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Termointonaco 2020 MGN

High Performance Insulating Lime Plaster
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Termointonaco 2020 MGN - Description

The TERMOINTONACO 2020 MGN is a nanotechnological thermo-insulating plaster based on a natural air-lime binder and lightened amorphous micro silica with high thermo-insulating and reflectance characteristics (the ability to reflect the heat back into the living area instead of letting it escape), with excellent thermal mass, acoustic soundproofing and fire resistance.

Being a flexible thermal plaster that can easily be applied on the whole wall surface with no gaps, it results in uniform thermal insulation with no cold-bridging, translating to energy savings and a high level of thermal comfort. Its excellent porosity results in high breathability or vapor permeability, which along with the lime’s natural anti-bacterial properties prevents the appearance of mould and condensation problems. Thanks to its very low thermal conductivity equal to λ 0.043 W/mK, Termointonaco 2020 MGN offers excellent thermal performance.

The Termointonaco 2020 MGN thermal plaster can be applied on all types of walls, both as internal, external or mixed insulation.

If applied on old walls potentially subject to dampness and/or salts (e.g. from rising damp, sideways water penetration, water ingress, sea salts etc.), for increased performance and longevity it is highly recommended to be applied in conjunction with the Rinzaffo MGN Roman base coat. The Rinzaffo MGN base coat acts as a breathable liquid moisture and salt-barrier, protecting the thermal coat from the destructive effects of moisture and crystallizing salts – which are the main reasons behind the premature breakdown of the plastering. Using the Rinzaffo MGN base coat under the thermal plaster will extend the life expectancy of thermal insulation significantly, by about 10 times, from years to several decades.

The Termointonaco 2020 MGN being a soft, porous plaster, it is best finished by a dedicated highly-breathable protective-decorative lime finish, which offers better mechanical protection than ordinary lime putty finishes.

The typical application thickness of this plaster is between 20-60 mm, however up to 160 mm can be applied in 20 mm coats, if needed. To save space, this plaster can be combined and used in conjunction with the Termorasante Aerogel MGN aerogel-lime super-insulating thermal plaster. 

Key Features

Here are some key features of this product.
Breathable
Being a lime plaster, it's naturally vapour permeable or breathable.
Very Good Insulator
This lime plaster has extremely good insulating properties, while being breathable.
Heat Reflectant
Thanks to its excellent heat reflectance, it creates a high thermal comfort in the room.
No Cement. No Chemicals
This plaster does not contain chemicals or cement - it only contains natural materials.
Suitable for Listed buildings
This plaster is suitable for historic or listed buildings and heritage renovations.  

Composition

  • Natural air lime: highest purity lime containing min 90% CaO, classified as CL90S according to EN-459-1 standard
  • Natural hydraulic lime NHL 3.5, certified according to EN-459-1 standard
  • Lightweight micro silica: lightweight amorphous (non-crystalline) micro silica
  • Natural plasticisers: of food / plant origin to improve workability

Specifications

Granulation (mm)
0-5
Vapour diffusion resistance (μ)
7
Declared thermal conductivity - λ (D)
0.043
Specific heat capacity (J/g.K) or
Thermal mass
2.27
pH
10.5
Adhesion (N / mm²)
0.1
Bulk density (kg / m³)
356
Bag weight (kg)
10
Water intake (litre / bag)
7.5
Consumption (kg / m² / cm)
4.5
Application temperature (°C)
5-30
Fire rating
A1
Chloride content (%)
None
Harmful substances
None
Colour
White
Recommended thickness (mm)
20-60 (up to 160)

Certifications

  • CE Marking: this product complies with all relevant European Union regulations, meeting all performance requirements required by the CE marking.

Awards & Nominations

This product has won or been nominated for the following industry awards:

Completed Projects

Here are some of our projects using this plaster:

Solutions

This material can be used in the following applications or solutions:

Photo Galleries

Here are some photos demonstrating this solution. Click on any image to open the photo gallery.

Showing items: 1 - 3 of 3 total.
Full Refurbishment and Insulation of a Listed Building

Here is a 200 year-old listed building in a valley, with very high water table and thick stone walls. It has been fully refurbished and thermally insulated with the MGN breathable lime insulation system. 

Victorian House - Full Replastering after only 6 months. What went wrong?

This 150 year-old Victorian house has been replastered with modern building materials (cement and gypsum plasters). 3 months after the replastering the paint started to go. Another 3 months later the walls had to be fully replastered due to salt related damages.  

Timber-frame Farmhouse - Full Refurbishment & Thermal Insulation

1600s timber-frame listed farmhouse undergoing full refurbishment from top to bottom addressing sympathetically many problems including: new roof, lime pointing, timber infill panels, thermal insulation, replastering, structural reinforcement with lime and lime floors – just to name the most important aspects of the project. 

Videos

Here are some videos related to this solution. Please unmute the videos when playing them.

Showing videos: 1 - 2 of 2 total.

Similar Products

Here are some other similar products of the same category (e.g. other main coats or finishes). Depending on your application, you could use these as alternative products. 

Product Combinations

Although all MGN plasters can be used on their own, in many applications they perform best when certain materials are applied together as a plastering system complementing and reinforcing each other.

Here are some other plasters which are recommended to be used with this one.

Any Questions? Need Technical Advice?

If you have any questions about a project, a problem, a solution, or any of our plasters - please get in touch.

We understand that each project is unique. Using the contact form below feel free to ask us any question. Give us as much detail as you can about your project so we can get back to you with more relevant answers. 

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Application

Here are some key technical points about how to apply this material correctly:

  • Clean the masonry: the plaster must be applied on a cleaned and uniformly wet substrate. All crumbling and loose parts must be removed by brushing so the masonry is free of dust, salts and oils. If possible, also wash the walls with a pressure washer; this will clean and wet the walls in one go. Close larger holes with lime mortar and pieces of bricks.
  • Mixing: mix the material with clean tap water only without adding anything else (no other material or additive), until a homogenous, creamy-consistency mix is obtained. 
  • Application: apply the thermal plaster in (up to) 20 mm coats in one pass, without compressing the material. Wait for the previous coat to harden (2-3 days depending on ambient conditions) before applying the next coat. The last layer must be levelled to make the application of the finishing easier.
  • Drying time: as porous thermal plasters take up significantly more water than denser “regular” plasters, they have proportionally longer drying times. Thus, before applying the finish, it is advisable to let the thermal insulation dry for 15-20 days.
  • Finishing: for better mechanical protection thermal plasters should be finished with a dedicated finish (e.g. Megastuk MGN) – these are mechanically more resilient, longer lasting than ordinary lime putty finishes.
  • Painting: as this is a breathable lime plaster, wall surfaces should be painted with a breathable mineral paint. Wallpapers and modern emulsion petrol-based paints, with no or limited breathability, should be avoided.
  • Application conditions: ambient and wall temperatures must be between +5 to +30°C during application. Surfaces should be protected from rain and humidity until they have completely dried (approx. 3 – 10 days depending on weather conditions).

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