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iQ-Therm 2.0 | Breathable Insulation

Updated: Nov 17, 2023

Energy Refurbishment with Remmers

Save energy costs.

Reduce costs.

Live sustainably.

iQ-Therm 2.0 is an update to the capillary-active interior insulation iQ-Therm that was first launched in 2009. It is highly thermally insulating, resilient during processing and operation, leads to a significantly improved quality of living and is also guaranteed mould-resistant.


Flexible strip technology

Quick and simple to use

Easy sizing and mounting

Can be mounted wall-by-wall, or on individual walls

Very good heat insulation

Very low condensation and good drying performance

User-friendly and reliable system

Noticeably improves the indoor climate

Automatically meets the minimum requirements for hygienic thermal protection

Zero mould guaranteed

Virtually free choice of surface design with diffusion-open wall coating systems

Saves energy costs and protects the environment

Save energy and CO2.

Reduce costs and live sustainably.

Energy is becoming increasingly expensive, and it's crucial to be mindful of our energy consumption. The European Green Deal emphasizes energy-efficient construction and renovation as a key aspect of climate protection. Improving thermal insulation in old buildings can significantly reduce heating energy and costs. Interior insulation is a viable solution when exterior insulation is not possible or only specific areas need to be heated. iQ-Therm, a capillary-active interior insulation system, offers a robust and easy-to-install option without requiring a vapor barrier. It combines specialized materials, including a high-performance thermal insulation material and absorbent mineral mortar, to create a composite material with high insulation and capillary activity. Moisture is efficiently channelled out of the wall, preventing damage. iQ-Therm 2.0, an optimized version, offers even simpler and more reliable usage with strip-shaped capillary-active areas.

iQ-Therm 2.0 product data:

Dry density

> 30 kg/m³

Thermal conductivity λ (EU nominal values)

iQ-Therm 2.0 30: 0.028 W/(m·K) iQ-Therm 2.0 50: 0.028 W/(m·K) iQ-Therm 2.0 80: 0.026 W/(m·K) iQ-Therm 2.0 120: 0.025 W/(m·K)

​Thermal conductivity λ once installed (design value):

approx. 0.003 W/(m·K) higher in each case

Water vapour diffusion resistance value μ

40 - 200

iQ-Therm 2.0

The new strip technology

iQ-Therm 2.0 is an update to the capillary-active interior insulation iQ-Therm that was first launched in 2009. In the iQ-Therm system, a high-performance insulating material is combined in the cross-section with a mineral mortar, which makes it possible to achieve a capillary absorbency in the system that eliminates the need for a vapour barrier.

In the previous iQ-Therm system, capillarity was achieved by perforating the panels at regular intervals and filling the holes with a special mortar.

In the iQ-Therm 2.0 system, this concept has evolved, with the point-shaped capillary-active areas being transformed into strips.

The revamped system now also offers the option of using insulation thicknesses of more than 80 mm; iQ-Therm 2.0 is currently available in thicknesses of 30, 50, 80 and 120 mm. Only a few simple tools are needed for application: a knife for cutting, a slurry brush or scraper for applying the adhesive mortar iQ M Universal, and a notched trowel for applying the plaster iQ Top.

Simple mode of action combines heat insulation, capillarity and humidity regulation

There are different types of moisture transport in and through building components. To prevent damage, these must be intelligently managed – especially in the case of interior insulation.

The iQ-Therm 2.0 insulation strips are bonded to the wall and in the horizontal joints on site using a special, highly capillary-active adhesive mortar. The result is a composite material with a high insulating effect and simultaneous capillary activity, without the need for a vapour barrier.

If condensation forms in the system because the temperature falls below the dew point in winter, or if driving rain penetrates through the facade, with iQ-Therm the moisture is not trapped behind a film, but is instead channelled out of the wall cross-section via the mortar in the horizontal joints and back into the room air without causing damage.

