Solid walls let through twice as much heat as cavity walls. They can be insulated by attaching a solid panel of insulation board to the wall either on the inside or outside of the wall. Use breathable insulation materials to allow the movement of air and reduce the possibility of damp.

Try to fit the insulation when having other major decorating or home improvement work done in the house. This is an expensive exercise which causes significant disruption, particularly when fitting internal insulation. It is advisable to check with your local planning authority whether permission is required for external wall insulation.

Internal insulation can result in a loss of space internally which whilst small (50-100mm off each wall insulated), can be quite restrictive in small properties.  For older properties constructed to be vapour permeable, advice should be taken on using breathable materials to avoid interstitial condensation.

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Solid wall insulation can make significant energy savings and add to thermal comfort. 

It is always worth checking whether any grants are available for this work.

Remember to check with your installer that the installation is covered by the SWIGA guarantee which gives 25 years cover for defective materials, design or workmanship or by other appropriate guarantees such as Kinnell ECO Guarantee (which covers most natural building technologies). Also check with your installer that the products/materials are BBA certified.

Find out more:

CSE	External Solid Wall Insulation Advice Leaflet;
	Internal Solid Wall Insulation Advice Leaflet;
EST	Solid Wall Insulation;