ISO-THERM ULTRA-THIN THERMAL INSULATION

ISO-THERM Internal Wall Insulation

Improve cold internal walls with ISO-THERM ultra-thin thermal insulation. Just 4mm thick, flexible, breathable and designed to receive a compatible plaster skim finish.

Help reduce condensation risk and create warmer internal wall surfaces without the bulk of conventional insulation board systems.

Choose our featured 7.125m² ISO-THERM insulation kit or purchase the standalone 0.95m x 7.5m insulation roll.

BUY ISO-THERM KIT – £329.99 → HOW DOES ISO-THERM WORK?

Only 4mm Thick Breathable Plaster-Skim Ready 7.125m² Roll Coverage

FEATURED INSULATION KIT ISO-THERM 7.125 square metre thin internal wall insulation kit

ISO-THERM Thin Internal Wall Insulation Kit £329.99 7.125m² kit listing – check full contents on product page BUY THE ISO-THERM KIT →

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Ultra-Thin 4mm Minimal reduction in room dimensions

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Thermal Improvement Designed to improve cold wall surfaces

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Condensation Control Helps reduce conditions favouring mould

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Direct Skim Finish Compatible plaster finish can be applied

Shop the ISO-THERM Kit Featured 7.125m² product Buy Insulation Roll Only 0.95m x 7.5m membrane Coverage & Installation Calculate your wall area

FEATURED ISO-THERM PRODUCT

Buy the ISO-THERM 7.125m² Insulation Kit

Our featured ISO-THERM product for customers planning a cold-wall, condensation or thermal improvement project.

FEATURED £329.99 KIT ISO-THERM thin internal wall insulation kit 7.125m²

ULTRA-THIN INTERNAL INSULATION

ISO-THERM Thin Internal Wall Insulation Kit – 7.125m²

The ISO-THERM Internal Wall Insulation Kit is designed for thermal improvement of suitable cold internal wall surfaces.

Using ultra-thin, specially manufactured polyester-based insulation, ISO-THERM offers a flexible alternative to traditional bulky internal insulation boards.

At just 4mm material thickness, it can help improve wall surface temperatures and reduce condensation risk while preserving room space.

7.125m² nominal insulation area
4mm insulation material
Flexible and lightweight
Vapour-permeable construction
Water-resistant material
Designed for a plaster skim
Suitable for prepared internal walls
Purpose-designed thermal wall system

£329.99

ISO-THERM 7.125m² kit – confirm exact supplied components on product page.

BUY ISO-THERM INSULATION KIT →

ALTERNATIVE ISO-THERM PRODUCT

ISO-THERM Insulation Roll Only

Already have the correct installation materials? Choose the standalone ISO-THERM insulation roll.

ISO-THERM thin internal insulation roll 0.95m x 7.5m

INSULATION MEMBRANE ONLY

ISO-THERM Thin Internal Wall Insulation Roll – 0.95m x 7.5m

Standalone ISO-THERM thermal insulation material supplied in a 0.95m wide by 7.5m long roll.

The roll provides 7.125m² of nominal insulation material before cutting, trimming and wastage.

Suitable for customers who require the insulation membrane separately and have arranged the appropriate adhesive and finishing system.

£233.99

Standalone insulation roll – adhesive and finishing materials should be checked separately.

BUY ISO-THERM ROLL →

ULTRA-THIN INSULATION EXPLAINED

What Is ISO-THERM Wall Insulation?

ISO-THERM is an ultra-thin thermal insulation material designed for use on suitable internal walls.

Manufactured using specially structured non-woven polyester fabric with a flame-retardant acrylic coating, the material is flexible, lightweight and approximately 4mm thick.

It is bonded to correctly prepared wall surfaces using the specified ISO-THERM adhesive system.

The installed insulation can then receive a compatible plaster skim, creating a smooth finish ready for decoration.

This approach allows thermal performance to be improved without the substantial thickness associated with many traditional insulation boards.

Why Choose ISO-THERM?

Only 4mm insulation thickness
Flexible and easy to cut
Lightweight polyester construction
Suitable for plaster skim finishing
Can be fitted to sound plastered walls
Helps improve internal wall temperatures
Useful in condensation-prone areas
Designed for minimal disruption
Low overall system thickness

ISO-THERM THERMAL PERFORMANCE

Big Benefits From Ultra-Thin Insulation

ISO-THERM has demonstrated improved thermal performance in a tested wall assembly. Actual results depend on existing wall construction and installation conditions.

