Ecomerchant Protect System - External Wall Wood Fibre Board & Lime Render (EWI)

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Quick Overview

The Ecomerchant Protect system is suitable for use in masonry, timber frame and cross laminated timber construction, for either new build or renovation projects. Ecomerchant have partnered with Lime Green and Steico to produce a complete and comprehensive external render system. This system offers insulation boards, fixings, beads & mouldings and a lime based render. In developing this system our priority has been the production of a water vapour open, low impact system.

Please see products required on this link, or under the Insulation/EWI heading, (you will also need beading and baserails and ancillaries that can be added when you call to price/order).

Ecomerchant Protect is an independently assessed complete insulation and render system for new build and renovation. For design and quotation please call us. 

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Ecomerchant Protect System

Protect is an External wall insulation system using insulating wall board made from natural wood fibre and a lime-based render. Once in place, it provides an effective and simple way to increase insulation values for a wide range of properties - keeping walls warm, dry and weather-proofed. Solid walled buildings benefit from using our wood fibre boards these are vapour open just like our render, this helps to create a more comfortable and healthier living space within the property itself.

The Protect system can be incorporated into the design of new-builds to create a super-insulated building structure. Or it can be retro-fitted during building renovation and building refurbishment to the exterior of older properties that don't meet modern energy efficiency standards.

With Protect external wall insulation, the walls remain weatherproof and weather resistant but can still ‘breathe', as trapped moisture is able to escape.

Special additives in the lime-based render mix reduce the risk of cracking and algae growth, producing a durable, stable finish and vastly reducing the need for building maintenance and repair.

To make sure you get the most from your Protect external wall insulation system, Ecomerchant offers an in-depth technical support service that covers all aspects of your build, from pre-planning right through to completion.

Prior to the start of building, Ecomerchant will evaluate your project to make sure that all design and build requirements are in place for the Protect system.

For product comparison, and any necessary sign-off by local authorities, samples of all relevant materials can be provided, together with sample drawings for architects, planners and building control, tradespeople and other construction professionals. Ecomerchant also supplies thermal calculations and a condensation risk analysis to ensure compliance with all relevant regulations, together with costings for the project.

The Ecomerchant Protect system consists of a breathable lime render applied to a water vapour open woodfibre board providing a wall finish with high insulation properties, moisture control of the structure and a minimal build up.


The Ecomerchant Protect System is designed to be as warm and breathable as possible and is ideal in the thermal upgrade of solid wall masonry walls, historic timber frames and new construction too.

  • Highly breathable Boards and render 
  • Good airtightness
  • Good impact and weather resistance 
  • Lime based mineral render system 
  • Low thermal bridging
  • Sound protection 
  • Heat storage in hot and cold weather
  • Good fire protection 
  • Thermal insulation for solid walls and timber frames

Areas of Application

Wood fibre insulation board for use in External Thermal Insulation Composite Systems (ETICS) Protect is suitable for new build and renovation in both timber frame (including cross laminated panels CLT) and solid masonry wall construction.

Ecomerchant Protect System – Material Components

The Ecomerchant Protect System designed by Lime Green has been tested against and meets ETAG004 external wall insulation and  is certified with a CE mark. 

It is therefore vitally important that the correct components are used and are those specified by Lime green. Neither Ecomerchant or Lime Green are able to help with problems that arise when system  components are substituted or omitted.

It is a requirement of your house building warranty provider and insurer that the system is used and installed is compliant with Lime Green’s technical approvals, doing so will ensure a durable, robust system requiring minimal maintenance.

Due to the nature of this system it is not available online. Call our team of experts to discuss your project requirements and we’ll help specify the correct materials for your site.

Please see Ecomerchant Protect External Wall Insulation System  Brochure download below


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Registered in England. Company No. 8638873
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