AeroCork™ Insulation: Cork Plaster for Cold Walls, Heat Loss, Thermal Bridging, Condensation and Retrofit Projects

AeroCork™ Insulation: The High Performance Cork Plaster for Cold Walls, Heat Loss, Thermal Bridging, Condensation and Retrofit Projects

If you are dealing with cold walls,  heat loss, thermal bridging, condensation, or rooms that never quite feel comfortable, you are not alone.

Across the UK, thousands of properties struggle with heat loss, cold bridging, and moisture build up. Traditional insulation solutions can be disruptive, expensive, and not always suitable for older or complex buildings.

This is where AeroCork™ insulation comes into play.

AeroCork™, developed by TIWI CorkSpray and supplied by VIPEQ UK (Trading as TIWI CorkSpray), is a high performance Cork based insulating plaster layer enhanced with Aerogel, designed for projects where space is the priority but insulation performance cannot be compromised.

This is unique performance-led internal wall insulation solution, built for existing walls, where losing space is not an option.

What is AeroCork™?

AeroCork™ is a thin application high performance cork plaster insulation coating, that combines natural cork with aerogel technology to improve thermal performance, on existing plastered and painted surfaces, proving the building a thin internal wall insulation system.

It is applied directly to internal walls, not back to the brick, creating a seamless, breathable insulating layer that helps:

• Reduce heat loss

• Eliminate cold spots

• Improve comfort

• Lower condensation risk

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Unlike traditional insulation boards or fibreglass rolls that deteriorate over time, AeroCork™ works as a thin, flexible coating, that is installed to the existing walls, not back to brick, making it ideal for retrofit and heritage projects where breathability, space and disruption are concerns.

AeroCork™, won’t deteriorate over time. Even 50 years from now, the cork coating will still be performing, unlike insulation materials such as fibreglass that can sag, settle, or lose effectiveness over time.

What is Cork Plaster Insulation?

Cork plaster insulation is a modern approach to internal wall insulation that offers both performance and practicality.

Made from natural cork, it provides:

• Thermal insulation

• Acoustic improvement

• Breathability (vapour permeable)

• Mould resistance

It is widely used in:

• Retrofit projects

• Period and conservation properties

• Modern builds needing targeted insulation improvements

• Instead of building out walls with rigid boards, cork plaster is applied directly to the surface, creating a continuous insulating layer without gaps or joints.

Why AeroCork is Different

Not all cork plasters are the same.

AeroCork™ sits at the top end of the VIPEQ UK range because it is specifically designed for maximum insulation performance, as a cork coating.

1. Aerogel Enhanced Performance

AeroCork™ includes aerogel, one of the most effective insulating materials available.

This gives it a significantly lower thermal conductivity compared to standard coatings, meaning better heat retention and improved energy efficiency.

2. Built for Cold Bridges and Problem Areas

Cold bridges are one of the biggest causes of:

• Condensation

• Damp patches

• Black spot mould

AeroCork is designed to tackle these directly, making it ideal for:

• Window reveals

• Internal Walls

• External junctions

• Structural weak points

• Thermal bridges

• Cold walls

3. Breathable and Moisture-Resistant

Unlike many insulation systems that trap moisture, AeroCork™ is vapour permeable. 

This allows walls to breathe, helping reduce the risk of condensation, thermal correction and long-term damp issues.

4. Lightweight and Practical to Apply

Despite its performance, AeroCork™ is extremely lightweight and workable, making it suitable for:

• Plasterers

• Renderers

• Insulation installers

It can also support leveling and repair work depending on the substrate.

Key Benefits of AeroCork™ Insulation

Improves thermal performance and reduces heat loss

Reduces condensation risk by raising surface temperature

Helps prevent mould growth in problem areas

Improves acoustic comfort with sound reduction by up to 38 dB

Breathable application that supports healthy buildings

Sustainable and eco-friendly, made from natural cork

Fire resistant and tested to recognised standards

Technical Performance

AeroCork™ is not just a concept. It is tested and proven.

Thermal conductivity (lambda): 0.04 W/mK

Thermal resistance: 0.85–0.87 m²K/W

Acoustic reduction: Up to 38 dB

Fire classification: Bs2d0 and Broof (t1)

These figures position AeroCork™ as the highest and best high-performance cork internal insulation solution for both residential and commercial environments.

AeroCork™ Cork Plaster vs Cork Spray (Spray Cork Insulation)

Choosing the right product depends on your objective.

