We call it our fixed price quote. We're here to help you choose the option that's best for you. Insulation is more expensive and complex to install, but it's also an even bigger money-saver than draught-proofing making it well worth the effort. All new gas boilers have had to be condensing since 2005 (although in exceptional circumstances non-condensing boilers are allowed). It has been said that our passion for the work we undertake is astounding once the job is completed to your satisfaction.