Modena M5 MGN

Lime Consolidation, Pointing, Bedding Mortar

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Modena M5 MGN - Description

The MODENA M5 MGN is a consolidating lime mortar that fits perfectly into historical contexts. It is a mass-coloured plaster with exceptional performance.

Modena M5 MGN is a certified structural consolidating mortar/plaster for exterior use, suitable for the consolidation of old masonries. It is a fibre-reinforced, breathable lime plaster of an antique yellow colour that fits perfectly into the historical context.

Structural consolidation: as a certified lime structural consolidation plaster (certified to UNI-EN 998-2), it can be combined with fibre-reinforced polymer (FRP), fibre-reinforced cementitious matrix (FRCM), steel, carbon and other meshes and structural consolidation systems. Being a lime plaster, in addition to its high structural consolidation ability it also guarantees the right elasticity to the masonry.

When the masonry subject to structural consolidation is also affected by rising damp and its accompanying salts, it is important to diagnose the extent of the problem and if needed, first apply a salt-resistant consolidating lime plaster such as the Betoncino Consolidante MGN or the Rinzaffo MGN.

Pointing and bedding: the MODENA M5 MGN can also be used as a pointing and bedding mortar at low and high elevations, being suitable for crack stitching, anchoring and pinning consolidation works.

Key Features

Here are some key features of this product.

Breathable

Being a lime plaster, it's naturally vapour permeable or breathable.

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.

For Structural Consolidation

This plaster is suitable for the structural consolidation of old historic or listed buildings.

Composition

Natural air lime: highest purity lime containing min 90% CaO, classified as CL90S according to EN-459-1 standard

Natural volcanic pozzolans: volcanic sands and ashes of exclusively natural origin, certified according to EN 197-1 standard

Natural hydraulic lime NHL 3.5, certified according to EN-459-1 standard

Marble powder: certified according to EN 12620 standard

Natural river sands: washed river sands, free of salts and impurities, certified according to EN 13139 standard

Technical Data

Granulation (mm)

0-3

Vapour diffusion resistance (μ)

Declared thermal conductivity - λ (D)

0.72

Water absorption

0.9

10.5

Adhesion (N / mm²)

Compressive strength (N / mm²)

Bulk density (kg / m³)

1663

Bag weight (kg)

Water intake (litre / bag)

Consumption (kg / m² / cm)

Application temperature (°C)

5-30

Fire rating

Chloride content (%)

None

Harmful substances

None

Colour

Antique yellow

Recommended thickness (mm)

Certifications

UNI EN 998-1:2016 – Certified Coloured Plaster for External Plastering (CR)

UNI EN 998-2:2016 – TUV Italy Certified Mortar with Guaranteed Performance in Elements Subject to Structural Requirements

Work Specifications & Application

Here are the recommended work specifications for this plaster.

Pointing, Consolidation, Building

[20-40 mm] Structural Consolidation lime plaster, in 20 – 40 mm or more thickness, applied as:

█ [10 – 15 mm] Consolidation plaster, coat 1
▒ [Mesh] Structural reinforcement mesh (20 x 20 mm, 40 x 40 mm): embedded between coats for additional reinforcement and flexibility.
█ [10 – 15 mm] Consolidation plaster, coat 2. Etc.

Application Instructions

Here are some key technical points about how to apply this material correctly. Please have the applicators read / watch the application instructions below before applying the product.

APPLICATION VIDEO:

APPLICATION INSTRUCTIONS:

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.
IMPORTANT: Dry to wet mixing: plasters with hydraulic ingredients should always be mixed from dry to wet (workable) state. Add your powder to a bit of water, start mixing and gradually add more water till the right consistency is reached. This is the right way. Mixing the other way – wet to dry mixing – by starting with lots of water then gradually adding powder to the right consistency, is incorrect. Reason: excessive wetting weakens the plaster, alters its hydraulic set resulting in less performant, more friable and shorter lasting plasters.

Application: apply the plaster in 10 mm coats.

Additional coats can be applied in further 10 mm increments. Use an embedded fibreglass mesh for extra reinforcement over the recommended thickness.

Drying time: the plaster dries quite quickly, typically in 1-2 days, depending on ambient conditions. Once it has hardened, the next coat can be applied.

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.
IMPORTANT: Dry to wet mixing: plasters with hydraulic ingredients should always be mixed from dry to wet (workable) state. Add your powder to a bit of water, start mixing and gradually add more water till the right consistency is reached. This is the right way. Mixing the other way – wet to dry mixing – by starting with lots of water then gradually adding powder to the right consistency, is incorrect. Reason: excessive wetting weakens the plaster, alters its hydraulic set resulting in less performant, more friable and shorter lasting plasters.

Application: apply the plaster in 10 mm coats.

Additional coats can be applied in further 10 mm increments. Use an embedded fibreglass mesh for extra reinforcement over the recommended thickness.

Drying time: the plaster dries quite quickly, typically in 1-2 days, depending on ambient conditions. Once it has hardened, the next coat can be applied.

Downloads

Here are some key technical documents (spec sheets, application guide etc.) about this plaster.

Certification (2)

Solutions

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

Lime Structural Consolidation

Roman Lime as Structural Consolidation Material

Photo Galleries

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

MGN Certified Lime Structural Consolidation System

The MGN Structural Consolidation System is designed to strengthen masonry and vaulted structures using lime-based structural mortars, reinforced with glass fibre mesh and connectors. It combines traditional lime mixes with modern reinforcement to create a continuous structural layer across the surface of the wall.

Unlike concrete-based systems, which are dense, rigid and often too strong for historic masonry, this system is built around materials that are very similar to the original fabric. Lime mortars are more flexible, more accommodating of movement, and able to absorb and redistribute stresses rather than forcing them into the masonry.

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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.