What can I use to insulate the outside of my extension?

Roberta Bell
Updated: Feb. 23, 2022

The extension was built over 40 years ago onto a stone built Edwardian house, the extension includes my kitchen, bathroom and utility room and has always been the coldest areas, I believe the extension was built using breeze block then covered with rough casting or harling, which is now starting to crack and fall off, I would appreciate any advice you can give me and who would I contact to complete such a task ? Thank you

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