Thermal Insulation

Thermal insulation helps maintain stable indoor temperatures and improves a building’s overall energy efficiency year-round. When properly installed, it enhances heat retention and lowers heating costs.

What Is Thermal Insulation?

Thermal insulation refers to the materials that limit the transfer of heat between surfaces. Reducing heat transfer helps maintain a steady indoor climate and enhances overall property comfort.

In practical terms, thermal insulation in UK is typically fitted within walls, floors, and roofs to form a continuous thermal envelope that helps meet Part L of the UK Building Regulations. Thermal insulation boards, sheets, and slabs are the most common products used to attain this balance of comfort and efficiency.

What Is Thermal Insulation Used For?

Thermal insulation is used across a wide range of applications, including:

• Homes and residential buildings.
• Commercial spaces.
• New builds and retrofits.
• Industrial facilities – to control heat in production and storage environments.
• Some thermal insulation materials also enhance acoustic comfort.

Essentially, it’s the go-to solution for preventing unwanted indoor heat gain or loss.

Types Of Thermal Insulation

Almost all insulation provides some level of thermal performance, but the materials vary in form and function. Insulation Wholesale stocks a comprehensive range of thermal insulation in the UK, available as:

• Thermal insulation boards – These are rigid and durable. Ideal for walls, roofs, and floors.
• Thermal insulation slabs – These are flexible and dense. Excellent for thermal and sound control.

Our selection includes all types featured on our thermal insulation product pages, so you can find the exact material for your project.

Benefits Of Home Thermal Insulation

Fitting quality thermal insulation brings lasting advantages, including:

• Energy savings.
• Lower heating costs.
• Comfort, with balanced indoor temperatures in every season.
• Condensation control.
• Noise reduction, as some materials also absorb sound, leading to quieter interiors.
• Sustainability, where reduced energy use translates to a smaller carbon footprint.
• Helps meet thermal performance requirements under UK Building Regulations (Part L).
• Higher property value, since homes with strong insulation often achieve higher EPC ratings.

Why Choose Our Thermal Insulation?

Here is what makes Insulation Wholesale the trusted store of choice for thermal insulation in the UK:

• High-performance materials from trusted UK brands, including Celotex, Kingspan, and Rockwool.
• Expert advice for different projects.
• Competitive prices across our complete product range.
• Fast nationwide delivery (typically 1–3 working days, unless otherwise stated on the product page or at checkout).
• Friendly support from insulation specialists who understand your needs.

Whatever your project size, we make it easy to get the proper insulation fast.

Insulating a new build or improving an older property? We’ll help you find the perfect solution.  Browse our selection of thermal insulation boards, sheets, and slabs today, and shop online to enjoy expert service, trusted brands, and quick nationwide delivery.

FAQ

Why is thermal insulation used in buildings?

Insulation limits heat transfer across surfaces, such as the floor, roof, and walls. When this occurs, the rate of heat retention increases, allowing the building to stay warm or cool, depending on the prevailing weather conditions. Some materials also absorb sound, improving acoustic comfort.

How does thermal insulation work?

It works by forming a barrier that slows the transfer of heat between warm and cold spaces. Materials like mineral wool, phenolic foam, and PIR entrap air within their structure, making it harder for heat to penetrate. Some also use reflective layers to reduce radiant heat transfer.

How to install thermal insulation

The installation procedure depends on the product type.

• For panels or sheets, cut to fit and then fix to the surface mechanically or with adhesive.
• For slabs or rolls, fit between studs, rafters, or joists. Insulation can also be installed above or below studs, joists, or rafters, depending on the structural design and the specific application.
• Use joint tape or expanding foam to seal joints and gaps for an airtight finish.

Always follow the manufacturer’s installation guide and wear suitable protective gear.

Where is thermal insulation used?

Thermal insulation is effectively used in new builds and refurbishments of residential and commercial developments. It should be installed in areas where heat might escape, such as ceilings, roofs, floors, and external and internal walls, depending on construction type.