4mm Material Thickness Ultra-thin thermal insulation layer

21.6% Tested U-Value Reduction Improvement for the reported wall assembly

10mm Approx. Installed Thickness Including adhesive and plaster skim

Understanding the 21.6% Thermal Improvement

Under the supplied test conditions, the wall U-value reduced from 1.898 W/m²K to 1.488 W/m²K.

This is a reduction in heat transmission through that particular tested wall construction.

It should not be interpreted as a guaranteed 21.6% reduction in household heating bills, or as an identical improvement for every type of wall.

COLD WALLS AND CONDENSATION

ISO-THERM for Cold Walls and Condensation Risk

Cold external-facing walls can be prone to condensation, particularly where indoor humidity is high.

When warm indoor air comes into contact with a sufficiently cold surface, water vapour may condense.

Persistently damp surfaces can encourage surface mould growth and deterioration of decorative finishes.

ISO-THERM helps improve internal wall thermal performance, potentially increasing surface temperatures and reducing condensation risk under suitable conditions.

The material also demonstrated no fungal growth during the stated four-week laboratory test.

This does not guarantee that finished walls will remain mould-free regardless of humidity and ventilation.

Typical Areas to Consider

Cold external-facing bedroom walls
Living room walls
Older solid-wall properties
Window and door reveals
Condensation-prone wall areas
Residential refurbishment projects
Commercial property improvements
Rooms where space is restricted

ISO-THERM INSTALLATION

How Is ISO-THERM Installed?

A straightforward installation process on suitable sound wall substrates, using the correct bonding and finishing materials.

Prepare the Wall

Confirm that the wall is sound, stable and suitable. Remove loose material, investigate damp defects and complete necessary repairs before installation.

Apply the Adhesive

Trowel the specified ISO-THERM adhesive onto the wall, typically to an approximate thickness of 5mm, following the current system instructions.

Fix the Insulation

Position the flexible ISO-THERM material onto the adhesive. Cut around suitable wall features and ensure proper contact and joint treatment according to the installation guide.

Final Stage – Plaster & Decorate

Once bonded and sufficiently cured, the insulation can receive a compatible plaster skim of approximately 2–3mm.

After the plaster has dried, apply suitable decorative finishes.

All preparation, bonding, curing and finishing should follow the manufacturer's current installation guidance.

ISO-THERM ROLL COVERAGE

How Much ISO-THERM Do You Need?

Each listed roll measures 0.95 metres wide by 7.5 metres long.

Rolls / Kit Areas	Nominal Coverage	Suggested Planning Use
1	7.125m²	Small wall area
2	14.25m²	One or more larger walls
3	21.375m²	Several internal walls
4	28.5m²	Larger room renovation
5	35.625m²	Multi-room project

The figures above represent nominal insulation area, before cutting, joints, trimming, openings and wastage. The number of kits or rolls required may vary by layout.

Example – Insulating a 20m² Wall Area

Each roll covers approximately 7.125m².

20 ÷ 7.125 = 2.81

You would therefore need at least 3 rolls or 3 equivalent kit areas to cover 20m² before wastage.

Check the actual wall dimensions and cutting requirements before ordering.

BUY ISO-THERM KIT →

ISO-THERM PRODUCT COMPARISON

ISO-THERM Kit vs Insulation Roll

Compare our two ISO-THERM products before choosing the best format for your project.

Product	Nominal Area	Price	Product Link
ISO-THERM Insulation Kit	7.125m²	£329.99	BUY KIT →
ISO-THERM Insulation Roll	7.125m²	£233.99	BUY ROLL →

The kit is listed as an insulation system package. Confirm the exact included adhesive, accessories and other contents on its individual product page. The roll is listed as the standalone membrane.

ISO-THERM TECHNICAL INFORMATION

ISO-THERM Insulation Specifications

Technical characteristics of the ISO-THERM system based on the supplied product information.

Property	Value / Description
Material	100% polyester non-woven fabric
Coating	Water-based flame-retardant acrylic
Material Thickness	Approx. 4mm
Installed System Thickness	Approx. 10mm
Roll Width	0.95 metre
Roll Length	7.5 metres
Nominal Roll Area	7.125m²
Reported Thermal Improvement	21.6% U-value reduction in tested assembly
Reported U-Values	1.898 to 1.488 W/m²K
Vapour Permeability	Vapour-permeable material
Water Resistance	Waterproof material characteristics
Fungal Resistance	0% growth during specified four-week test at 25°C
Pull-Off Resistance	0.3 MPa
Adhesive	Specified ISO-THERM Adhesive
Typical Adhesive Thickness	Approx. 5mm
Plaster Finish	Compatible skim coat, approx. 2–3mm

These values describe the supplied system technical information. Test results are not a guarantee of identical performance in every building.

