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What is UdiRECO?

Find out more about how we approach this building scenario.

UdiRECO is a really simple but unique solid wall insulation system for uneven surfaces. It is made up of two different layers, the front is a fairly rigid wood fibre board which carries the plaster or render and the backing is a softer form of wood fibre wool which moulds itself to the shape of the surface behind. Because you don’t need to render the wall flat first its perfect for using on stone buildings, old brick buildings or on rough rendered surfaces.

It comes in thicknesses from 80 up to 200 mm, the boards have a tongue and groove system on all edges and are fixed back to the wall with screw fixings. Using these fixings you can either flatten out walls or follow the contours of older walls to retain the character.

Externally, Unger’s UdiFOUNDATION COAT and self coloured UdiPERL render finishes it off to create a breathable, weather resistant surface.

The UdiINRECO system is exactly the same board but goes on the inside and uses the Multigrund moisture regulating plaster. This makes sure that you don’t get interstitial condensation in your walls.

So if you want a simple but highly effective insulation system for older buildings this is a great one for you. Contact us if you’d like to know more.

CPD Training

We offer CPD training for architects practices across Devon and Cornwall.

Software Modelling

We offer dynamic heat and moisture modelling as well as condensation risk analyses.

Building Plan Review

If you have some plans and would like our opinion on which materials would be the best for you, contact us.


Back to Earth is a natural building material supplier. We're not your typical builders'​ merchant though and instead work closely with our clients during the planning, designing and building phases of projects.

Back to Earth is a proud signatory of the Anti-Greenwash Charter:

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