If you do render, consider EWI - I believe you are required to insulation upgrade in this situation anyway. If you can find someone who will do it without adding a "green premium" it will probably pay for itself in a few years.
If you need to find a tradesperson to get your job done, please try our local search below,
or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local