How to make a conservatory or sunroom more energy efficient

Conservatories are feted as an elegant, inexpensive answer to tacking on a few more square metres of downstairs space. Picture: iStock
Conservatories and sunrooms are something of a darling in the suburbs of the UK and Ireland. Feted as an elegant, inexpensive answer to tacking on a few more square metres of downstairs space, hundreds of thousands of PVC and wood buildings based on Victorian and Edwardian heritage styles, have flown up over the past 40 years.
Modular, off-site designs, 40sq m or less and skimming under planning permission requirements, could be raised in a day in panel systems, resting lightly on easily installed slab bases and dwarf walls.