Agree 100% with this. I love my conservatory, but only in spring/Autumn. Bloody freezing in winter and in summer its ridiculous. Plus they are graveyards for insects, and the bi-annual job of cleaning up dead flies/spiders etc is gruesome. If you do go for it, keep existing french doors so you can close the rest of the house from the conservatory. Otherwise all the heat just goes out through the roof.