Choose AeroCork™ Insulation if:

• Internal Insulation is the priority

• You are tackling internal cold walls or heat loss

• You need to resolve condensation or cold bridging

• External coatings isn't an option

• Internal thickness is a limitation

• You require a breathable system

Choose Cork Spray (Spray Cork Insulation) if:

• You want a pre-coloured protective coating externally

• You have tired rendering, brickwork or cladding substrates

• You prefer a thinner, lower-cost application compared to insulation boards

• You require a breathable render

• You have a large commercial project inside and out

Where AeroCork™ Works Best

AeroCork™ is particularly effective in:

Cold internal walls with persistent cold spots

Thermal bridging around windows and structural details

Retrofit upgrades where traditional insulation is not suitable due to demolition and space

Bedrooms, living rooms, nurseries and problem areas 

It is also widely used in:

• Housing upgrades

• Commercial buildings

• Public sector projects

Who is AeroCork™ For?

TIWI Approved Installers

Trade Professionals

Plasterers and renderers

Builders and insulation installers

Contractors working on retrofit and remedial projects

Commercial and Public Sector

Housing providers

Facilities management teams

Specifiers and architects

Homeowners

Landlords

Properties with cold rooms or cold walls

Homes experiencing condensation or mould

Anyone looking for insulation without major disruption

Installation & Peace of Mind

AeroCork™ is a specialist product, and like anything performance-led, the result depends on how it’s applied.

That is why TIWI CorkSpray has built a nationwide network of certified installers, each professionally trained to apply this product to the exact standard it demands.

Every TIWI Approved Installer is accredited and supported.

If you're a tradesperson, your welcome to join the network and become a TIWI Approved Installer. (https://www.tiwicorkspray.co.uk/certified-application)

When your project is completed by an accredited TIWI installer, you benefit from:

A fully qualified application

The correct system build-up for your property

Consistent and seamless application

Installer warranty backed install for complete peace of mind

In some cases, the product may be supplied outside of the network. However, installations completed outside of the accredited network will not carry the same warranty or performance assurance.

For most customers, the priority is simple:

Get it done properly, first time, with confidence.

That’s exactly what the TIWI Installer Network is built for.

If you would like to connect with a local TIWI Approved Installer please use the form below: (https://www.tiwicorkspray.co.uk/contact)

Environmental Credentials

AeroCork™ supports sustainable construction and retrofit installation, developed in partnership with a manufacturer VIPEQ with over 25 years of experience and the only ICC certified spray cork insulation product in the world.

• Made from natural, renewable cork

• Carbon-negative material

• High performance Aerogel

• Manufactured under ENAC & ISO 14001 environmental standards

A strong choice for projects where environmental performance matters alongside thermal efficiency.

Is AeroCork™ Right for Your Project?

If you are trying to solve:

• Cold walls

• Heat loss

• Condensation

• Mould issues

AeroCork™ offers a practical, high-performance solution without the disruption of traditional insulation methods.

The key is understanding the building, the problem, and applying the right approach.

What Happens Next

If you’re reading this, there’s a reason.

You’ve got a property that’s:

• Losing heat

• Has black spot mould

• Or simply not performing the way it should

• And you’re looking for a solution that actually works.

That’s where we come in.

For Homeowners

If you’ve got cold walls, condensation, or mould starting to appear, don’t leave it to get worse.

Send us a quick video or photos of the space and tell us what’s happening.

We’ll assess it and point you in the right direction, no guesswork, no generic advice. (https://www.tiwicorkspray.co.uk/contact)

For Trade & Installers

If you’re working on a project and need a solution, not just a finish, let’s have a proper conversation.

We’ll help you get the specification right, support the build-up, and make sure the end result performs as it should through our approved programme.

For Commercial Projects

If you’ve got a live project, drawings, or a problem building that needs solving properly, send it over.

We’ll review it and give you a clear, recommendation based on what the building actually needs.

Why This Matters

Most insulation conversations focus on products.

The real focus should be:

Performance, comfort, and long-term results. Cork doesn't deteriorate over time like fibre glass for example or other man made materials, its also breathable unlike PIR and foil insulation backed plasterboard

AeroCork™ isn’t about ticking a box.

It’s about:

Warmer properties

Reduced condensation

Healthier living environments

Let’s Get It Right, First Time.

Every property is different.

Every wall behaves differently.

And the difference between a good result and a poor one comes down to:

Understanding the problem before applying the solution.

If you want it done properly, start with a conversation.

Message us now and let’s look at your project properly, with a nationwide network of installers we will have someone that can be out to you're in no time or can provide you an estimate remotely. 

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