation products.

Check price on Amazon

2

Best for Radiators

SuperFOIL Radpack Radiator Insulation Foil

Best for: Homeowners wanting quick radiator heat reflection improvements

SuperFOIL Radpack reflects up to 95% of heat back into rooms, boosting radiator efficiency and reducing energy waste. It’s easy to install with adhesive pads and scissors, ideal for quick DIY upgrades behind radiators. The product is made with up to 40% recycled material and complies with UK and EU building regulations, ensuring safety and sustainability.

• Size0.6m x 5m
• Heat ReflectionUp to 95%
• MaterialReflective foil
• BrandSuperFOIL

Pros

• Reflects up to 95% of heat
• Fits up to 5 radiators per sheet
• Easy installation with adhesive pads
• Made with recycled materials

Cons

• Limited to radiator use only
• Foil can be delicate if not handled carefully

Skip it if: Skip if you need whole-room insulation rather than radiator-specific solutions.

Check price on Amazon

3

Best for Doorways

Generic Transparent PVC Strip Curtains

Best for: Improving thermal separation in doorways and high-traffic areas

These PVC strip curtains block drafts and reduce heat loss while allowing easy passage, making them ideal for doorways in homes, warehouses, or outdoor areas. The durable, water-resistant PVC withstands temperature changes and is easy to clean. Custom sizes are available for tailored installations, suitable for spaces where frequent access is needed without sacrificing insulation.

• Size135x230cm
• MaterialPVC
• BrandGeneric

Pros

• Durable and water-resistant PVC
• Reduces energy loss at doorways
• Customizable size options
• Easy to install

Cons

• Not a substitute for wall or loft insulation
• May not suit all home aesthetics

Skip it if: Skip if you need insulation for walls or lofts rather than entrances.

Check price on Amazon

4

Best for Sustainability

From Cold to Gold: UK Guide to Home Sustainability

Best for: Homeowners seeking a broad guide on insulation and energy upgrades

This guide shares real-life experience transforming an older UK home with insulation, heat pumps, solar, and EPC improvements. It offers insights into sustainable upgrades beyond insulation alone, helping readers plan comprehensive energy efficiency projects. Ideal for those considering multiple home energy improvements together.

• TypeGuide book
• FocusSustainability and energy upgrades
• Brand—

Pros

• Covers insulation and renewable energy
• Focus on UK homes and regulations
• Shares practical transformation experience

Cons

• Not a product or material, but a guide
• Less focused on specific insulation details

Skip it if: Skip if you want specific insulation products rather than a broad energy upgrade story.

Check price on Amazon

5

Best for Vehicles

Siless Liner Car Sound Deadening & Heat Insulation Foam

Best for: Insulating vehicle surfaces against heat and noise

Siless Liner is a closed-cell polyethylene foam with an aluminum foil finish designed to block up to 98% of radiant heat and reduce vibration noise. Its waterproof, lightweight, and flexible properties make it easy to apply inside vehicles, protecting against engine and exhaust heat. This product suits vehicle owners wanting thermal and acoustic insulation rather than home insulation.

• Thickness157 mil / 4 mm
• Coverage36 sq ft
• MaterialClosed cell PE foam with aluminum finish
• BrandSiless

Pros

• Blocks 98% radiant heat transfer
• Waterproof and lightweight foam
• Flexible for easy vehicle installation

Cons

• Not designed for home use
• Limited coverage area per roll

Skip it if: Skip if you need home insulation rather than automotive solutions.

Check price on Amazon

How to Choose the Right Insulation

Start by understanding insulation materials and their R-values, which measure thermal resistance. Higher R-values indicate better insulation. Common materials include mineral wool, expanded polystyrene (EPS), polyurethane foam, and reflective foil. Each has strengths: mineral wool resists fire and noise; EPS is lightweight; foam offers high R-values per inch; reflective foil works by reflecting radiant heat.

Check your home’s current insulation by inspecting the loft, walls, and floors. Look for gaps, compression, or damp spots. A professional energy audit can provide exact heat loss data. For a DIY check, measure loft insulation thickness; UK building regulations recommend around 270 mm for lofts.

Consider installation type. DIY kits suit lofts and simple wall cavities. Professional installation is safer and more effective for complex cavities, solid walls, or external insulation. Off-grid homes in windy areas benefit from dense, wind-resistant insulation like closed-cell foam or mineral wool, which withstands air infiltration better.

Weight matters for structural load. Lightweight insulations like EPS or foam suit lofts and walls without extra support. Heavier materials like mineral wool need secure fixing. Avoid overly heavy insulation in older buildings unless the structure is assessed.

Sizing and Heat Output for Insulation

Calculate insulation size by measuring the area to cover. For lofts, multiply length by width; for walls, multiply height by width of the insulated section. Include multiple layers if adding on top of existing insulation.

Thickness depends on the material and room use. UK guidelines recommend loft insulation thickness of about 270 mm, while cavity wall insulation usually requires 50 to 100 mm. Thicker insulation increases R-value and heat retention but adds cost and may need structural consideration.

Insulation reduces heat loss by slowing conduction and convection. Thicker or higher R-value insulation keeps more heat inside, lowering heating demand. A 270 mm mineral wool loft layer can reduce heat loss by up to 50% compared to no insulation.

Understanding Running Costs and Savings

Insulation extension projects must comply with UK building regulations, which set minimum standards for thermal performance and fire safety. Always check local codes before starting an upgrade to avoid costly corrections.

Using certified installers ensures the work meets safety and quality standards. Certified professionals understand how to handle insulation materials safely and install them to prevent gaps, moisture buildup, and fire hazards.

Improper insulation can cause safety risks such as fire, mold growth, and poor indoor air quality. Materials that trap moisture or are installed near heat sources without proper clearance increase these dangers.

While houseplants can improve indoor air quality, they do not improve insulation. They cannot replace proper insulation materials or installation methods for energy savings.

For a safe and effective insulation upgrade, hire a professional certified under schemes like the National Insulation Association or similar UK bodies. This also helps with compliance and eligibility for any grants or support.

Safety and Certification in Insulation Installation

Insulation extension projects must meet UK building regulations to ensure safety and effectiveness. These regulations set minimum thermal resistance levels and require fire safety measures to prevent hazards.

Using certified installers is essential. Certified professionals follow building codes and use approved materials. They also know how to maintain ventilation and avoid common risks like compressing insulation, which reduces its effectiveness.

Houseplants do not improve insulation. While they can slightly increase humidity and air quality, they do not reduce heat loss through walls or roofs. Proper insulation requires materials designed to resist heat flow.

Grants and Support for Insulation Upgrades

UK grants and financial schemes help cover insulation costs to improve energy efficiency. These include government-backed programs targeting low-income households and those with older properties.

To apply for energy efficiency grants, homeowners usually need evidence of income or property age, and must choose approved insulation options. Applications often require estimates from certified installers.

Choosing a trustworthy installer involves checking for certification from recognized bodies. Certified installers provide compliance certificates needed for grant applications and guarantee work meets safety standards.

Look for installers registered with government or industry schemes. This protects homeowners from poor workmanship and ensures eligibility for financial support. Always ask for references and proof of certification before hiring.

For more tips on choosing insulation upgrades and installers, see our guide to easy insulation upgrades for beginners.

Frequently Asked Questions