Finally, the interior insulation is either filled or plastered over with a porous, mineral lightweight mortar, a so-called “climate control mortar”. This final layer acts as a sorption layer for the surface distribution of moisture, levels out the surface temperatures and serves as the installation layer for any subsequent surface finishing.

iQ-Therm 2.0 - 30/50/80/120

Capillary-active PUR rigid foam interior insulation system for creating highly insulating, diffusible interior insulation with capillary moisture transport


Product /

Product details

Application rate


Adhesive bonding

iQ M Universal

approx. 1.3 kg/m²/mm



iQ-Therm 2.0

30 / 50 / 80 / 120

approx. 0.85 strips/rm

approx. 6.8 strips/m²


Thin-coat plaster

iQ M Universal

approx. 1.3 kg/m²/mm

+ reinforcement

iQ Tex

approx. 1.1 m²/m²


Climate-regulating plaster Q2

iQ Top

approx. 0.6 kg/m²/mm

+ reinforcement

iQ Tex

approx. 1.1 m²/m²


Optional: Fine filler Q4

iQ Fill Q4

approx. 1.1 kg/m²/mm


Colour finish

Color SL / Color Si

approx. 0.15 l/m²

per coat

Alternative: Colour finish

​Clay Paint

approx. 0.1 l/m²

per coat


  • Energy modernisation

  • Mould remediation and prevention in existing buildings

  • Establishment of the minimum hygienic thermal protection standard for existing building substance

  • I mprovement of the indoor climate thanks to increased wall surface temperature


  • Strip-shaped

  • Excellent thermal insulation

  • Open to vapour diffusion

  • Capillary-active

  • λ (EU nominal values):

  • iQ-Therm 2.0 30: 0.028 W/(m·K)

  • iQ-Therm 2.0 50: 0.028 W/(m·K)

  • iQ-Therm 2.0 80: 0.026 W/(m·K)

  • iQ-Therm 2.0 120: 0.025 W/(m·K)

  • λ once installed: approx. 0.003 W/(m·K) higher in each case

  • Building material class (DIN 4102-1) B2

  • Reaction to fire (EN 13501-1) E

  • Low construction height, choice of 30, 50, 80 & 120 mm

  • Easy to apply

  • Thermal insulation material according to DIN 4108-10

Applying the strip technology


Remove old wall coverings, e.g. wallpaper. The substrate must be clean, dry, absorbent and stable.


A so-called partition wall strip is laid on the floor and, if necessary, along the acoustical and mechanical decoupling as well as gap-free connection. In the connection to the ceiling, Kompriband 15/5-10, a pre-compressed tape sewn into PP foil for terminable decompression, must be used.


The first capillary-active mortar bed joint is installed at the base of the partition strip using iQ M universal. Apply the material in a slurry with a brush or trowel to a thickness of approx. 1 mm. On the wall, iQ M universal is applied vertically over the entire surface with a suitable notched trowel to create an adhesive bed with a layer thickness of approx. 3 mm. The entire adhesive bed must be free of cavities.


Now, embed the first row of iQ-Therm 2.0 insulating strips in the mortar bed. Do not bond the joints of the insulating strips. The base layer of the iQ-Therm 2.0 strips should be laid out as horizontally as possible.


The installation of iQ-Therm 2.0 is now continued layer by layer, whereby the bearing joints are made with iQ M universal set to slurry in 1 mm thickness. Cross joints between the strips must be avoided.


Once the wall surface is complete, apply the climateregulating plaster iQ Top or the thin-coat plaster and adhesive mortar iQ M universal in two layers with an embedded reinforcement fabric. This is needed in order to avoid cracks and to prevent the joint areas from becoming visible on the wall surface over time. Both products are humidity-regulating and noticeably improve the room climate.

Cut heating costs

and live more


The price of fossil fuels such as petroleum, natural gas and coal is rising relentlessly. In addition to the increasing scarcity of fossil fuels, the advancing climate change caused by greenhouse gases is beginning to be felt. This is especially the case for old buildings, which consume approximately three times as much energy as new buildings. This is primarily due to the fact that half of all existing buildings are still inadequately protected against energy loss, if at all.

Individual solutions

for every situation

Sustainable, affordable solutions that enable us to save energy and reduce energy demands must be developed and implemented. This involves finding answers to some of the most important questions:

  • Where are the weaknesses in the building?

  • Which concepts and systems are the most suitable for which building types?

  • How and how quickly does an energy efficiency renovation pay for itself?

  • Are there any financial incentives or grants that can be applied for?

  • What regulations and requirements have to be observed?

Although we don’t know the answers to all of these questions, we do know some of them.

Green renovations with a purpose

A dry and intelligently insulated building is the foundation for a comfortable and environmentally friendly home that offers a healthy living environment. Well-insulated walls and windows have pleasantly warm surfaces and guarantee a high level of living comfort. The perceived comfort results from the interaction between the different temperatures of the walls, windows and air. If the walls are warm and well insulated, much less heating is needed.

