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External Wall Insulation (EWI)

External Wall Insulation & Insulated Render Systems

There are millions of solid wall and non-traditional properties, in the UK which suffer from poor thermal performance.

Typical heat loss through un-insulated walls is 35%The most significant heat loss from these properties is through the external walls. This is estimated to be around 35% of the total heat loss, resulting in high fuel consumption and therefore high CO2 emissions. The Government’s target is to make an 80% reduction in these emissions by 2050. External Wall Insulation systems will play an important role in achieving this.

External Wall Insulation involves externally cladding a building with insulation boards, before applying a layer of basecoat render and then a final decorative finish. The overall result is not only a highly insulated, energy efficient home but one that is visually transformed on the outside.

Structherm’s comprehensive range of External Wall Insulation and Insulated Render (IR) systems are fully BBA approved. They provide a high degree of thermal efficiency, vapour permeability, impact resistance and large choice of textured finishes and colours.

     




Click the image below to read case study
Boots non-traditional precast concrete properties before and after refurbishment using Structherm Structural External Wall Insulation

Benefits of External Wall Insulation

  • Significantly improved thermal performance
  • Reduced fuel consumption and therefore less CO2 emissions
  • Impact resistance of 6N/m
  • The systems are classified as class 0
    or ‘low risk’ as described in the national Building Regulations. They have also attained BS 8414 part 1 (fire performance of external cladding systems)
  • Improved acoustic performance – transmission of external airbourne noise through the external wall is much reduced
  • No risk of condensation as dew point occurs on the outside of the system
  • Due to external application, residents are able to stay in their homes with minimal disruption to their lives.
  • Prolongs building life.
  • Low maintenance.
  • Wide range of finishes and colours.
 

 










                   Get in touch, call us on Freephone
 

                  0800 040 7460

                  Download brochures and literature.


System Characteristics & Options 

Structherm - typical build up of EWI layers. Click to enlarge.Structherm’s External Wall Insulation Systems are made up of several layers, which provide the thermal performance and aesthetic qualities required when refurbishing a building. For the first layer, choose from our range of high performance insulation panels (Expanded Polystyrene (EPS), Enhanced EPS, PIR, Mineral Fibre or Phenolic) to meet your thermal requirements. The middle layers are then a combination of basecoats and mesh which
give the system strength and impact resistance. To complete the system, you can choose any finish from our Contemporary or Traditional ranges. Opposite is a photograph showing the typical build up of the Structherm "Thin Coat" system with an Acrylic finish.


Renders & Finishes

Structherm's quality renders and finishes are suitable for contemporary new build or refurbishmnet projects. Many of the renders and finishes are also an integral feature of our External Wall Insulation (EWI) systems, and are also available as a render only option for new build applications. Continuous research and development programmes ensure that the performance of each product consistently meets the most demanding conditions likely to be encountered with a particular project.

Renders

A render is a basecoat upon which a variety of other finishes or finishing coats may be applied. There are five types of rendered basecoat available:

1. Standard
2. Fibre reinforced
3. Polymer modified
4. Lightweight
5. Bonding


All basecoats are manufactured from natural limestone and are supplied dry in 25 kg bags. 

Finishes

Structherm’s finishes are grouped into Contemporary and Traditional ranges.

Contemporary (Acrylic)

Smooth and textured Acrylic finishes offer excellent durability, water vapour permeability and water repellence. They also offer superb protection against UV and are crack resistant.

The table below shows our range of ClassicPro finishes along with how they are applied. Each finish is available in any of our 280 standard colours.
ClassicPro
Acrylic Paint
ClassicPro Structherm AP-C Apply using a paint brush or roller Acrylic quartz based
micro-coating paint
ClassicPro
Acrylic 1.5mm
Structherm AL-C Apply using a trowel Acrylic marble based
1.5mm grain render

Contemporary (Silicone)

Smooth and textured Silicone finishes offer outstanding repellence towards water and dirt, and retain their colour and cleanliness for longer than acrylic finishes.

The table below shows our range of ClassicPro finishes which provide excellent adhesion onto every kind of mineral substrate. The range is also particularly resistant to mould and fungi attack due to the inorganic pigments contained within the product. Each finish is available in any of our 280 standard colours.
ClassicPro
Silicone Paint
ClassicPro Structherm AP-C Apply using a paint brush or roller Silicone based smooth
paint
ClassicPro
Silicone 1.5mm
Structherm AL-C Apply using a trowel Silicone based
1.5mm grain render

Traditional (Brick Effect Render)

Structherm’s range of Brick Effect finishes are highly versatile two coat specialist render systems, providing the effect of real brickwork by using differently coloured, render mortar and face layers. Choose from 44 standard colours for use as the mortar or face layer. The system can be used for full area coverage or for brick features such as string courses, quoins or soldier courses.
Macerend Macerend brick effect render Apply using a trowel Light Grey mortar layer and
Oulton Brown face layer

Traditional (ArtBrick)

ArtBrick is a multistock brick effect render installed in the same way as Macerend, but with the addition of a dye applied to the face layer to achieve the multistock brick effect (choose from 4 standard multistock dyes). Choose from 44 standard colours for use as the mortar or face layer. The system can be used for full area coverage or for brick features such as string courses, quoins or soldier courses.
ArtBrick Apply using a trowel Keighley Grey mortar layer and Whitby Stone face layer

Traditional (Stone & Ashlar Effect Render)

Structherm’s range of Stone & Ashlar Effect finishes are highly versatile two coat specialist render systems, providing the effect of real stone and ashlar stone by using differently coloured, render mortar and face layers.

Stone Effect Renders

The table below shows the two types of Stone Effect Render finishes. The colour of the render used is normally of traditional buff or stone colour, however we have 44 standard colours to choose from that can be used for the mortar or face layer and in any combination desired. Depending on the final aesthetic result required the face layer can be either smooth or traditional rustic style.
Stone Effect Stone Effect render applied using trowel Apply using a trowel Keighley Grey mortar layer and Whitby Stone face layer
Random Stone Effect Random Stone Effect render applied using trowel Apply using a trowel Keighley Grey mortar layer and Old Yorkshire Stone face layer
Ashlar Stone Effect Ashlar Stone Effect render applied using a trowel Apply using a trowel Keighley Grey


Traditional (Dash Receiver & Aggregate)

Structherm’s range of Dash Receiver and Aggregate provides a decorative, durable and cost effective finish applied in two stages. The final aesthetic appearance depends on the combination of coloured dash receiver and aggregate chosen.

Dash Receiver

Dash receiver is a specially formulated polymer modified through colour render that provides excellent adhesion and impact resistance. Click here to view our standard colour range. The dash receivers should be hand applied onto an appropriate basecoat using a hawk and trowel to a thickness of 6-8 mm.

Dash Aggregates (Iron Free)

Our high quality decorative dash aggregates allow you to not only create classic rendered pebble dashed walls, but also some very unique styles with our wide range of colours available. Click here to view our standard colour range. The dash aggregate is thrown onto the surface of the dash receiver, whilst still wet, in an upward motion using a hand scoop. For best results an even distribution of aggregate is necessary and any missed areas should be rectified immediately as it can not be touched up next day.

Applications


Sectors

Quality Assurance

Our External Wall Insulation systems carry a full warranty. They are BBA approved with a minimum 30 year design life, and are fully patented.

Every project has an individual quality assurance procedure, supported by:

  • BS EN ISO 9001:2008
  • Professional indemnity insurance
  • Product guarantee insurance
  • A close working partnership with Approved Installation Contractors
 

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