Currently we're having some technical problems with our telephone system. We apologise in advance if you've been affected by this. We're working to fix the issue as quickly as possible. In the meantime, our online services are still available.
Estimate based on a gas-heated detached home. Figures are based on fuel prices as of April 2019.
Source: https://energysavingtrust.org.uk/home-insulation/roof-and-loft