BREATHABLE INSULATION

Vapour-Permeable Yet Water-Resistant

ISO-THERM is designed to allow water vapour movement while providing resistance to liquid water passage through the insulation material.

This makes it a useful option for suitable internal thermal improvement projects where moisture behaviour is important.

However, waterproof material characteristics do not make the complete wall assembly an independently certified waterproofing system.

Penetrating damp, leaking plumbing, defective roofing and other sources of unwanted moisture should be repaired before installation.

Existing wall construction and moisture conditions should be assessed to avoid concealed condensation risks.

Before Installing ISO-THERM

Confirm wall condition
Investigate existing damp problems
Check for water ingress
Repair loose or damaged plaster
Use the correct system adhesive
Plan around sockets and reveals
Allow for ventilation and humidity
Choose compatible finishing materials

ISO-THERM HELP & ADVICE

ISO-THERM Wall Insulation FAQs

Common questions about ultra-thin internal insulation, installation, condensation, roll coverage and finishing.

What is ISO-THERM internal wall insulation?

ISO-THERM is a flexible, ultra-thin internal thermal insulation material designed to be bonded to suitable internal wall surfaces and finished with a compatible plaster skim.

How thick is ISO-THERM?

The insulation material is approximately 4mm thick. A completed system including adhesive and plaster skim is approximately 10mm thick.

How much does the ISO-THERM kit cost?

The listed ISO-THERM Thin Internal Wall Insulation Kit covering 7.125m² is £329.99.

How much is the ISO-THERM insulation roll?

The standalone ISO-THERM roll measuring 0.95m x 7.5m is listed at £233.99.

What is the difference between the kit and roll?

The kit is sold as an ISO-THERM system package, while the standalone product is the insulation roll. Check the kit's product page to confirm its exact included components.

How much wall area does one roll cover?

Each roll measures 0.95m x 7.5m, providing 7.125m² nominal insulation coverage before cutting and wastage.

Can ISO-THERM help reduce condensation?

Yes. Improving the thermal performance of cold internal walls can help reduce the likelihood of surface condensation. Actual results depend on wall construction, ventilation and indoor humidity.

Can ISO-THERM prevent black mould?

ISO-THERM can make wall surfaces less susceptible to condensation-related mould conditions. It has also demonstrated fungal resistance in laboratory testing. It does not guarantee mould-free walls in every environment.

Is ISO-THERM breathable?

Yes. The material is vapour permeable while incorporating waterproof material characteristics.

Is ISO-THERM waterproof?

The insulation material has waterproof properties, but the complete installation should not be assumed to replace a specified structural waterproofing system.

Can ISO-THERM be plastered over?

Yes. The system is designed to receive a compatible plaster skim, typically around 2–3mm thick.

Can I install ISO-THERM over existing plaster?

ISO-THERM can be bonded to suitable sound plastered walls after the appropriate preparation and checks.

Do I need to remove skirting boards?

Not always. The ultra-thin material means skirtings and architraves may remain in place in suitable installations. Final detailing depends on site conditions.

What adhesive should I use?

ISO-THERM should be installed using the specified ISO-THERM Adhesive in accordance with current manufacturer instructions.

Can ISO-THERM replace thick insulation boards?

ISO-THERM offers a much thinner thermal improvement option, but it may not provide the same total insulation performance as substantially thicker boards. Check project and building regulation requirements.

Does ISO-THERM cure rising damp?

No. ISO-THERM is a thermal improvement product, not a substitute for proper diagnosis and treatment of rising damp, penetrating damp or active leaks.

Is ISO-THERM suitable for older properties?

It may be suitable for certain older buildings, subject to wall construction, moisture behaviour and compatibility assessment.

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PAM TIES ISO-THERM INSULATION

Ready to Improve Your Cold Walls?

Choose the ISO-THERM 7.125m² Internal Wall Insulation Kit for £329.99 and improve the thermal performance of suitable cold walls with a discreet ultra-thin insulation system.

BUY ISO-THERM KIT – £329.99 →

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ISO-THERM Internal Wall Insulation