At the same time, the heating phases necessary for maintaining the temperature of a room are significantly shortened. The wall former of internally insulated building components is not heated up as well, and the room can be used at a comfortable temperature for a short time. This once again significantly optimises the energy utilisation.

By increasing the wall surface temperature by just 1 °C, the room temperature can be reduced by 2 °C while maintaining the same perceived comfort level. This amounts to an average saving of approx. 6% on energy costs.

The iQ-Lator

Verification and evaluation of multi-layer wall structures

Internal insulation has a particular influence on the physical behaviour of an existing construction. Particular attention must be paid to water vapour diffusion from the inside to the outside with possible condensation on the former inner surface of the building component and the limited drying potential of the outer wall after exposure to driving rain.

Hygrothermal simulation calculations with coupled heat-moisture transport are recommended in order to install interior insulation safely from a building physics point of view. Refer to WTA Code of Practice 6-4 for more information.

These hygrothermal calculations can be created in clear, simple and realistic format with iQ-Lator. With the help of the results, problematic wall structures can be identified and it can be estimated whether and how installing interior insulation will improve a construction in terms of building physics.


- Proof of moisture protection according to DIN 4108-3

- Minimum thermal insulation according to DIN 4108-2

- Standard-compliant verification of modern interior wall systems

- Design optimisation

- Assessment of mould growth criteria

- Testable calculation and verification protocol

Moisture protection is thermal protection

Driving rain protection for facades

The long-term success of a green renovation often depends on the interplay of several individual measures. In addition to improving the energy standard, it is often also necessary

to provide protection against driving rain for the existing structure. Damp building materials are at risk of frost damage and biological attack by algae, lichens and mosses. But that’s not all – the thermal insulation capacity is significantly worse when building materials are damp instead of dry. This is mainly due to the fact that water has a much higher thermal

conductivity than air, meaning that water-filled pores can transfer greater amounts of heat than air-filled ones. As the moisture content increases, the thermal conductivity of a

building material increases significantly too. Therefore, one of the key requirements for energetic refurbishment is reducing the moisture content in the building materials. The impact of driving rain, i.e. rain driven by the wind, is the most common and obvious cause of moisture ingress in facades.

Stone-faced facades, or those that are to be left without a paint finish, require driving rain protection that is effective

but invisible. In this case, hydrophobic impregnation products such as Funcosil FC and Funcosil SNL in liquid form are

used. These materials minimise capillary water uptake while preserving the diffusion capabilities of the masonry.

Waterproofing and insulation combined: renovating cellars and basements

Interior waterproofing is used where the basement brickwork is difficult or impossible to access from the outside. The brickwork is left in the damp area and sealed off from the

higher areas with a horizontal barrier. The interior wall surfaces are protected against moisture penetration with special waterproofing slurries. Since the brickwork remains in a damp state, it can only make a small contribution to heat insulation. In order to nevertheless enable high-quality use, interior insulation is used in such cases. The high-performance interior insulation iQ-Therm is ideally suited to this situation.

EU Green Deal

Making existing buildings fit for the future

All 27 EU member states have committed to making Europe the first climate-neutral continent by 2050. To this end, the ambitious target of a 55% reduction in carbon emissions by 2030 was agreed. Almost 40 percent of our total energy consumption is due to our buildings – most of which are uninsulated old buildings. To achieve an annual renovation rate of 3% (a tripling of the current level), 35 million inefficient buildings would have to be renovated – that's 87,500 buildings per week! Intelligent renovation systems such as high-performance interior insulation systems, facade impregnation or plinth waterproofing can drastically reduce the energy consumption of existing buildings – and do so in a resource-saving and sustainable manner. The EU Green Deal guidelines aim, among other things, to remove existing hurdles throughout the renovation chain, simplify rules and create financial incentives for renovation measures. This is essential if we are to pave the way to a climate-neutral future.

iQ-Therm 2.0 + system products

iQ M universal:

Fixing adhesive and thin plaster

iQ-Therm 2.0 - 30 / 50 / 80 / 120:

Capillary-active rigid PUR foam board

iQ Top:

Climate-regulating plaster

iQ Tex:

Reinforcement fabric made of E-glass with polymer sheathing

iQ Fill Q4 (SL Fill Q4):

Fine filler plaster for smooth finish

Color Si (Color SL):

Washproof, solvent-free and plasticiser-free silicate interior wall paint in the iQ-Therm 2.0 system

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