The lower cost and quicker build time of timber frame construction has seen an upsurge in this type of new build and we are getting a lot of enquiries concerning the outside render finish and how best to insulate the walls.

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The problem with rendering the outside leaf of a timber frame construction is the amount of thermal movement the structure has compared to a brick or block construction. On traditional cement based renders and pebbledash the extra movement can cause the render to open up and crack due to the rigidity of the cement element.

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Whilst incorporating expansion joints into the walls can help it does not really provide a long term solution and can affect the aesthetics of the property as well. What is needed is a material that has enough elasticity to absorb the extra movement without cracking.

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The latest acrylic, resin and silicate renders are all designed to avoid cracking and are flexible enough to handle a timber frame’s requirements regarding movement. For the traditionalist  a natural hydraulic lime render will also allow for movement and keep the walls dry and breathable.

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The only difference being that when selecting the insulation material the caustic nature of lime render calls for a wood fibre insulation slab rather than the mineral wool or phenolic that the anti-crack renders can be used on.

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If you require more information then please call us now on 08456 345866

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Timber framed construction is seeing an increase in popularity due in part to its lower build cost and quicker building times . There are many thousands of existing timber frame houses that were built over 25 years ago and for those that were finished in a render as opposed to a brick outer skin there has never been a better time to renew the render and simultaneously take advantage of being able to boost insulation.

By replacing existing cement renders with a lime render you are increasing the ability of the walls to breathe and also removing any cracking or movement problems as lime render is flexible and self- healing when it comes to cracks.

If you take the opportunity to add 100mm of natural hemp or sheep fleece behind an insulating wood fibre board the walls will achieve an incredible U value of 0.26 ie almost 50% more efficient than a brand new build meeting today’s strict insulation target of 0.35 !!

The cost savings on energy consumption are enormous and there will also be a considerable saving on CO2 emissions as well. As an added bonus of course your property will gain in value as a result of the far lower heating costs and better internal air quality and comfort.

Example of a timber frame insulation system:

For more information CALL US NOW  on 01908 516366 or email us by using the CONTACT US BUTTON if you prefer not to speak to someone in person. Either way we will deal courteously and promptly with your enquiry.