If you want to know how PAS2035 is applied to older buildings, read this: ‘Retrofitting traditional buildings for improved energy performance in the context of BSI PAS 2035’ has just been published in the Journal of Building Survey, Appraisal & Valuation Volume 9 Number 4. Prof Edwards is the only certified historic buildings expert to take part in the development of PAS2035, and here he provides his candid views on this BSI standard for retrofitting older buildings, as well as comparing and contrasting with other standards and guidance. Prof Edwards has also developed the only UK course in retrofitting older buildings, which he delivers for the Environment Study Centre. You can read the article here.